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\u6240\u4ee5\u5728\u4e00\u4e9b\u7528\u6237\u91cf\u6bd4\u8f83\u5927\u53d8\u5316\u6bd4\u8f83\u9ad8\u7684\u4e1a\u52a1\u91cc\u4f7f\u7528\u7f13\u5b58\u5c31\u80fd\u591f\u53bb\u89e3\u51b3\u8fd9\u6837\u7684\u9ad8\u5e76\u53d1\u95ee\u9898\u4e86\u3002\u4f46\u662f\u4f7f\u7528\u7f13\u5b58\uff0c\u5b83\u4e5f\u4f1a\u5e26\u6765\u4e00\u4e9b\u6210\u672c\u3002<\/p>\n\n\n\n<p>&nbsp;\u7b2c\u4e00\u4e2a\u5c31\u662f\u6570\u636e\u7684\u4e00\u81f4\u6027\u6210\u672c\uff0c\u4f60\u60f3\u6211\u4eec\u7684\u6570\u636e\u672c\u6765\u662f\u4fdd\u5b58\u5728\u6570\u636e\u5e93\u7684\uff0c\u73b0\u5728\u4f60\u628a\u5b83\u7f13\u5b58\u4e86\u4e00\u4efd\u653e\u5230\u4e86\u5185\u5b58\u91cc\uff0c\u6bd4\u5982redis\uff0c\u7528\u6237\u67e5\u8be2\u7684\u65f6\u5019\u4f18\u5148\u53bb\u67e5redis\uff0c\u8fd9\u6837\u6765\u51cf\u8f7b\u4e86\u6570\u636e\u5e93\u538b\u529b\uff0c\u4f46\u662f\u5982\u679c\u6570\u636e\u5e93\u7684\u6570\u636e\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u800c\u8fd9\u4e2a\u65f6\u5019redis\u91cc\u8fb9\u6216\u8005\u8bf4\u7f13\u5b58\u91cc\u9762\u7684\u6570\u636e\u8fd8\u662f\u65e7\u7684\u6570\u636e\uff0c\u73b0\u5728\u53c8\u4f1a\u53bb\u8bfb\u62ff\u5230\u7684\u6216\u8005\u8bfb\u5230\u7684\u662f\u4e0d\u662f\u5c31\u662f\u65e7\u7684\u6570\u636e\uff0c\u8fd9\u4e2a\u65f6\u5019\u4e24\u8005\u5c31\u4ea7\u751f\u4e86\u4e0d\u4e00\u81f4\uff0c\u5982\u679c\u662f\u4e00\u4e9b\u6bd4\u8f83\u91cd\u8981\u7684\u6570\u636e\u4ea7\u751f\u4e0d\u4e00\u81f4\uff0c\u751a\u81f3\u53ef\u80fd\u4f1a\u5e26\u6765\u6bd4\u8f83\u4e25\u91cd\u7684\u4e00\u4e9b\u95ee\u9898\u3002 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\u4e3a\u4e86\u907f\u514d\u7f13\u5b58\u96ea\u5d29\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u8fd8\u6709\u4fdd\u8bc1\u7f13\u5b58\u7684\u9ad8\u53ef\u7528\uff0c\u7f13\u5b58\u5f80\u5f80\u4f1a\u8981\u642d\u9700\u8981\u642d\u5efa\u6210\u96c6\u7fa4\u6a21\u5f0f\uff0c\u800c\u7f13\u5b58\u96c6\u7fa4\u7684\u8fd9\u6837\u4e00\u79cd\u90e8\u7f72\u7ef4\u62a4\u5c31\u4f1a\u6709\u989d\u5916\u7684\u4e00\u4e9b\u4eba\u529b\u4e0a\u7684\u4e00\u4e2a\u6210\u672c\u3002\u8fd8\u6709\u8fd9\u4e9b\u96c6\u7fa4\u90e8\u7f72\u7684\u8fc7\u7a0b\u4e2d\u662f\u5427\uff1f\u8fd8\u6709\u4e00\u4e9b\u786c\u4ef6\u7684\u6210\u672c\uff0c\u4f60\u770b\u4efb\u4f55\u4e1c\u897f\u90fd\u662f\u53cc\u5203\u5251\uff0c\u6709\u5f97\u5fc5\u6709\u5931\u3002\u90a3\u4e48\u56e0\u6b64\u4e00\u4e2a\u4f01\u4e1a\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u4f60\u8981\u53bb\u9009\u62e9\u4f60\u4eec\u4f7f\u7528\u7f13\u5b58\u4ee5\u540e\u5e26\u6765\u7684\u8fd9\u4e9b\u4e2a\u597d\u5904\uff0c\u80fd\u4e0d\u80fd\u53bb\u5f25\u8865\u5b83\u6240\u5e26\u6765\u7684\u4e00\u4e9b\u6210\u672c\uff1f\u5982\u679c\u4e0d\u80fd\u6211\u89c9\u5f97\u4e0d\u7528\u4e5f\u7f62\uff0c\u7279\u522b\u662f\u4e00\u4e9b\u4e2d\u5c0f\u578b\u7684\u4f01\u4e1a\uff0c\u7136\u540e\u521a\u521a\u8d77\u6b65\uff0c\u7528\u6237\u91cf\u4e5f\u4e0d\u5927\uff0c\u8fd9\u65f6\u5019\u4f60\u4e0d\u7528\u7f13\u5b58\uff0c\u5176\u5b9e\u4e5f\u80fd\u591f\u5e94\u5bf9\u65e5\u5e38\u7684\u7528\u6237\u8bf7\u6c42\uff0c\u90a3\u5c31\u6ca1\u6709\u5fc5\u8981\u53bb\u505a\u8fd9\u4ef6\u4e8b\u60c5\u4e86<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"248\" width=\"680\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/7172b19dada041bcbea99bd231df6e32.png\" alt=\"\"><\/p>\n\n\n\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u4e3a\u67e5\u8be2\u5546\u6237\u6765\u6dfb\u52a0redis\u7f13\u5b58<\/p>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u63a5\u53e3\u5c31\u662fshop\u8ddf\u4e0aid\u554a\uff0c\u4ed6\u5176\u5b9e\u76f4\u63a5shop service\u7684getbyid\uff0c\u800c\u8fd9\u4e2a\u662f\u7531iservice\u63a5\u53e3\u63d0\u4f9b\u7684\u90a3\u4e48i service\u5462\u662fmybatisplus \u76f4\u63a5\u8d70\u6570\u636e\u5e93\u67e5\u8be2<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">@GetMapping(\"\/{id}\")\npublic Result queryShopById(@PathVariable(\"id\") Long id) {\n    return Result.ok(shopService.getById(id));\n}<\/pre>\n\n\n\n<p>&nbsp;\u4f60\u9996\u5148\u5f97\u660e\u767d\u7f13\u5b58\u5de5\u4f5c\u7684\u4e00\u4e2a\u6a21\u578b\uff1a\u8fd9\u91cc\u6ca1\u6709\u6dfb\u52a0\u7f13\u5b58\u7684\u65f6\u5019\uff0c\u5ba2\u6237\u7aef\u5411\u6211\u4eec\u670d\u52a1\u5668\u53d1\u8d77\u7684\u8bf7\u6c42\uff0c\u90a3\u4e48\u90fd\u4f1a\u76f4\u63a5\u6253\u5230\u6211\u4eec\u7684\u6570\u636e\u5e93\uff0c\u800c\u6570\u636e\u5e93\u4ea7\u751f\u6570\u636e\u4ee5\u540e\u518d\u8fd4\u56de\u7ed9\u6211\u4eec\u7684\u5ba2\u6237\u7aef\uff0c\u6dfb\u52a0\u7f13\u5b58\u5c31\u7b49\u4e8e\u662f\u5728\u5ba2\u6237\u7aef\u4e0e\u6570\u636e\u5e93\u4e4b\u95f4\u6dfb\u52a0\u4e86\u4e00\u4e2a\u4e2d\u95f4\u5c42\uff0c\u6bd4\u5982\u8bf4\u6211\u4eec\u6dfb\u52a0\u4e00\u4e2aredis\u7f13\u5b58\uff0c\u8fd9\u6837\u4e00\u6765\u5ba2\u6237\u7aef\u8bf7\u6c42\u5c31\u4f1a\u4f18\u5148\u5230\u8fbe\u6211\u4eec\u7684\u7f13\u5b58it\u7684redis\u3002&nbsp;\u5982\u679c\u8bf4 redis\u91cc\u6070\u597d\u6709\u8fd9\u4e00\u90e8\u5206\u6570\u636e\uff0c\u90a3\u4e48\u5b83\u76f4\u63a5\u5c31\u8fd4\u56de\u4e86\uff0c\u8fd9\u6837\u8bf7\u6c42\u5c31\u4e0d\u4f1a\u5230\u8fbe\u6570\u636e\u5e93\uff0c\u90a3\u6570\u636e\u5e93\u538b\u529b\u662f\u4e0d\u662f\u5927\u5927\u51cf\u8f7b\u4e86\uff1f\u53ea\u6709\u5728\u745e\u58eb\u91cc\u6ca1\u6709\u8fd9\u90e8\u5206\u6570\u636e\u7684\u60c5\u51b5\u4e0b\uff0c\u4e5f\u5c31\u662f\u8bf4\u8bf7\u6c42\u4e3a\u6c11\u4f17\uff0c\u90a3\u4e48\u4ed6\u624d\u4f1a\u5230\u8fbe\u6211\u4eec\u7684\u6570\u636e\u5e93\uff0c\u8fd9\u4e2a\u65f6\u5019\u6570\u636e\u5e93\u5c31\u4f1a\u53bb\u5b8c\u6210\u81ea\u5df1\u7684\u67e5\u8be2\u52a8\u4f5c\u4e86\uff0c\u67e5\u8be2\u5b8c\u4ee5\u540e\u628a\u7ed3\u679c\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u5176\u5b9e\u771f\u6b63\u80fd\u591f\u5230\u8fbe\u6570\u636e\u5e93\u7684\u8bf7\u6c42\u662f\u4e0d\u662f\u5c31\u975e\u5e38\u5c11\u4e86\uff0c\u539f\u6765\u662f\u4e00\u4e2a\u53c8\u7c97\u53c8\u5927\u7684\u7bad\u5934\uff0c\u73b0\u5728\u662f\u4e0d\u662f\u53d8\u7ec6\u4e86\uff1f\u4f46\u662f\u6211\u4eec\u4e0d\u80fd\u6ee1\u8db3\u4e8e\u8fd9\u4e2a\u5c31\u5b8c\u4e86\uff0c\u4f60\u60f3\u5982\u679c\u4f60\u5230\u8fd9\u513f\u5c31\u7ed3\u675f\u4e86\u4e0d\u7ba1\u4e86\uff0c\u90a3\u4e48\u5728redis\u4e2d\u672a\u547d\u4e2d\u7684\u6570\u636e\uff0c\u4e0b\u4e00\u6b21\u662f\u4e0d\u662f\u4f9d\u7136\u662f\u672a\u547d\u4e2d\uff1f \u6240\u4ee5\u5982\u679credis\u672a\u547d\u4e2d\u67e5\u4e86\u6570\u636e\u5e93\uff0c\u6211\u4eec\u5e94\u8be5\u628a\u67e5\u5230\u7684\u6570\u636e\u662f\u4e0d\u662f\u5728\u5199\u56de\u5e94\u8bcd\u5f53\u4e2d\uff0c\u8fd9\u6837\u4e0b\u4e00\u6b21\u518d\u6765\u67e5\u8be2\u8fd9\u4e2a\u6570\u636e\u7684\u65f6\u5019\uff0c\u5c31\u53ef\u4ee5\u547d\u4e2d\u3002\u968f\u7740\u7528\u6237\u8bf7\u6c42\u7684\u6570\u636e\u8d8a\u6765\u8d8a\u591a\uff0credis\u5f53\u4e2d\u7f13\u5b58\u7684\u6570\u636e\u662f\u4e0d\u662f\u4e5f\u4f1a\u8d8a\u6765\u8d8a\u591a\uff0c\u90a3\u4e48redis\u7684\u547d\u4e2d\u7387\u4e5f\u8d8a\u6765\u8d8a\u9ad8\uff0c\u8fd9\u6837\u5c31\u5f62\u6210\u4e86\u4e00\u4e2a\u826f\u6027\u7684\u5de5\u4f5c\u6a21\u578b\u4e86<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"324\" width=\"660\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/720f12e17c4a4a4d90f483fa3158914c.png\" alt=\"\"><\/p>\n\n\n\n<p>\u90a3\u4e48\u6211\u4eec\u4ea7\u54c1\u5546\u6237\u7684\u4e1a\u52a1\u529f\u80fd\u53c2\u8003\u8fd9\u4e2a\u6a21\u578b\u9700\u8981\u505a\u51fa\u600e\u6837\u7684\u4e00\u4e9b\u4fee\u6539\u5462\uff1f\u6211\u4eec\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\uff0c\u9996\u5148\u6211\u4eec\u73b0\u5728\u4f1a\u4ece\u524d\u7aef\u63d0\u4ea4\u4e00\u4e2a\u5546\u94fa\u7684ID\uff0c\u5982\u679c\u662f\u4ee5\u524d\u76f4\u63a5\u662f\u4e0d\u662f\u5c31\u67e5\u8be2\u6570\u636e\u5e93\u4e86\uff1f\u4f46\u73b0\u5728\u4e0d\u884c\uff0c\u73b0\u5728\u6211\u4eec\u9996\u5148\u8981\u53bb\u67e5\u8be2redis\uff0c\u53bbredis\u67e5shop\uff0c\u8fd9\u4e2a\u5730\u65b9\u67e5\u5b8c\u4e86\u4ee5\u540e\u4e0d\u4e00\u5b9a\u80fd\u67e5\u5230.\u6240\u4ee5\u8bf4\u6211\u4eec\u9700\u8981\u5bf9\u67e5\u8be2\u7684\u7ed3\u679c\u505a\u4e00\u4e2a\u5224\u65ad\uff0c\u7f13\u5b58\u662f\u5426\u547d\u4e2d\u4e86\uff0c\u547d\u4e2d\u5c31\u4ee3\u8868\u67e5\u5230\u4e86\u6bd4\u8f83\u7b80\u5355\uff0c\u76f4\u63a5\u628a\u8fd9\u4e2a\u7ed3\u679c\u8fd4\u56de\u5c31\u884c\u4e86\uff0c\u8fd4\u56de\u4e0a\u90e8\u7ed3\u675f\u4e86\u3002\u672a\u547d\u4e2d\u7684\u60c5\u51b5\u4e0b\u5c31\u9ebb\u70e6\u4e00\u70b9\u4e86\uff0c\u672a\u547d\u4e2d\u6211\u4eec\u8fd8\u8981\u5148\u53bb\u67e5\u6570\u636e\u5e93\uff0c\u67e5\u6570\u636e\u5e93\u5176\u5b9e\u4e5f\u6709\u4e24\u79cd\u60c5\u51b5\uff0c\u4e00\u79cd\u662f\u5b58\u5728\uff0c\u4e00\u79cd\u662f\u4e0d\u5b58\u5728\uff0c\u76f4\u63a5\u7ed3\u679c\u662f\u4e0d\u662f\u5b58\u5728\uff1f \u5982\u679c\u67e5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\u8bc1\u660e\u7528\u6237\u63d0\u4ea4\u7684 ID\u662f\u9519\u8bef\u7684\uff0c\u6839\u672c\u7684\u6570\u636e\u5e93\u91cc\u5c31\u6ca1\u6709\u3002\u90a3\u4e48\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u7ecf\u8fc7\u5224\u65ad\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u6211\u4eec\u5e94\u8be5\u662f\u4e0d\u662f\u8fd4\u56de\u4e00\u4e2a404\u4e86\uff0c\u544a\u8bc9\u4ed6\u8bf4\u8fd9\u4e2a\u5546\u6237\u4e0d\u5b58\u5728\uff0c\u4f46\u662f\u5982\u679c\u8bf4\u6211\u4eec\u8fd9\u4e2a\u5730\u65b9\u67e5\u7684\u662f\u5b58\u5728\u7684\uff0c\u8bc1\u660e\u6570\u636e\u5e93\u91cc\u786e\u5b9e\u6709\uff0c\u6211\u4eec\u8981\u505a\u4e24\u4ef6\u4e8b\u5bf9\u5427\uff1f\u7b2c\u4e00\u662f\u628a\u8fd9\u4e2a\u7ed3\u679c\u5199\u5230redis\u91cc\uff0c\u786e\u4fdd\u4ec0\u4e48\uff1f\u4e0b\u4e00\u6b21\u518d\u6765\u67e5\u7684\u65f6\u5019\u662f\u4e0d\u662f\u80fd\u591f\u547d\u4e2d\uff0c\u6240\u4ee5\u8bf4\u6211\u4eec\u5148\u628a\u6570\u636e\u5199\u5230redis\uff0c\u800c\u540e\u6211\u4eec\u518d\u628a\u8fd9\u4e2a\u6570\u636e\u76f4\u63a5\u8fd4\u56de&nbsp;&nbsp;\u8fd4\u56de\u5546\u54c1\u4fe1\u606f\uff0c\u6240\u4ee5\u8bf4\u6211\u4eec\u66f4\u52a0\u4f4e\u4ea7\u4e1a\u5546\u94fa\u7684\u4e1a\u52a1\u6d41\u7a0b\u5c31\u4f1a\u53d8\u6210\u8fd9\u4e2a\u6837\u5b50\uff0c\u4e8e\u662f\u4e09\u8fde\u4fee\u6539control\uff0cService\u548cimpl<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    @GetMapping(\"\/{id}\")\n    public Result queryShopById(@PathVariable(\"id\") Long id) {\n        return shopService.queryById(id);\n    }<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.hmdp.service;\n\nimport com.hmdp.dto.Result;\nimport com.hmdp.entity.Shop;\nimport com.baomidou.mybatisplus.extension.service.IService;\n\n\/**\n * &lt;p&gt;\n *  \u670d\u52a1\u7c7b\n * &lt;\/p&gt;\n *\n * @author \u864e\u54e5\n * @since 2021-12-22\n *\/\npublic interface IShopService extends IService&lt;Shop&gt; {\n\n    Result queryById(Long id);\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.hmdp.service.impl;\n\nimport cn.hutool.core.util.StrUtil;\nimport cn.hutool.json.JSONUtil;\nimport com.hmdp.dto.Result;\nimport com.hmdp.entity.Shop;\nimport com.hmdp.mapper.ShopMapper;\nimport com.hmdp.service.IShopService;\nimport com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;\nimport org.springframework.data.redis.core.StringRedisTemplate;\nimport org.springframework.stereotype.Service;\n\nimport javax.annotation.Resource;\n\nimport static com.hmdp.utils.RedisConstants.CACHE_SHOP_KEY;\n\n\/**\n * &lt;p&gt;\n *  \u670d\u52a1\u5b9e\u73b0\u7c7b\n * &lt;\/p&gt;\n *\n * @author \u864e\u54e5\n * @since 2021-12-22\n *\/\n@Service\npublic class ShopServiceImpl extends ServiceImpl&lt;ShopMapper, Shop&gt; implements IShopService {\n\n    @Resource\n    private StringRedisTemplate stringRedisTemplate;\n    @Override\n    public Result queryById(Long id) {\n        String key = CACHE_SHOP_KEY+ id;\n        \/\/ 1.\u4eceredis\u67e5\u8be2\u5546\u94fa\u7f13\u5b58\n        String shopJson = stringRedisTemplate.opsForValue().get(key);\n        \/\/ 2.\u5224\u65ad\u662f\u5426\u5b58\u5728\n        if (StrUtil.isNotBlank(shopJson)) {\n            \/\/ 3.\u5b58\u5728\uff0c\u76f4\u63a5\u8fd4\u56de\n            Shop shop = JSONUtil.toBean(shopJson, Shop.class);\n            return Result.ok(shop);\n        }\n        \/\/ 4.\u4e0d\u5b58\u5728\uff0c\u6839\u636eid\u67e5\u8be2\u6570\u636e\u5e93\n        Shop shop = getById(id);\n        \/\/ 5.\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de\u9519\u8bef\n        if (shop == null) {\n            return Result.fail(\"\u5e97\u94fa\u4e0d\u5b58\u5728\uff01\");\n        }\n        \/\/ 6.\u5b58\u5728\uff0c\u5199\u5165redis\n        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(shop));\n        \/\/ 7.\u8fd4\u56de\n        return Result.ok(shop);\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u5728RESP\u4e2d\u67e5\u627e\u5230\u7f13\u5b58\u7684\u6587\u4ef6<img loading=\"lazy\" decoding=\"async\" height=\"319\" width=\"471\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/029aff61ad124cd99bc9971c1a8e745c.png\" alt=\"\"><\/p>\n\n\n\n<p>&nbsp;\u7ed9\u5e97\u94fa\u7c7b\u578b\u67e5\u8be2\u4e1a\u52a1\u6dfb\u52a0\u7f13\u5b58<\/p>\n\n\n\n<p>\u5e97\u94fa\u7c7b\u578b\u5728\u9996\u9875\u548c\u5176\u5b83\u591a\u4e2a\u9875\u9762\u90fd\u4f1a\u7528\u5230\uff0c\u5982\u56fe\uff1a\u9700\u6c42\uff1a\u4fee\u6539ShopTypeController\u4e2d\u7684queryTypeList\u65b9\u6cd5\uff0c\u6dfb\u52a0\u67e5\u8be2\u7f13\u5b58\uff0c\uff08\u672c\u4eba\u6ca1\u6709\u4fee\u6539\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Override\npublic Result queryShopList() {\n    \/\/ 1. \u4eceredis\u4e2d\u67e5\u8be2\u5546\u94fa\u7c7b\u578b\u5217\u8868\n    String jsonArray = stringRedisTemplate.opsForValue().get(\"shop-type\");\n    \/\/ json\u8f6clist\n    List&lt;ShopType> jsonList = JSONUtil.toList(jsonArray,ShopType.class);\n    System.out.println(\"json\"+jsonList);\n    \/\/ 2. \u547d\u4e2d\uff0c\u8fd4\u56deredis\u4e2d\u5546\u94fa\u7c7b\u578b\u4fe1\u606f\n    if (!CollectionUtils.isEmpty(jsonList)) {\n        return Result.ok(jsonList);\n    }\n    \/\/ 3. \u672a\u547d\u4e2d\uff0c\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u5546\u94fa\u7c7b\u578b,\u5e76\u6839\u636esort\u6392\u5e8f\n    List&lt;ShopType> shopTypesByMysql = query().orderByAsc(\"sort\").list();\n    System.out.println(\"mysql\"+shopTypesByMysql);\n    \/\/ 4. \u5c06\u5546\u94fa\u7c7b\u578b\u5b58\u5165\u5230redis\u4e2d\n    stringRedisTemplate.opsForValue().set(\"shop-type\",JSONUtil.toJsonStr(shopTypesByMysql));\n    \/\/ 5. \u8fd4\u56de\u6570\u636e\u5e93\u4e2d\u5546\u94fa\u7c7b\u578b\u4fe1\u606f\n    return Result.ok(shopTypesByMysql);\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7f13\u5b58\u66f4\u65b0\u7b56\u7565<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><\/td><td>\u5185\u5b58\u6dd8\u6c70<\/td><td>\u8d85\u65f6\u5254\u9664<\/td><td>\u4e3b\u52a8\u66f4\u65b0<\/td><\/tr><tr><td>\u8bf4\u660e&nbsp;<\/td><td>&nbsp;\u4e0d\u7528\u81ea\u5df1\u7ef4\u62a4\uff0c\u5229\u7528Redis\u7684\u5185\u5b58\u6dd8\u6c70\u673a\u5236\uff0c\u5f53\u5185\u5b58\u4e0d\u8db3\u65f6\u81ea\u52a8\u6dd8\u6c70\u90e8\u5206\u6570\u636e\u3002\u4e0b\u6b21\u67e5\u8be2\u65f6\u66f4\u65b0\u7f13\u5b58\u3002<\/td><td>&nbsp; &nbsp;\u7ed9\u7f13\u5b58\u6570\u636e\u6dfb\u52a0TTL\u65f6\u95f4\uff0c\u5230\u671f\u540e\u81ea\u52a8\u5220\u9664\u7f13\u5b58\u3002&nbsp;&nbsp;\u4e0b\u6b21\u67e5\u8be2\u65f6\u66f4\u65b0\u7f13\u5b58\u3002<\/td><td>&nbsp;\u7f16\u5199\u4e1a\u52a1\u903b\u8f91\uff0c\u5728\u4fee\u6539\u6570\u636e\u5e93\u7684\u540c\u65f6\uff0c\u66f4\u65b0\u7f13\u5b58\u3002<\/td><\/tr><tr><td>\u4e00\u81f4\u6027<\/td><td>\u5dee<\/td><td>\u4e00\u822c<\/td><td>\u597d<\/td><\/tr><tr><td>\u7ef4\u62a4\u6210\u672c<\/td><td>\u65e0<\/td><td>\u4f4e<\/td><td>\u9ad8<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4e1a\u52a1\u573a\u666f\uff1a<br>\u25cf \u4f4e\u4e00\u81f4\u6027\u9700\u6c42\uff1a\u4f7f\u7528\u5185\u5b58\u6dd8\u6c70\u673a\u5236\u3002\u4f8b\u5982\u5e97\u94fa\u7c7b\u578b\u7684\u67e5\u8be2\u7f13\u5b58<br>\u25cf 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through\uff0c\u5b9e\u5f55\u662f\u5c06\u6211\u4eec\u7684\u7f13\u5b58\u4e0e\u6570\u636e\u5e93\u6574\u5408\u6210\u4e00\u4e2a\u670d\u52a1\uff0c\u90a3\u4e48\u8fd9\u4e2a\u670d\u52a1\u4f60\u4e0d\u8981\u7ba1\u5b83\u5e95\u5c42\u5230\u5e95\u7528\u7684\u662f\u4ec0\u4e48\uff0c\u5bf9\u5916\u6765\u8bb2\u5b83\u5c31\u662f\u4e00\u4e2a\u900f\u660e\u7684\u670d\u52a1\u3002\u90a3\u4e48\u8fd9\u4e2a\u670d\u52a1\u56e0\u4e3a\u5185\u90e8\u540c\u65f6\u5904\u7406\u8001\u677f\u7684\u6570\u636e\u5e93\uff0c\u6240\u4ee5\u5b83\u662f\u53ef\u4ee5\u4fdd\u8bc1\u4e24\u8005\u7684\u5904\u7406\u540c\u65f6\u6210\u529f\u548c\u5931\u8d25\u7684\uff0c\u6240\u4ee5\u7531\u5b83\u6765\u7ef4\u62a4\u4e24\u8005\u7684\u4e00\u4e2a\u4e00\u81f4\u6027\u3002 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09:26 \u539f\u6587\uff1a 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10:35 \u539f\u6587\uff1a 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11:14 \u539f\u6587\uff1a 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12:38 \u539f\u6587\uff1a \u5f53\u6211\u4eec\u5199\u6570\u636e\u7684\u65f6\u5019\uff0c\u5f53\u6211\u4eec\u8981\u53bb\u5199\u7684\u65f6\u5019\uff0c\u6211\u4eec\u5148\u5199\u6570\u636e\u5e93\u518d\u5220\u7f13\u5b58\uff0c\u8fd9\u79cd\u53d1\u751f\u4fe1\u606f\u5b89\u5168\u95ee\u9898\u7684\u53ef\u80fd\u6027\u4f1a\u6700\u4f4e\u3002\u8fd9\u662f\u5199\u7684\u65f6\u5019\uff0c\u90a3\u4e48\u6211\u4eec\u5728\u8bfb\u7684\u65f6\u5019\u8bfb\u7684\u65f6\u5019\u8ddf\u4ee5\u524d\u6765\u8bb2\u53d8\u5316\u4e0d\u5927\uff0c\u8bfb\u53bb\u770b\u4e00\u4e0b\u7f13\u5b58\u6709\u6ca1\u6709\u7f13\u5b58\uff0c\u5982\u679c\u6709\u76f4\u63a5\u8fd4\u56de\u7f13\u5b58\u6ca1\u6709\uff0c\u54b1\u662f\u4e0d\u662f\u5c31\u67e5\u51fa\u6709\u8fc7\uff1f 12:52 \u539f\u6587\uff1a \u67e5\u5b8c\u6570\u636e\u5e93\u4ee5\u540e\u8fd8\u8981\u628a\u5b83\u5199\u56de\u5230\u7f13\u5b58\u91cc\uff0c\u4f46\u662f\u8981\u6ce8\u610f\u7684\u533a\u522b\u4e86\uff0c\u5199\u7f13\u5b58\u7684\u65f6\u5019\u8981\u662f\u4ec0\u4e48\u957f\u65f6\u95f4\u662f\u4e0d\u662f\u4f5c\u4e3a\u515c\u5e95\u65b9\u6848\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ed9\u67e5\u8be2\u5546\u94fa\u7684\u7f13\u5b58\u6dfb\u52a0\u8d85\u65f6\u5254\u9664\u548c\u4e3b\u52a8\u66f4\u65b0\u7684\u7b56\u7565<\/h3>\n\n\n\n<p>\u4fee\u6539ShopController\u4e2d\u7684\u4e1a\u52a1\u903b\u8f91\uff0c\u6ee1\u8db3\u4e0b\u9762\u7684\u9700\u6c42\uff1a<\/p>\n\n\n\n<p>1\uff09\u6839\u636eid\u67e5\u8be2\u5e97\u94fa\u65f6\uff0c\u5982\u679c\u7f13\u5b58\u672a\u547d\u4e2d\uff0c\u5219\u67e5\u8be2\u6570\u636e\u5e93\uff0c\u5c06\u6570\u636e\u5e93\u7ed3\u679c\u5199\u5165\u7f13\u5b58\uff0c\u5e76\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4<br>\u2461\u6839\u636eid\u4fee\u6539\u5e97\u94fa\u65f6\uff0c\u5148\u4fee\u6539\u6570\u636e\u5e93\uff0c\u518d\u5220\u9664\u7f13\u5b58<\/p>\n\n\n\n<p>\u4fee\u6539shopserviceimpl\u7684\u6709\u6548\u671f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public interface IShopService extends IService&lt;Shop&gt; {\n\n    Result queryById(Long id);\n\n    Result update(Shop shop);\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ 6.\u5b58\u5728\uff0c\u5199\u5165redis\n        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(shop),CACHE_SHOP_TTL, TimeUnit.MINUTES);\n        \/\/ 7.\u8fd4\u56de\n        return Result.ok(shop);<\/code><\/pre>\n\n\n\n<p>\u4fee\u6539ShopController\uff0c\u4ee5\u53ca\u987a\u5e26\u7684IShopService\u548cshopserviceimpl<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    @PutMapping\n    public Result updateShop(@RequestBody Shop shop) {\n        \/\/ \u5199\u5165\u6570\u636e\u5e93\n        return shopService.update(shop);\n    }<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    @Override\n    @Transactional\n    public Result update(Shop shop) {\n        Long id =shop.getId();\n        if(id==null){\n            return Result.fail(\"\u5e97\u94faid\u4e0d\u80fd\u4e3a\u7a7a\uff01\");\n        }\n        updateById(shop);\n        stringRedisTemplate.delete(CACHE_SHOP_KEY+id);\n        return Result.ok();\n    }<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u7684\u4e8b\u52a1\u53ea\u662f\u4e3a\u4e86\u8ba9\u6570\u636e\u5e93\u56de\u6eda\u7684\uff0c\u91cd\u70b9\u5728\u4e8e\u5f53redis\u62a5\u9519\u4e86\uff0c\u6570\u636e\u5e93\u80fd\u56de\u6eda\uff0credis\u672c\u8eab\u4e0d\u9700\u8981\u56de\u6eda<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7f13\u5b58\u7a7f\u900f<\/h3>\n\n\n\n<p>\u7f13\u5b58\u7a7f\u900f\u662f\u6307\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u6570\u636e\u5728\u7f13\u5b58\u4e2d\u548c\u6570\u636e\u5e93\u4e2d\u90fd\u4e0d\u5b58\u5728\uff0c\u8fd9\u6837\u7f13\u5b58\u6c38\u8fdc\u4e0d\u4f1a\u751f\u6548\uff0c\u8fd9\u4e9b\u8bf7\u6c42\u90fd\u4f1a\u6253\u5230\u6570\u636e\u5e93\u3002<br>\u5e38\u89c1\u7684\u89e3\u51b3\u65b9\u6848\u6709\u4e24\u79cd\uff1a<\/p>\n\n\n\n<p>1.\u7f13\u5b58\u7a7a\u5bf9\u8c61<br>\u4f18\u70b9\uff1a\u5b9e\u73b0\u7b80\u5355\uff0c\u7ef4\u62a4\u65b9\u4fbf<br>\u7f3a\u70b9\uff1a\u989d\u5916\u7684\u5185\u5b58\u6d88\u8017\uff0c\u53ef\u80fd\u9020\u6210\u77ed\u671f\u7684\u4e0d\u4e00\u81f4<\/p>\n\n\n\n<p>2.\u5e03\u9686\u8fc7\u6ee4<br>\u53ef\u4ee5\u7b80\u5355\u7684\u7406\u89e3\u4e3abit\u6570\u7ec4\uff0c\u5176\u5b9e\u5e76\u4e0d\u662f\u771f\u7684\u628a\u6570\u636e\u5b58\u50a8\u5230\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c\u800c\u662f\u5462\u628a\u8fd9\u4e9b\u6570\u636e\u57fa\u4e8e\u67d0\u4e00\u79cd\u54c8\u5e0c\u7b97\u6cd5\u8ba1\u7b97\u51fa\u4e00\u4e2ahash\u503c\uff0c\u7136\u540e\u5462\u518d\u5c06\u8fd9\u4e9b\u54c8\u5e0c\u503c\u8f6c\u5316\u4e3a\u4e8c\u8fdb\u5236\u4f4d\u4fdd\u5b58\u5230\u6211\u4eec\u5e03\u9686\u8fc7\u6ee4\u5668\u91cc\u3002\u5bf9\u5e94\u768401\u65b9\u5f0f\u4fdd\u5b58\uff0c\u5224\u65ad\u6570\u662f\u5426\u5b58\u5728\u5c31\u662f0\u6216\u80051.\u5f53\u7136\u8fd9\u4e0d\u80fd\u5b83\u5e76\u4e0d\u662f\u771f\u7684\u5c31\u767e\u5206\u4e4b\u767e\u7684\u51c6\u786e\uff0c\u4ed6\u8bf4\u4e0d\u5b58\u5728\u8fd9\u80af\u5b9a\u4e0d\u5b58\u5728\uff0c\u4f46\u662f\u8bf4\u5b58\u5728\u5c31\u4e0d\u4e00\u5b9a\u4e86\uff0c\u56e0\u4e3a\u4ed6\u544a\u8bc9\u6211\u8bf4\uff1a\u8fd9\u4e2a\u6570\u636e\u5b83\u5b58\u5728\uff0c\u653e\u5fc3\u4e86\uff0c\u4e8e\u662f\u5c31\u53bbredis\u67e5\uff0c\u7136\u540e\u53bbmysql\u67e5\uff0c\u53c8\u6ca1\u6709\uff0c\u53c8\u7a7f\u900f\u4e86<\/p>\n\n\n\n<p>&nbsp;\u5982\u679c\u8bf4\u4f60\u60f3\u81ea\u5df1\u53bb\u5b9e\u73b0\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c\u5176\u5b9e\u8fd8\u771f\u7684\u633a\u9ebb\u70e6\u3002\u597d\u5728\u6211\u4eecredis\u5176\u5b9e\u63d0\u4f9b\u4e86\u8fd9\u4e2abasemap\uff0c\u8fd9\u79cd\u65b9\u5f0f\u662f\u5b83\u81ea\u5e26\u7684\u4e00\u79cd\u4e0d\u80fd\u8fc7\u6ee4\u7684\u5b9e\u73b0<\/p>\n\n\n\n<p>\u4f18\u70b9\uff1a\u5185\u5b58\u5360\u7528\u8f83\u5c11\uff0c\u6ca1\u6709\u591a\u4f59key<br>\u7f3a\u70b9\uff1a\u5b9e\u73b0\u590d\u6742\uff1b\u5b58\u5728\u8bef\u5224\u53ef\u80fd<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"375\" width=\"661\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/f5b6b4c7698244dda44d4a2dc6e43ed8.png\" alt=\"\"><\/p>\n\n\n\n<p>&nbsp;\u9996\u5148\u901a\u8fc7\u7f13\u5b58\u7a7a\u5bf9\u8c61\u7684\u65b9\u5f0f\u6765\u89e3\u51b3\u7f13\u5b58\u7a7f\u900f<\/p>\n\n\n\n<p>\u6211\u4eec\u539f\u6765\u662f\u901a\u8fc7\u5982\u4e0b\u8fc7\u7a0b\uff0c\u9996\u5148\u5462\u524d\u7aef\u4f1a\u63d0\u4ea4\u5546\u94faid\u53bb\u67e5\u8be2\uff0c\u5148\u4eceredis\u67e5\u8be2\uff0c\u5982\u679credis\u547d\u4e2d\u4e86\u5c31ok\uff0c\u6ca1\u547d\u4e2d\u5c31\u67e5\u6570\u636e\u5e93\uff0c\u6570\u636e\u5e93\u6709\u5c31\u5199\u5230redis\u5e76\u4e14\u8fd4\u56de\uff0c\u6ca1\u6709\u5c31404<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"284\" width=\"676\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/6b56ab4a4ace46689c116802679979b8.png\" alt=\"\"><\/p>\n\n\n\n<p>\u4fee\u6539\u540e\u90a3\u4e48\u4f60\u547d\u4e2d\u7684\u5c31\u4e0d\u4e00\u5b9a\u662f\u5546\u94fa\u4fe1\u606f\u4e86\u800c\u662fnull\uff0c\u56e0\u6b64\u8fd8\u8981\u5bf9\u8fd9\u4e2a\u7ed3\u679c\u505a\u4e00\u4e2a\u5224\u65ad\uff0c\u5224\u65ad\u4e00\u4e0b\u547d\u4e2d\u7684\u662f\u4e0d\u662f\u7a7a\uff0c\u4e3ashopserviceimpl\u6dfb\u52a0<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    @Resource\n    private StringRedisTemplate stringRedisTemplate;\n    @Override\n    public Result queryById(Long id) {\n        String key = CACHE_SHOP_KEY+ id;\n        \/\/ 1.\u4eceredis\u67e5\u8be2\u5546\u94fa\u7f13\u5b58\n        String shopJson = stringRedisTemplate.opsForValue().get(key);\n        \/\/ 2.\u5224\u65ad\u662f\u5426\u5b58\u5728\n        if (StrUtil.isNotBlank(shopJson)) {\n            \/\/ 3.\u5b58\u5728\uff0c\u76f4\u63a5\u8fd4\u56de\n            Shop shop = JSONUtil.toBean(shopJson, Shop.class);\n            return Result.ok(shop);\n        }\n        \/\/\u8fd9\u4e2a\u5730\u65b9\u6839\u672c\u4e0d\u7528\u5224\u65ad,\u9664\u975e\u524d\u7aef\u4ee3\u7801\u88ab\u9ed1\u4e86\n        \/\/\u5224\u65ad\u547d\u4e2d\u7684\u662f\u5426\u662f\u7a7a\u503c\n        if(shopJson !=null) {\n            \/\/\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u4fe1\u606f\n            return Result.fail(\"\u5e97\u94fa\u4fe1\u606f\u4e0d\u5b58\u5728\uff01\");\n        }\n        \/\/ 4.\u4e0d\u5b58\u5728\uff0c\u6839\u636eid\u67e5\u8be2\u6570\u636e\u5e93\n        Shop shop = getById(id);\n        \/\/ 5.\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de\u9519\u8bef\n        if (shop == null) {\n            \/\/\u5c06\u7a7a\u503c\u5199\u5165redis\n            stringRedisTemplate.opsForValue().set(key, \"\", CACHE_NULL_TTL, TimeUnit.MINUTES);\n            return Result.fail(\"\u5e97\u94fa\u4e0d\u5b58\u5728\uff01\");\n        }\n        \/\/ 6.\u5b58\u5728\uff0c\u5199\u5165redis\n        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(shop),CACHE_SHOP_TTL, TimeUnit.MINUTES);\n       \/\/ 7.\u8fd4\u56de\n       return Result.ok(shop);\n    }\n\n\n<\/code><\/pre>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"260\" width=\"338\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/96e9728b20c64f01933ebb8041924900.png\" alt=\"\"><img loading=\"lazy\" decoding=\"async\" height=\"144\" width=\"322\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/e49b5d637c1546058cf2935c685f784e.png\" alt=\"\"><\/p>\n\n\n\n<p>\u540c\u6837\u7684\u6e05\u7a7aidea\u65e5\u8bb0\u540e\u5237\u65b0\u754c\u9762\u6ca1\u6709\u6253\u5370\u67e5\u8be2\u8fc7\u7a0b\uff0c\u8bf4\u660e\u5df2\u7ecfredis\u4e86\uff0c&nbsp;\u8bf7\u6c42\u6ca1\u6709\u7ecf\u8fc7\u6570\u636e\u5e93<\/p>\n\n\n\n<p>\u603b\u7ed3\u4e00\u4e0b\uff0c\u7f13\u5b58\u7a7f\u900f\u7684\u89e3\u51b3\u65b9\u6848\u6709\u54ea\u4e9b\uff1f<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7f13\u5b58null\u503c<\/li>\n\n\n\n<li>\u5e03\u9686\u8fc7\u6ee4<\/li>\n\n\n\n<li>\u589e\u5f3aid\u7684\u590d\u6742\u5ea6\uff0c\u907f\u514d\u88ab\u731c\u6d4bid\u89c4\u5f8b<\/li>\n\n\n\n<li>\u505a\u597d\u6570\u636e\u7684\u57fa\u7840\u683c\u5f0f\u6821\u9a8c<\/li>\n\n\n\n<li>\u52a0\u5f3a\u7528\u6237\u6743\u9650\u6821\u9a8c<\/li>\n\n\n\n<li>\u505a\u597d\u70ed\u70b9\u53c2\u6570\u7684\u9650\u6d41\uff08\u8be6\u89c1springcloud\uff09<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u7f13\u5b58\u96ea\u5d29<\/h3>\n\n\n\n<p>\u7f13\u5b58\u96ea\u5d29\u662f\u6307\u5728\u540c\u4e00\u65f6\u6bb5\u5927\u91cf\u7684\u7f13\u5b58key\u540c\u65f6\u5931\u6548\u6216\u8005Redis\u670d\u52a1\u5ca9\u673a\uff0c\u5bfc\u81f4\u5927\u91cf\u8bf7\u6c42\u5230\u8fbe\u6570\u636e\u5e93\uff0c\u5e26\u6765\u5de8\u5927\u538b\u529b\u3002<\/p>\n\n\n\n<p>\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n\n\n\n<ol 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alt=\"\"><\/p>\n\n\n\n<p>\u65e2\u7136T\u5b83\u6ca1\u6709TTL\uff0c\u6ca1\u6709\u5371\u673a\u65f6\u95f4\uff0c\u662f\u4e0d\u662f\u610f\u5473\u7740\u5c06\u6765\u53ef\u4ee5\u4e00\u65e6\u5b58\u50a8\u5230\u7c7b\u4f3c\u7684\u5b83\u5c31\u4f1a\u6c38\u4e0d\u8fc7\u671f\uff1f\u518d\u52a0\u4e0a\u6211\u4eec\u914d\u4e0a\u4e86\u5408\u9002\u7684\u4e00\u4e9b\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u7684\u8bdd\uff0c\u7406\u8bba\u4e0a\u8bb2\u4f60\u53ef\u4ee5\u8ba4\u4e3a\u53ea\u8981\u53ef\u4ee5\u5199\u5230\u8fd9\u91cc\u4e86\u4ee5\u540e\uff0c\u6c38\u8fdc\u90fd\u80fd\u591f\u67e5\u5230\uff0c\u4e0d\u4f1a\u51fa\u73b0\u672a\u547d\u4e2d\u7684\u60c5\u51b5\u3002<br>\u90a3\u4e48\u50cf\u8fd9\u6837\u7684\u4e00\u4e9b\u70ed\u70b9K\u5f80\u5f80\u90fd\u662f\u5728\u505a\u6d3b\u52a8\u7684\u65f6\u5019\u6211\u4eec\u53bb\u6dfb\u52a0\u8fdb\u53bb\u7684\uff0c\u6211\u4eec\u5728\u505a\u6d3b\u52a8\u7684\u540c\u65f6\u76f4\u63a5\u7ed9\u4ed6\u8bbe\u7f6e\u5bfc\u5165\u5f53\u4e2d\uff0c\u6dfb\u52a0\u4e0a\u903b\u8f91\u8fc7\u671f\u65f6\u95f4\uff0c\u6d3b\u52a8\u7ed3\u675f\u6211\u4eec\u518d\u628a\u5b83\u79fb\u9664\u5c31ok\u4e86\u3002\u56e0\u6b64\u4efb\u4f55\u7684\u7ebf\u7a0b\u6765\u53bb\u67e5\u8be2\u8fd9\u6837\u7684\u70ed\u70b9\u5546\u54c1\u7684\u65f6\u5019\uff0c\u7406\u8bba\u4e0a\u8bb2\u90fd\u662f\u53ef\u4ee5\u547d\u4e2d\u7684\u3002<br>\u90a3\u4e48\u5b83\u552f\u4e00\u9700\u8981\u5224\u65ad\u7684\u5c31\u662f\u5b83\u903b\u8f91\u4e0a\u6709\u6ca1\u6709\u8fc7\u671f\uff0c\u5982\u679c\u8bf4\u903b\u8f91\u4e0a\u5df2\u7ecf\u8fc7\u671f\u4e86\uff0c\u53ef\u80fd\u8bf4\u660eP\u5b83\u5df2\u7ecf\u662f\u4e00\u4e9b\u65e7\u7684\u6570\u636e\u4e86\uff0c\u9700\u8981\u66f4\u65b0\u3002<\/p>\n\n\n\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u9700\u8981\u80af\u5b9a\u8fd8\u662f\u9700\u8981\u53bb\u91cd\u5efa\u7f13\u5b58\uff0c\u4f46\u662f\u4e3a\u4e86\u907f\u514d\u6709\u591a\u4e2a\u7ebf\u7a0b\u90fd\u6765\u91cd\u5efa\uff0c\u4ed6\u4e5f\u8981\u53bb\u83b7\u53d6\u9501\u3002\u4f60\u8fd9\u91cc\u4e5f\u4f1a\u53bb\u9501\uff0c\u8ddf\u524d\u9762\u4e0d\u5c31\u4e00\u6837\u4e86\uff0c\u4e5f\u8981\u7b49\u5f85\u3002\u524d\u9762\u4e0d\u5c31\u662f\u56e0\u4e3a\u83b7\u53d6\u9501\uff0c\u7136\u540e\u5927\u5bb6\u4e92\u76f8\u7b49\u5f85\u800c\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u4f60\u8fd9\u91cc\u53c8\u8fc7\u53bb\u9501\uff0c\u6240\u4ee5\u4e3a\u4e86\u907f\u514d\u83b7\u53d6\u9501\u4ee5\u540e\u7b49\u5f85\u65f6\u95f4\u8fc7\u957f\uff0c\u4ed6\u62ff\u5230\u9501\u4e86\u4ee5\u540e\u4ed6\u4f1a\u5e72\u4e00\u4ef6\u4e8b\u60c5\uff0c\u4ed6\u4e0d\u662f\u81ea\u5df1\u89c9\u5f97\u6784\u5efa\uff0c\u4ed6\u4f1a\u5f00\u542f\u4e00\u4e2a\u72ec\u7acb\u7684\u65b0\u7684\u7ebf\u7a0b\uff0c\u7531\u8fd9\u4e2a\u7ebf\u7a0b\u53bb\u505a\u67e5\u8be2\u6570\u636e\u7f13\u5b58\u91cd\u5efa\u5199\u5165\u7f13\u5b58\u8fd9\u4e00\u6bb5\u903b\u8f91\uff0c\u5f53\u7136\u4e86\u5b83\u5199\u5165\u7f13\u5b58\u4ee5\u540e\u8981\u91cd\u7f6e\u903b\u8f91\u8f68\u8ff9\u65f6\u95f4\uff0c\u8fd9\u4e9b\u90fd\u505a\u5b8c\u4e86\u4ee5\u540e\u4ed6\u5c31\u53bb\u91ca\u653e\u9501\u4e86\u3002<br>\u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e00\u5806\u8017\u65f6\u6bd4\u8f83\u4e45\u7684\u4efb\u52a1\u4e0d\u518d\u662f\u7ebf\u7a0b\u4e00\u81ea\u5df1\u505a\u4e86\uff0c\u662f\u4e0d\u662f\u4ea4\u7ed9\u53e6\u5916\u4e00\u4e2a\u7ebf\u7a0b\u505a\u4e86\uff1f\u4ed6\u505a\u5b8c\u4e86\u4ee5\u540e\u53bb\u91ca\u653e\u9501\u3002\u90a3\u4e48\u5728\u4ed6\u5199\u5165\u7f13\u5b58\u4e4b\u524d\u8fd9\u4e00\u6bb5\u65f6\u95f4\u4ece\u8fd9\u6761\u7ebf\u5f80\u4e0a\u7684\u65f6\u95f4\uff0c\u5176\u5b9e\u7f13\u5b58\u662f\u90fd\u662f\u65e7\u7684\u6570\u636e \u3002\u8fd9\u4e2a\u65f6\u5019\u7ebf\u7a0b\u4e00\u5f00\u542f\u65b0\u7ebf\u7a0b\u5c31\u505a\u8fd9\u4e9b\u4e8b\u60c5\uff0c\u5b83\u5e72\u4ec0\u4e48\u5462\uff1fOk\u6211\u5b89\u6392\u4e86\u4e00\u4e2a\u4eba\u53bb\u5e2e\u6211\u91cd\u7f6e\u7f13\u5b58\u6570\u636e\u53bb\u4e86\uff0c\u6211\u5c31\u4e0d\u53bb\u505a\u4e86\uff0c\u76f4\u63a5\u8fd4\u56de\u65e7\u7684\u6570\u636e\uff0c\u6211\u4e4b\u524d\u67e5\u65e7\u6570\u636e\u662f\u4ec0\u4e48\uff0c\u6211\u76f4\u63a5\u8fd4\u56de\uff0c\u6211\u4e0d\u5728\u4e4e\uff0c\u90a3\u5c31\u662f\u65e7\u4e86\u4e00\u70b9\u4e5f\u80fd\u7528\u3002<\/p>\n\n\n\n<p>\u8fd4\u56de\u8fd9\u4e48\u6765\u505a\u3002Ok\u8fd9\u4e2a\u65f6\u5019\u5982\u679c\u518d\u6765\u4e86\u4e2a\u7ebf\u7a0b\uff0c\u4ed6\u4e5f\u6765\u6267\u884c\u7684\u65f6\u5019\uff0c\u56e0\u4e3a\u662f\u5728\u7eff\u7ebf\u4e4b\u4e0a\u662f\u5427\uff1f\u6b64\u65f6\u7f13\u5b58\u8fd8\u662f\u65e7\u7684\uff0c\u6240\u4ee5\u4ed6\u53bb\u67e5\u4e5f\u53d1\u73b0\u8fc7\u671f\uff0c\u53d1\u73b0\u8fc7\u671f\u4ed6\u4e5f\u8981\u6c42\u83b7\u53d6\u4e92\u65a5\u9501\uff0c\u4ed6\u4e00\u5b9a\u4f1a\u83b7\u53d6\u5931\u8d25\uff0c\u56e0\u4e3a\u6240\u8c13\u91ca\u653e\u4ed6\u83b7\u53d6\u5931\u8d25\u4e86\u5e72\u4ec0\u4e48\uff0c\u662f\u4e0d\u662f\u50cf\u8fd9\u4e9b\u90a3\u6837\u7b49\u5f85\uff1f\u91cd\u8bd5\u3002\u800c\u4e0d\u662f\u5982\u679c\u8fd9\u6837\u5c31\u6ca1\u4ec0\u4e48\u533a\u522b\u4e86\u5bf9\u5427\uff1f\u4ed6\u5e72\u4ec0\u4e48\uff1fOk\u4ed6\u4e5f\u4e00\u6837\uff0c\u539f\u6765\u5df2\u7ecf\u6709\u4eba\u5e2e\u6211\u53bb\u66f4\u65b0\u4e86\uff0c\u5305\u62ec\u83b7\u53d6\u5931\u8d25\u80af\u5b9a\u662f\u6709\u4eba\u66f4\u65b0\u4e86\uff0c\u76f4\u63a5\u628a\u6211\u67e5\u5230\u7684\u65e7\u6570\u636e\u8fd4\u56de\u5c31\u884c\u4e86\uff0c\u67e5\u5230\u4e86\u4e2a\u6570\u636e\uff0c\u7ed3\u679c\u662f\u65e7\u6570\u636e\uff0c\u7136\u540e\u522b\u4eba\u5df2\u7ecf\u5728\u66f4\u65b0<br>\u4e86\uff0c\u884c\u6211\u5148\u7528\u8fd9\u4e2a\u65e7\u7684\uff0c\u4f60\u5565\u65f6\u5019\u66f4\u65b0\u5b8c\u4e86\u518d\u8bf4\uff0c\u6211\u4e0d\u7ba1\u3002\u4e0d\u4e89\u4e0d\u62a2\u662f\u5427\uff1f<\/p>\n\n\n\n<p>\u8fd9\u65f6\u5019\u4ec0\u4e48\u65f6\u5019\u624d\u80fd\u67e5\u5230\u65b0\u6570\u636e\uff0c\u5c31\u662f\u6211\u4eec\u521a\u624d\u77e5\u9053\u8fd9\u4e2a\u7ebf\u7a0b\u4e8c\u8d1f\u8d23\u7f13\u5b58\u91cd\u5efa\u7684\uff0c\u7ebf\u7a0b\u6267\u884c\u5b8c\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u7ebf\u7a0b\u662f\u5728\u8fd9\u4e2a\u65f6\u95f4\u70b9\u6765\u53bb\u8bfb\u53d6\uff0c\u90a3\u4e48\u62ff\u5230\u7684\u5c31\u662f\u6700\u65b0\u7684\u6570\u636e\uff0c\u90a3\u4e48\u5b83\u5c31\u53ef\u4ee5\u8fd4\u56de\u65b0\u6570\u636e\u3002\u597d\uff0c\u8fd9\u5c31\u662f\u903b\u8f91\u8fc7\u671f\u8fd9\u6837\u4e00\u79cd\u65b9\u6848\u3002\u90a3\u4e48\u8fd9\u4e24\u79cd\u65b9\u6848\u6211\u4eec\u6765\u5bf9\u6bd4\u4e00\u4e0b\u4ed6\u4eec\u7684\u4e00\u4e2a\u4f18\u7f3a\u70b9\u3002\u9996\u5148\u4e92\u65a5\u9501\u8fd9\u79cd\u65b9\u6848\u4ed6\u9996\u5148\u6ca1\u6709\u989d\u5916\u7684\u5185\u5b58\u6d88\u8017\uff0c\u4e3a\u4ec0\u4e48\uff1f\u8fd9\u662f\u76f8\u6bd4\u4e8e\u903b\u8f91\u8fc7\u53bb\u6765\u8bb2\u7684\u3002\u903b\u8f91\u8fc7\u671f\u7684\u8bdd\uff0c\u5728\u539f\u6709\u7684\u6570\u636e\u7684\u57fa\u7840\u4e0a\uff0c\u4f60\u8981\u591a\u7ef4\u62a4\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4\u7684\u5b57\u6bb5\uff0c\u662f\u4e0d\u662f\u6709\u989d\u5916\u7684\u5185\u5b58\u6d88\u8017\uff0c\u800c\u6211\u4eec\u7684\u4e92\u65a5\u8fd9\u79cd\u65b9\u6848\u5219\u4e0d\u9700\u8981\u53bb\u4fdd\u5b58\u903b\u8f91\u5f52\u671f\uff0c\u6240\u4ee5\u8fd9\u5757\u5185\u5b58\u5360\u7528\u662f\u6bd4\u8f83\u5c0f\u7684\uff0c\u6ca1\u6709\u989d\u5916\u7684\u5185\u5b58\u6d88\u8017\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u89e3\u51b3\u65b9\u6848<\/td><td>\u4f18\u70b9<\/td><td>\u7f3a\u70b9<\/td><\/tr><tr><td>\u4e92\u65a5\u9501<\/td><td>\u6ca1\u6709\u989d\u5916\u7684\u5185\u5b58\u6d88\u8017 \u4fdd\u8bc1\u4e00\u81f4\u6027 \u5b9e\u73b0\u7b80\u5355<\/td><td>\u7ebf\u7a0b\u9700\u8981\u7b49\u5f85\uff0c\u6027\u80fd\u53d7\u5f71\u54cd<br>\u53ef\u80fd\u6709\u6b7b\u9501\u98ce\u9669<\/td><\/tr><tr><td>\u903b\u8f91\u8fc7\u671f<\/td><td>\u7ebf\u7a0b\u65e0\u9700\u7b49\u5f85\uff0c\u6027\u80fd\u8f83\u597d<\/td><td>\u4e0d\u4fdd\u8bc1\u4e00\u81f4\u6027 \u6709\u989d\u5916\u5185\u5b58\u6d88\u8017<br>\u5b9e\u73b0\u590d\u6742<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u57fa\u4e8e\u4e92\u65a5\u9501\u65b9\u5f0f\u89e3\u51b3\u7f13\u5b58\u51fb\u7a7f\u95ee\u9898<br><br><img loading=\"lazy\" decoding=\"async\" height=\"275\" width=\"376\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/6530880f54624367924a4bb1c096dd5f.png\" alt=\"\"><\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<ol class=\"wp-block-list\">\n<li><strong>JUC \u7684 <code>tryLock<\/code> \u53ea\u80fd\u5728\u5355\u673a\u60c5\u51b5\u4e0b\u9501\u4f4f<\/strong>\uff1a<br>JUC\uff08Java Util Concurrency\uff09\u7684 <code>tryLock<\/code> \u662f\u57fa\u4e8e\u672c\u5730\u7ebf\u7a0b\u7684\u9501\u673a\u5236\uff0c\u9002\u7528\u4e8e\u5355\u673a\u73af\u5883\u3002\u5b83\u65e0\u6cd5\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u534f\u8c03\u591a\u4e2a\u8282\u70b9\u7684\u7ebf\u7a0b\uff0c\u56e0\u6b64\u65e0\u6cd5\u89e3\u51b3\u5206\u5e03\u5f0f\u573a\u666f\u4e0b\u7684\u7f13\u5b58\u51fb\u7a7f\u95ee\u9898\u3002<\/li>\n\n\n\n<li><strong>Redis \u7684 <code>SETNX<\/code> \u53ef\u4ee5\u505a\u5206\u5e03\u5f0f\u9501<\/strong>\uff1a<br>Redis \u7684 <code>SETNX<\/code> \u547d\u4ee4\uff08SET if Not Exists\uff09\u662f\u4e00\u4e2a\u539f\u5b50\u64cd\u4f5c\uff0c\u53ef\u4ee5\u7528\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u3002\u901a\u8fc7 <code>SETNX<\/code>\uff0c\u53ea\u6709\u5f53\u952e\u4e0d\u5b58\u5728\u65f6\u624d\u80fd\u8bbe\u7f6e\u6210\u529f\uff0c\u4ece\u800c\u786e\u4fdd\u4e86\u9501\u7684\u4e92\u65a5\u6027\u3002\u6b64\u5916\uff0c\u7ed3\u5408 <code>EXPIRE<\/code> \u547d\u4ee4\u53ef\u4ee5\u8bbe\u7f6e\u9501\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u907f\u514d\u6b7b\u9501\u95ee\u9898\u3002<\/li>\n\n\n\n<li><strong>Redisson \u4e5f\u53ef\u4ee5\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/strong>\uff1a<br>Redisson \u662f\u4e00\u4e2a\u57fa\u4e8e Redis \u7684\u5206\u5e03\u5f0f\u9501\u6846\u67b6\uff0c\u5e95\u5c42\u4f7f\u7528 <code>SETNX<\/code> \u548c Lua \u811a\u672c\u4fdd\u8bc1\u539f\u5b50\u6027\uff0c\u652f\u6301\u591a\u79cd\u9501\u7684\u5b9e\u73b0\u65b9\u5f0f\uff08\u5982\u53ef\u91cd\u5165\u9501\u3001\u516c\u5e73\u9501\u7b49\uff09\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e86\u65b9\u4fbf\u7684 API\uff0c\u4f7f\u5f97\u5206\u5e03\u5f0f\u9501\u7684\u4f7f\u7528\u66f4\u52a0\u7b80\u5355\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n<p>&nbsp;set nx\u547d\u4ee4\uff0c\u53ef\u4ee5\u7ed9\u4e00\u4e2akey\u8d4b\u503c\uff0c\u5f53\u4e14\u4ec5\u5f53\u8fd9\u4e2akey\u4e0d\u5b58\u5728\u7684\u65f6\u5019\u53bb\u6267\u884c\u3002\u56e0\u4e3aredis\u662f\u5355\u7ebf\u7a0b\u7684 \u6240\u4ee5\u518d\u591a\u7ebf\u7a0b\u53d1\u8d77setnx\u8bf7\u6c42 \u4e5f\u90fd\u5fc5\u987b\u4e32\u884c<\/p>\n\n\n\n<p>\u70ed\u70b9\u4e8b\u4ef6\u8981\u6ee1\u8db3\u4e24\u70b9\u6761\u4ef6\uff0c1.\u9ad8\u5e76\u53d12.\u7f13\u5b58\u91cd\u5efa\u7684\u65f6\u95f4\u6bd4\u8f83\u4e45\u3002\u4e0b\u8f7dApache Jmeter\u7684\u538b\u7f29\u5305\uff0c\u6253\u5f00bin\/jmeter.bat\u5373\u53ef\uff0c\u53f3\u952e\u9010\u6e10\u8bbe\u7f6e\u4e00\u4e2a\u5bf9\u7aef\u53e3\u53f78081\u7684QPS200\u7684\u8bf7\u6c42\u91cf<br><img loading=\"lazy\" decoding=\"async\" height=\"376\" width=\"653\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/651bff4c7feb45fe9327d3cb0699a4a3.png\" alt=\"\"><img loading=\"lazy\" decoding=\"async\" height=\"270\" width=\"664\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/6752de80dfc24e4ba8b6fe320f1f5349.png\" alt=\"\"><\/p>\n\n\n\n<p>\u6e05\u9664redis\u7684\u6240\u6709\u7f13\u5b58\u540e\u5c0f\u4e09\u89d2\u8fd0\u884c\u53ef\u4ee5\u770b\u5230\u53ef\u4ee5\u8fd0\u884c\u3002idea\u53ea\u5bf9sql\u67e5\u8be2\u4e86\u4e00\u6b21<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u57fa\u4e8e\u903b\u8f91\u8fc7\u671f\u65b9\u5f0f\u89e3\u51b3\u7f13\u5b58\u51fb\u7a7f\u95ee\u9898<\/h3>\n\n\n\n<p>\u9700\u6c42\uff1a\u4fee\u6539\u6839\u636eid\u67e5\u8be2\u5546\u94fa\u7684\u4e1a\u52a1\uff0c\u8fc7\u671f\u65b9\u5f0f\u6765\u89e3\u51b3\u7f13\u5b58\u51fb\u7a7f\u95ee\u9898<\/p>\n\n\n\n<p>\u56e0\u4e3a\u8fd9\u4e9b\u662f\u70ed\u70b9\u6570\u636e,\u7f13\u5b58\u9884\u70ed\u63d0\u524d\u52a0\u8f7d\u7684,\u5982\u679c\u6ca1\u6709,\u5219\u8bc1\u660e\u4f60\u67e5\u8be2\u7684\u6570\u636e,\u4e0d\u5728\u8fd9\u6b21\u6d3b\u52a8\u4e2d,\u4e5f\u5c31\u662f\u65e0\u6548\u7684\u6570\u636e,\u7c7b\u4f3c\u4e8e\u5e03\u9686\u8fc7\u6ee4\u5668\u4e00\u6837\u7684\u611f\u89c9<\/p>\n\n\n\n<p>\u597d\u8fd9\u91cc\u5176\u5b9e\u6709\u4e24\u79cd\u601d\u8def\uff0c\u7b2c\u4e00\u79cd\u662f\u5c31\u662f\u6211\u4eec\u5148\u53bb\u5728utils\/\u4e0b\u5b9a\u4e49\u4e00\u4e2a\u5bf9\u8c61RedisData.java\uff1a\u5b9a\u4e49\u4e00\u4e2a\u6210\u5458\u53d8\u91cf\uff0c\u7c7b\u578b\u7684\u5c31\u662flocaldatetime\u3002\u60f3\u8981shop\u5177\u5907\u8fc7\u671f\u65f6\u95f4\u7684\u5c5e\u6027\uff0c\u5c31\u8ba9shop\u7ee7\u627f\u4e86\u6211\u4eec\u7684redisdata\u3002\u7b2c\u4e8c\u79cd\u662fredisdata\u81ea\u5df1\u5e26data\uff0c\u4f18\u5148\u7528\u7ec4\u5408\uff0c\u5c11\u7528\u7ee7\u627f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.hmdp.utils;\n\nimport lombok.Data;\n\nimport java.time.LocalDateTime;\n\n@Data\npublic class RedisData {\n    private LocalDateTime expireTime;\n    private Object data;\n}<\/code><\/pre>\n\n\n\n<p>\u88c5\u9970\u5668\u6a21\u5f0f\uff1a\u901a\u8fc7\u5c06\u5bf9\u8c61\u653e\u5165\u5305\u542b\u884c\u4e3a\u7684\u7279\u6b8a\u5305\u88c5\u7c7b\u4e2d\u6765\u4e3a\u539f\u59cb\u5bf9\u8c61\u52a8\u6001\u7684\u6dfb\u52a0\u65b0\u884c\u4e3a\u3002\u8fd9\u79cd\u6a21\u5f0f\u662f\u7ee7\u627f\u7684\u4e00\u79cd\u66ff\u4ee3\u65b9\u6848\uff0c\u53ef\u4ee5\u7075\u6d3b\u7684\u6269\u5c55\u5bf9\u8c61\u7684\u529f\u80fd\uff0c\u5728shopserviceImpl\u4e2d\u6dfb\u52a0\u5982\u4e0bcode<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    public void saveShop2Redis(Long id, Long expireSeconds){\n    \/\/1.\u67e5\u8be2\u5e97\u94fa\u6570\u636e\n    Shop shop = getById(id);\n    \/\/2.\u5c01\u88c5\u903b\u8f91\u8fc7\u671f\u65f6\u95f4\n    RedisData redisData = new RedisData();\n    redisData.setData(shop);\n    redisData.setExpireTime(LocalDateTime.now().\n\n    plusSeconds(expireSeconds));\n    \/\/3.\u5199\u5165Redis\n    stringRedisTemplate.opsForValue().set(CACHE_SHOP_KEY+id, JSONUtil.toJsonStr(redisData));\n}<\/code><\/pre>\n\n\n\n<p>&nbsp;\u4fee\u6539\u542f\u52a8\u9879\u7684HmDianPingApplicationTests.java\uff08test\u4e00\u5b9a\u8981junit\u7684api\u7684test\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.hmdp;\n\nimport com.hmdp.service.impl.ShopServiceImpl;\nimport org.junit.jupiter.api.Test;\nimport org.springframework.boot.test.context.SpringBootTest;\nimport org.springframework.data.redis.core.RedisTemplate;\n\nimport javax.annotation.Resource;\n\n@SpringBootTest\nclass HmDianPingApplicationTests {\n\n    @Resource\n    private ShopServiceImpl shopService;\n\n\n    @Test\n    public void testSaveShop(){\n        shopService.saveShop2Redis(1L,10L);\n    }\n\n}<\/code><\/pre>\n\n\n\n<p>\u70b9\u51fbtest\u5de6\u8fb9\u7684\u7eff\u8272\u4e09\u89d2\uff0c<img loading=\"lazy\" decoding=\"async\" height=\"90\" width=\"277\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/ca06bf3f611b4eb19125be42fa42ec57.png\" alt=\"\">\u6b63\u786e\u8fd0\u884c\u8bbe\u7f6e\u903b\u8f91\u8fc7\u671f\u65f6\u95f4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n  \"data\": {\n    \"area\": \"\u5927\u5173\",\n    \"openHours\": \"10:00-22:00\",\n    \"sold\": 4215,\n    \"images\": \"https:\/\/qcloud.dpfile.com\/pc\/jiclIsCKmOI2arxK\nN1Uf0Hx3PucI\nJH8q0QSz-Z8llzcN56-_QiKuOvyio1OOxsRtFoXqu0G3iT2T27qat3WhLVEuLYk00OmSS1\nIdNpm8K8sG4JN9RIm2mTK\ncbLtc2o2vfCF2ubeXzk49OsGrXt_KYDCngOyCwZK-s3fqawWswzk.jpg,https:\/\/qcloud.\ndpfile.com\n\/pc\/IOf6VX3qaBgFXF\nVgp75w-KKJmWZjFc8GXDU8g9bQC6YGCpAmG00QbfT4vCCBj7njuzFvxlbkWx5uwqY2qcjixFEuLYk\n00OmSS1IdNpm8K8sG4JN9RIm2mTKcbLtc2o2vmIU_8ZGOT1OjpJmLxG6urQ.jpg\",\n    \"address\": \"\u91d1\u534e\u8def\u9526\u660c\u6587\u534e\u82d129\u53f7\",\n    \"comments\": 3035,\n    \"avgPrice\": 80,\n    \"updateTime\": 1642066339000,\n    \"score\": 37,\n    \"createTime\": 1640167839000,\n    \"name\": \"103\u8336\u9910\u5385\",\n    \"x\": 120.149192,\n    \"y\": 30.316078,\n    \"typeId\": 1,\n    \"id\": 1\n  },\n  \"expireTime\": 1744298913115\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.hmdp.service.impl;\n\nimport cn.hutool.core.util.BooleanUtil;\nimport cn.hutool.core.util.StrUtil;\nimport cn.hutool.json.JSONObject;\nimport cn.hutool.json.JSONUtil;\nimport com.hmdp.dto.Result;\nimport com.hmdp.entity.Shop;\nimport com.hmdp.mapper.ShopMapper;\nimport com.hmdp.service.IShopService;\nimport com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;\nimport com.hmdp.utils.RedisData;\nimport org.apache.ibatis.annotations.Results;\nimport org.springframework.data.redis.core.StringRedisTemplate;\nimport org.springframework.stereotype.Service;\nimport org.springframework.transaction.annotation.Transactional;\n\nimport javax.annotation.Resource;\n\nimport java.time.LocalDateTime;\nimport java.util.concurrent.ExecutorService;\nimport java.util.concurrent.Executors;\nimport java.util.concurrent.TimeUnit;\n\nimport static com.hmdp.utils.RedisConstants.*;\n\n\/**\n * &lt;p&gt;\n *  \u670d\u52a1\u5b9e\u73b0\u7c7b\n * &lt;\/p&gt;\n *\n * @author \u864e\u54e5\n * @since 2021-12-22\n *\/\n@Service\npublic class ShopServiceImpl extends ServiceImpl&lt;ShopMapper, Shop&gt; implements IShopService {\n\n    @Resource\n    private StringRedisTemplate stringRedisTemplate;\n\n    @Override\n    public Result queryById(Long id) {\n        \/\/\u7f13\u5b58\u7a7f\u900f\n        \/\/Shop shop=queryWithPassThrough(id);\n        \/\/\u4e92\u65a5\u9501\u89e3\u51b3\u7f13\u5b58\u51fb\u7a7f\n        \/\/Shop shop = queryWithMutex(id);\n        \/\/\u903b\u8f91\u8fc7\u671f\u89e3\u51b3\u7f13\u5b58\u51fb\u7a7f\n        Shop shop=queryWithLogicslExpire(id);\n\n        if (shop == null) {\n            return Result.fail(\"\u5e97\u94fa\u4e0d\u5b58\u5728\uff01\");\n        }\n        \/\/7.\u8fd4\u56de\n        return Result.ok(shop);\n\n    }\n    private static final ExecutorService CACHE_REBUILD_EXECUTOR = Executors.newFixedThreadPool(10);\n    public Shop queryWithLogicslExpire(Long id) {\n        String key = CACHE_SHOP_KEY + id;\n        \/\/ 1.\u4eceredis\u67e5\u8be2\u5546\u94fa\u7f13\u5b58\n        String shopJson = stringRedisTemplate.opsForValue().get(key);\n        \/\/ 2.\u5224\u65ad\u662f\u5426\u5b58\u5728\n        \/\/\u4e3a\u4ec0\u4e48\u4e0d\u7528\u8003\u8651\u7f13\u5b58\u7a7f\u900f\u7684\u60c5\u51b5\uff0c\u56e0\u4e3a\u6240\u6709\u7684\u6570\u636e\u90fd\u653e\u5165\u5230redis\u4e2d\u9884\u70ed\u4e86\uff0c\u4e00\u65e6\u7f13\u5b58\u67e5\u8be2\u51fa\u662fnull\u7684\uff0c\n        \/\/\u8bf4\u660e\u6570\u636e\u5e93\u6ca1\u8fd9\u4e2a\u6570\u636e\n        if (StrUtil.isBlank(shopJson)) {\n            \/\/ 3.\u5b58\u5728\uff0c\u76f4\u63a5\u8fd4\u56de\n            return null;\n        }\n\n        \/\/\u7f13\u5b58\u51fb\u7a7f\u5c31\u662f\u89e3\u51b3\u70ed\u70b9key\u7684\uff0c\u70ed\u70b9key\u76f4\u63a5\u53bb\u67e5\u6570\u636e\u5e93\u4f1a\u7206\u7684\uff0c\u6240\u4ee5\u4f1a\u76f4\u63a5\u5b58\u5230redis\u7f13\u5b58\u4e2d\uff0c\u548c\u6570\u636e\u5e93\u6ca1\u6709\u5173\u7cfb\n        \/\/\u8fd9\u4e2a\u903b\u8f91\u8fd8\u662f\u6709\u95ee\u9898\u7684\uff0c\u6211\u66f4\u65b0\u5e97\u94fa\u4fe1\u606f\uff0c\u80af\u5b9a\u8981\u5220\u9664\u7f13\u5b58\u7684\uff0c\u90a3\u4e48\u5728\u8fd9\u91cc\u80af\u5b9a\u662f\u672a\u547d\u4e2d\u7684\uff0c\u8fd9\u5565\u5440\n        \/\/4.\u547d\u4e2d\uff0c\u9700\u8981\u5148\u628ajson\u53cd\u5e8f\u5217\u5316\u4e3a\u5bf9\u8c61\n        \/\/\u6cdb\u578b\u5904\u7406RedisData redisData = JSONUtil.toBean(shopJson, new TypeReference&lt;RedisData&lt;Shop&gt;&gt;() {}, false);\n        RedisData redisData=JSONUtil.toBean(shopJson,RedisData.class);\n        Shop shop=JSONUtil.toBean((JSONObject)redisData.getData(),Shop.class);\n        LocalDateTime expireTime =redisData.getExpireTime();\n        \/\/\u52a0\u4e86\u6cdb\u578b\u4f1a\u5728\u7f16\u8bd1\u7684\u65f6\u5019\u88ab\u64e6\u9664\uff0c\u83b7\u5f97\u4f9d\u65e7\u662fJSON\uff1b\n        \/\/ Object\u5bf9\u8c61\u5f3a\u8f6c\u7684\u81ea\u5df1\u8bd5\u4e00\u4e0b\u518d\u6765\u5427\uff0c\u8001\u5e08\u90fd\u8bf4\u4e86 \u62ff\u5230\u7684\u5b9e\u9645\u662fJSONObject\uff0c\u4e0d\u80fd\u5f3a\u8f6c\u4e3ashop\n        \/\/\u6cdb\u578b\u7684\u7528\u8fd9\u4e2a\uff1aJSONUtil.toBean(shopJson, new TypeReference&lt;RedisData&lt;Shop&gt;&gt;() {}, false)\n        \/\/5.\u5224\u65ad\u662f\u5426\u8fc7\u671f\n        if(expireTime.isAfter(LocalDateTime.now())) {\n            \/\/5.1.\u672a\u8fc7\u671f\uff0c\u76f4\u63a5\u8fd4\u56de\u5e97\u94fa\u4fe1\u606f\n            return shop;\n        }\n        \/\/5.2.\u5df2\u8fc7\u671f\uff0c\u9700\u8981\u7f13\u5b58\u91cd\u5efa\n        \/\/6.\u7f13\u5b58\u91cd\u5efa\n        \/\/6.1.\u83b7\u53d6\u4e92\u5385\u9501\n        String lockKey=LOCK_SHOP_KEY+id;\n        boolean isLock=tryLock(lockKey);\n        \/\/6.2.\u5224\u65ad\u662f\u5426\u83b7\u53d6\u9501\u6210\u529f\n        if(isLock) {\n            \/\/6.3.\u6210\u529f\uff0c\u5f00\u542f\u72ec\u7acb\u7ebf\u7a0b\uff0c\u5b9e\u73b0\u7f13\u5b58\u91cd\u5efa\n            \/\/\u6ce8\u610f\uff1a\u83b7\u53d6\u9501\u6210\u529f\u5e94\u8be5\u518d\u6b21\u68c0\u6d4bredis,\u7f13\u5b58\u662f\u5426\u8fc7\u671f\uff0c\u505aDoubleCheck,\u5982\u679c\u5b58\u5728\u5219\u65e0\u9700\u91cd\u5efa\u7f13\u5b58\u3002\n            \/\/\u8fd9\u91cc\u9700\u8981\u53cc\u91cd\u68c0\u67e5\uff01\u5982\u679c\u7ebf\u7a0ba\u8fd8\u6ca1\u8d70\u5230\u83b7\u53d6\u9501\u8fd9\u6b65\uff0cb\u5df2\u7ecf\u91cd\u5efa\u5b8c\u91ca\u653e\u9501\u4e86\uff0c\u90a3\u4e48a\u5c31\u4f1a\u62ff\u5230\u9501\u518d\u6b21\u91cd\u5efa;\n            \/\/ \u4e0d\u53cc\u91cd\u68c0\u67e5\u7684\u8bdd\u540e\u9762\u7684\u7ebf\u7a0b\u65e0\u8111\u91cd\u5efa\u7f13\u5b58\uff0c\u54ea\u6015\u7f13\u5b58\u5df2\u7ecf\u662f\u6b63\u786e\u7684\u4e86\n            CACHE_REBUILD_EXECUTOR.submit(()-&gt; {\n                try {\n                    \/\/\/\u91cd\u5efa\u7f13\u5b58I\n                    this.saveShop2Redis(id, 20L);\n                } catch (Exception e) {\n                    throw new RuntimeException(e);\n                } finally {\n                    \/\/\u91ca\u653e\u9501\n                    unlock(lockKey);\n                }\n            });\n        }\n        \/\/6.4.\u8fd4\u56de\u8fc7\u671f\u7684\u5546\u94fa\u4fe1\u606f\n        return shop;\n    }\n\n    public Shop queryWithMutex(Long id) {\n        String key = CACHE_SHOP_KEY + id;\n        \/\/ 1.\u4eceredis\u67e5\u8be2\u5546\u94fa\u7f13\u5b58\n        String shopJson = stringRedisTemplate.opsForValue().get(key);\n        \/\/ 2.\u5224\u65ad\u662f\u5426\u5b58\u5728\n        if (StrUtil.isNotBlank(shopJson)) {\n            \/\/ 3.\u5b58\u5728\uff0c\u76f4\u63a5\u8fd4\u56de\n            return JSONUtil.toBean(shopJson, Shop.class);\n        }\n        \/\/\u8fd9\u4e2a\u5730\u65b9\u6839\u672c\u4e0d\u7528\u5224\u65ad,\u9664\u975e\u524d\u7aef\u4ee3\u7801\u88ab\u9ed1\u4e86\n        \/\/\u5224\u65ad\u547d\u4e2d\u7684\u662f\u5426\u662f\u7a7a\u503c\n        if (shopJson != null) {\n            \/\/\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u4fe1\u606f\n            return null;\n        }\n\n        \/\/4.\u5b9e\u73b0\u7f13\u5b58\u91cd\u5efa\n        \/\/4.1.\u83b7\u53d6\u4e92\u65a5\u9501\n        String lockKey = \"lock:shop:\" + id;\n        Shop shop = null;\n        try {\n            boolean isLock = tryLock(lockKey);\n            \/\/4.2.\u5224\u65ad\u662f\u5426\u83b7\u53d6\u6210\u529f\n            if (!isLock) {\n                \/\/4.3.\u5931\u8d25\uff0c\u5219\u4f11\u7720\u5e76\u91cd\u8bd5\n                Thread.sleep(50);\n                return queryWithMutex(id);\n            }\n            \/*\u6ce8\u610f\uff1a\u83b7\u53d6\u9501\u6210\u529f\u5e94\u8be5\u518d\u6b21\u68c0\u6d4bredis \u7f13\u5b58\u662f\u5426\u5b58\u5728\uff0c\u505aDoubleCheck\u3002\u5982\u679c\u5b58\u5728\u5219\u65e0\u9700\u91cd\u5efa\u7f13\u5b58\u3002*\/\n            \/\/\u91cd\u65b0\u628a\u7b2c\u4e00\u6b65\u548c\u7b2c\u4e8c\u6b65\u7684\u4ee3\u7801\u62f7\u8d1d\u4e00\u4e0b\uff0c\u653e\u57284.4\u524d\u9762\u5c31\u884c\n            \/\/ 4.4.success\uff0c\u6839\u636eid\u67e5\u8be2\u6570\u636e\u5e93\n            shop = getById(id);\n            \/\/ 5.\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de\u9519\u8bef\n            if (shop == null) {\n                \/\/\u5c06\u7a7a\u503c\u5199\u5165redis\n                stringRedisTemplate.opsForValue().set(key, \"\", CACHE_NULL_TTL, TimeUnit.MINUTES);\n                return null;\n            }\n            \/\/ 6.\u5b58\u5728\uff0c\u5199\u5165redis\n            stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(shop), CACHE_SHOP_TTL, TimeUnit.MINUTES);\n        } catch (InterruptedException e) {\n            throw new RuntimeException(e);\n        } finally {\n            \/\/ 7.\u91ca\u653e\u4e92\u65a5\u9501\n            unlock(lockKey);\n        }\n        \/\/ 8.\u8fd4\u56de\n        return shop;\n        \/\/\u9ad8\u5e76\u53d1\u7684\u60c5\u51b5\u4e0b\uff0c\u81ea\u65cb\u4f60\u5f97CPU\u8db3\u591f\u591a\uff0c\u5426\u5219\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u4e00\u6837\u4e00\u76f4\u963b\u585e\u3002\n        \/\/\u8fd9\u91cc\u6709\u95ee\u9898\uff0c\u5f53\u4f60\u4f11\u7720\u4e4b\u540e\u82e5\u6ca1\u6709\u4fee\u6539\u5b8c\uff0c\u90a3\u4e48\u4ed6\u5c31\u4f1a\u53bb\u91ca\u653e\u9501\uff0c\u4f46\u662f\u4fee\u6539\u7684\u90a3\u4e2a\u8fd8\u6ca1\u6709\u6539\u5b8c\uff0c\u8fd9\u6837\u4e0d\u5c31\u4f1a\u62a5\u9519\u5417\n        \/\/ \u8fd9\u91cc\u7684finally\u91cc\u7684unlock\u4f1a\u5728\u524d\u9762\u7684return \u9012\u5f52\u524d\u6267\u884c\uff0c\u4e5f\u5c31\u662f\u8bf4\u4f1a\u5148\u91ca\u653e\u9501\n    }\n\n\n    public Shop queryWithPassThrough(Long id) {\n        String key = CACHE_SHOP_KEY + id;\n        \/\/ 1.\u4eceredis\u67e5\u8be2\u5546\u94fa\u7f13\u5b58\n        String shopJson = stringRedisTemplate.opsForValue().get(key);\n        \/\/ 2.\u5224\u65ad\u662f\u5426\u5b58\u5728\n        if (StrUtil.isNotBlank(shopJson)) {\n            \/\/ 3.\u5b58\u5728\uff0c\u76f4\u63a5\u8fd4\u56de\n            Shop shop = JSONUtil.toBean(shopJson, Shop.class);\n            return shop;\n        }\n        \/\/\u8fd9\u4e2a\u5730\u65b9\u6839\u672c\u4e0d\u7528\u5224\u65ad,\u9664\u975e\u524d\u7aef\u4ee3\u7801\u88ab\u9ed1\u4e86\n        \/\/\u5224\u65ad\u547d\u4e2d\u7684\u662f\u5426\u662f\u7a7a\u503c\n        if (shopJson != null) {\n            \/\/\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u4fe1\u606f\n            return null;\n        }\n        \/\/ 4.\u4e0d\u5b58\u5728\uff0c\u6839\u636eid\u67e5\u8be2\u6570\u636e\u5e93\n        Shop shop = getById(id);\n        \/\/ 5.\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de\u9519\u8bef\n        if (shop == null) {\n            \/\/\u5c06\u7a7a\u503c\u5199\u5165redis\n            stringRedisTemplate.opsForValue().set(key, \"\", CACHE_NULL_TTL, TimeUnit.MINUTES);\n            return null;\n        }\n        \/\/ 6.\u5b58\u5728\uff0c\u5199\u5165redis\n        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(shop), CACHE_SHOP_TTL, TimeUnit.MINUTES);\n        \/\/ 7.\u8fd4\u56de\n        return shop;\n    }\n\n    private boolean tryLock(String key) {\n        Boolean flag = stringRedisTemplate.opsForValue().setIfAbsent(key, \"\", CACHE_NULL_TTL, TimeUnit.SECONDS);\n        return BooleanUtil.isTrue(flag);    \/\/\u62c6\u7bb1\u5e95\u5c42\u5c31\u662f\u8c03\u7528booleanValue()\u65b9\u6cd5\uff0c\u5982\u679cflag\u4e3anull\u7684\u8bdd\u5c31\u4f1a\u7a7a\u6307\u9488\u5f02\u5e38\uff0c\u81ea\u52a8\u62c6\u7bb1\u4f1a\u51fa\u73b0\u7a7a\u6307\u9488\n    }\n\n    private void unlock(String key) {\n        stringRedisTemplate.delete(key);\n    }\n\n    public void saveShop2Redis(Long id, Long expireSeconds){\n    \/\/1.\u67e5\u8be2\u5e97\u94fa\u6570\u636e\n    Shop shop = getById(id);\n    \/\/2.\u5c01\u88c5\u903b\u8f91\u8fc7\u671f\u65f6\u95f4\n    RedisData redisData = new RedisData();\n    redisData.setData(shop);\n    redisData.setExpireTime(LocalDateTime.now().\n\n    plusSeconds(expireSeconds));\n    \/\/3.\u5199\u5165Redis\n    stringRedisTemplate.opsForValue().set(CACHE_SHOP_KEY+id, JSONUtil.toJsonStr(redisData));\n}\n    @Override\n    @Transactional\n    public Result update(Shop shop) {\n        Long id =shop.getId();\n        if(id==null){\n            return Result.fail(\"\u5e97\u94faid\u4e0d\u80fd\u4e3a\u7a7a\uff01\");\n        }\n        updateById(shop);\n        stringRedisTemplate.delete(CACHE_SHOP_KEY+id);\n        return Result.ok();\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u5982\u679c\u7f13\u5b58\u4e2d\u6ca1\u6709\u5c31\u4e00\u76f4\u8fd4\u56de\u4e0d\u5b58\u5728\uff0c\u73b0\u5728redis\u4e2d\u7684\u662f103\u9910\u5385\uff0c\u6211\u4eec\u4fee\u6539sql\uff0c\u6539\u6210101<img loading=\"lazy\" decoding=\"async\" height=\"107\" width=\"292\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/abdcb08980e94fdb8daad7a863ee36e8.png\" alt=\"\"><img loading=\"lazy\" decoding=\"async\" height=\"74\" width=\"327\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/cfc42a84f488478bba1ae2758d17bb86.png\" alt=\"\"><\/p>\n\n\n\n<p>&nbsp;jmeter\u8bbe\u7f6e\u6210100\u8bf7\u6c42\u57281s\u5185\u5b8c\u6210\u3002\u5982\u671f\u4fee\u6539<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"65\" width=\"274\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/8280441d970f49be9920496fdb5ca0b7.png\" alt=\"\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">&nbsp;\u7f13\u5b58\u5de5\u5177\u5c01\u88c5<\/h3>\n\n\n\n<p>\u57fa\u4e8eStringRedisTemplate\u5c01\u88c5\u4e00\u4e2a\u7f13\u5b58\u5de5\u5177\u7c7b\uff0c\u6ee1\u8db3\u4e0b\u5217\u9700\u6c42\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b9\u6cd51\uff1a\u5c06\u4efb\u610fJava\u5bf9\u8c61\u5e8f\u5217\u5316\u4e3ajson\u5e76\u5b58\u50a8\u5728string\u7c7b\u578b\u7684key\u4e2d\uff0c\u5e76\u4e14\u53ef\u4ee5\u8bbe\u7f6eTTL\u8fc7\u671f\u65f6\u95f4<\/li>\n\n\n\n<li>\u65b9\u6cd52\uff1a\u5c06\u4efb\u610fJava\u5bf9\u8c61\u5e8f\u5217\u5316\u4e3ajson\u5e76\u5b58\u50a8\u5728string\u7c7b\u578b\u7684key\u4e2d\uff0c\u5e76\u4e14\u53ef\u4ee5\u8bbe\u7f6e\u903b\u8f91\u8fc7\u671f\u65f6\u95f4\uff0c\u7528\u4e8e\u5904\u7406\u7f13\u5b58\u51fb\u7a7f\u95ee\u9898<\/li>\n\n\n\n<li>\u65b9\u6cd53\uff1a\u6839\u636e\u6307\u5b9a\u7684key\u67e5\u8be2\u7f13\u5b58\uff0c\u5e76\u53cd\u5e8f\u5217\u5316\u4e3a\u6307\u5b9a\u7c7b\u578b\uff0c\u5229\u7528\u7f13\u5b58\u7a7a\u503c\u7684\u65b9\u5f0f\u89e3\u51b3\u7f13\u5b58\u7a7f\u900f\u95ee\u9898<\/li>\n\n\n\n<li>\u65b9\u6cd54\uff1a\u6839\u636e\u6307\u5b9a\u7684key\u67e5\u8be2\u7f13\u5b58\uff0c\u5e76\u53cd\u5e8f\u5217\u5316\u4e3a\u6307\u5b9a\u7c7b\u578b\uff0c\u9700\u8981\u5229\u7528\u903b\u8f91\u8fc7\u671f\u89e3\u51b3\u7f13\u5b58\u51fb\u7a7f\u95ee\u9898<\/li>\n<\/ul>\n\n\n\n<p>&nbsp;\u5728utils\u4e2d\u65b0\u5efacacheclient<\/p>\n\n\n\n<p>\u6cdb\u578b\u51fa\u9519\u4f1a\u5728\u7f16\u8bd1\u5668\u62a5\u9519\uff0cobject\u51fa\u9519\u5c31\u662f\u8fd0\u884c\u65f6\u5f02\u5e38\u4e86<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.hmdp.utils;\n\nimport cn.hutool.core.util.StrUtil;\nimport cn.hutool.json.JSONUtil;\nimport io.lettuce.core.GeoArgs;\nimport lombok.extern.slf4j.Slf4j;\nimport org.springframework.data.redis.core.StringRedisTemplate;\nimport org.springframework.stereotype.Component;\n\nimport java.time.LocalDateTime;\nimport java.util.concurrent.TimeUnit;\nimport java.util.function.Function;\n\nimport static com.hmdp.utils.RedisConstants.CACHE_NULL_TTL;\n\n@Slf4j\n@Component\npublic class CacheClient {\n    private final StringRedisTemplate stringRedisTemplate;\n    public CacheClient(StringRedisTemplate stringRedisTemplate) {\n        this.stringRedisTemplate = stringRedisTemplate;\n    }\n    public void set(String key, Object value, Long time, TimeUnit unit) {\n        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(value), time, unit);\n    }\n    public void setWithLogicalExpire(String key, Object value, Long time, TimeUnit unit){\n        \/\/\u8bbe\u7f6e\u903b\u8f91\u8fc7\u671f\n        RedisData redisData = new RedisData();\n        redisData.setData(value);\n        redisData.setExpireTime(LocalDateTime.now().plusSeconds(unit.toSeconds(time)));\n        \/\/\u5199\u5165Redis\n        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(value));\n    }\n\n    public &lt;R, ID&gt; R queryWithPassThrough(String keyPrefix, ID id , Class&lt;R&gt; type, Function&lt;ID,R&gt; dbFallback,Long time, TimeUnit unit) {\n        String key = keyPrefix + id;\n        \/\/1.\u4eceredis\u67e5\u8be2\u5546\u94fa\u7f13\u5b58\n        String json = stringRedisTemplate.opsForValue().get(key);\n        \/\/2.\u5224\u65ad\u662f\u5426\u5b58\u5728\n        if (StrUtil.isNotBlank(json))\n            \/\/3.\u5b58\u5728\uff0c\u76f4\u63a5\u8fd4\u56de\n            return JSONUtil.toBean(json, type);\n        \/\/\u5224\u65ad\u547d\u4e2d\u7684\u662f\u5426\u662f\u7a7a\u503c\n        if(json !=null){\n           \/\/\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u4fe1\u606f\n            return null;\n        }\n        \/\/4.\u4e0d\u5b58\u5728\uff0c\u6839\u636eid\u67e5\u8be2\u6570\u636e\u5e93\n        R r= dbFallback.apply(id);\n        \/\/5.\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de\u9519\u8bef\n        if(r== null) {\n            \/\/\u5c06\u7a7a\u503c\u5199\u5165redis\n            stringRedisTemplate.opsForValue().set(key, \"\", CACHE_NULL_TTL, TimeUnit.MINUTES);\n            \/\/\u8fd4\u56de\u9519\u8bef\u4fe1\u606f\n            return null;\n        }\n        \/\/6.\u5b58\u5728\uff0c\u5199\u5165redis\n        this.set(key,r, time, unit);\n        return r;\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u4fee\u6539shopserviceimpl<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    @Override\n    public Result queryById(Long id) {\n\n       \/\/\u89e3\u51b3\u7f13\u5b58\u7a7f\u900f\n        Shop shop = cacheClient.queryWithPassThrough(CACHE_SHOP_KEY,id,Shop.class,this::getById,CACHE_SHOP_TTL,TimeUnit.MINUTES);\n        if (shop == null) {\n            return Result.fail(\"\u5e97\u94fa\u4e0d\u5b58\u5728\uff01\");\n        }\n        \/\/7.\u8fd4\u56de\n        return Result.ok(shop);\n\n    }\n\n\u628aqueryWithMutex\u6ce8\u91ca\u6389<\/code><\/pre>\n\n\n\n<p>\u8fdb\u4e00\u6b65\u96c6\u5408 CacheClient<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.hmdp.utils;\n\nimport cn.hutool.core.util.BooleanUtil;\nimport cn.hutool.core.util.StrUtil;\nimport cn.hutool.json.JSONObject;\nimport cn.hutool.json.JSONUtil;\nimport io.lettuce.core.GeoArgs;\nimport lombok.extern.slf4j.Slf4j;\nimport org.springframework.data.redis.core.StringRedisTemplate;\nimport org.springframework.stereotype.Component;\n\nimport java.time.LocalDateTime;\nimport java.util.concurrent.ExecutorService;\nimport java.util.concurrent.Executors;\nimport java.util.concurrent.TimeUnit;\nimport java.util.function.Function;\n\nimport static com.hmdp.utils.RedisConstants.CACHE_NULL_TTL;\nimport static com.hmdp.utils.RedisConstants.LOCK_SHOP_KEY;\n\n@Slf4j\n@Component\npublic class CacheClient {\n    private final StringRedisTemplate stringRedisTemplate;\n    public CacheClient(StringRedisTemplate stringRedisTemplate) {\n        this.stringRedisTemplate = stringRedisTemplate;\n    }\n    public void set(String key, Object value, Long time, TimeUnit unit) {\n        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(value), time, unit);\n    }\n    public void setWithLogicalExpire(String key, Object value, Long time, TimeUnit unit){\n        \/\/\u8bbe\u7f6e\u903b\u8f91\u8fc7\u671f\n        RedisData redisData = new RedisData();\n        redisData.setData(value);\n        redisData.setExpireTime(LocalDateTime.now().plusSeconds(unit.toSeconds(time)));\n        \/\/\u5199\u5165Redis\n        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(redisData));\n    }\n\n    public &lt;R, ID&gt; R queryWithPassThrough(String keyPrefix, ID id , Class&lt;R&gt; type, Function&lt;ID,R&gt; dbFallback,Long time, TimeUnit unit) {\n        String key = keyPrefix + id;\n        \/\/1.\u4eceredis\u67e5\u8be2\u5546\u94fa\u7f13\u5b58\n        String json = stringRedisTemplate.opsForValue().get(key);\n        \/\/2.\u5224\u65ad\u662f\u5426\u5b58\u5728\n        if (StrUtil.isNotBlank(json))\n            \/\/3.\u5b58\u5728\uff0c\u76f4\u63a5\u8fd4\u56de\n            return JSONUtil.toBean(json, type);\n        \/\/\u5224\u65ad\u547d\u4e2d\u7684\u662f\u5426\u662f\u7a7a\u503c\n        if(json !=null){\n           \/\/\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u4fe1\u606f\n            return null;\n        }\n        \/\/4.\u4e0d\u5b58\u5728\uff0c\u6839\u636eid\u67e5\u8be2\u6570\u636e\u5e93\n        R r= dbFallback.apply(id);\n        \/\/5.\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de\u9519\u8bef\n        if(r== null) {\n            \/\/\u5c06\u7a7a\u503c\u5199\u5165redis\n            stringRedisTemplate.opsForValue().set(key, \"\", CACHE_NULL_TTL, TimeUnit.MINUTES);\n            \/\/\u8fd4\u56de\u9519\u8bef\u4fe1\u606f\n            return null;\n        }\n        \/\/6.\u5b58\u5728\uff0c\u5199\u5165redis\n        this.set(key,r, time, unit);\n        return r;\n    }\n\n    private static final ExecutorService CACHE_REBUILD_EXECUTOR= Executors.newCachedThreadPool();\n    public &lt;R, ID&gt; R queryWithLogicalExpire(String keyPrefix, ID id, Class&lt;R&gt; type, Function&lt;ID, R&gt; dbFallback,Long time, TimeUnit unit) {\n        String key = keyPrefix + id;\n        \/\/ 1.\u4eceRedis\u67e5\u8be2\u5546\u94fa\u7f13\u5b58\n        String json = stringRedisTemplate.opsForValue().get(key);\n        \/\/ 2.\u5224\u65ad\u662f\u5426\u5b58\u5728\n        if (StrUtil.isBlank(json)) {\n            \/\/ 3.\u5b58\u5728\uff0c\u76f4\u63a5\u8fd4\u56de\n            return null;\n        }\n        \/\/ \u4eceRedis\u4e2d\uff0c\u9700\u8981\u5148\u628ajson\u53cd\u5e8f\u5217\u5316\u4e3a\u5bf9\u8c61\n        RedisData redisData = JSONUtil.toBean(json, RedisData.class);\n        R r = JSONUtil.toBean((JSONObject) redisData.getData(), type);\n        LocalDateTime expireTime = redisData.getExpireTime();\n\n        \/\/5.\u5224\u65ad\u662f\u5426\u8fc7\u671f\n        if(expireTime.isAfter(LocalDateTime.now())){\n            \/\/5.1.\u672a\u8fc7\u671f\uff0c\u76f4\u63a5\u8fd4\u56de\u5e97\u94fa\u4fe1\u606f\n            return r;\n        }\n        \/\/5.2.\u5df2\u8fc7\u671f\uff0c\u9700\u8981\u7f13\u5b58\u91cd\u5efa\n        \/\/6.\u7f13\u5b58\u91cd\u5efa\n        \/\/6.1.\u83b7\u53d6\u4e92\u65a5\u9501\n        String lockKey = LOCK_SHOP_KEY + id;\n        boolean isLock = tryLock(lockKey);\n        \/\/6.2.\u5224\u65ad\u662f\u5426\u83b7\u53d6\u9501\u6210\u529f\n        if(isLock){\n            \/\/6.3.\u6210\u529f\u3002\u5f00\u542f\u72ec\u7acb\u7ebf\u7a0b\uff0c\u5b9e\u73b0\u7f13\u5b58\u91cd\u5efa\n            CACHE_REBUILD_EXECUTOR.submit(() -&gt; {\n                try {\n                    \/\/\u67e5\u8be2\u6570\u636e\u5e93\n                    R r1 =dbFallback.apply(id);\n                    \/\/\u5199\u5165redis\n                    this.setWithLogicalExpire(key,r1,time,unit);\n                } catch (Exception e) {\n                    throw new RuntimeException(e);\n                } finally {\n                    \/\/\u91ca\u653e\u9501\n                    unlock(lockKey);\n                }\n            });\n        }\n        \/\/6.4.\u8fd4\u56de\u8fc7\u671f\u7684\u5546\u94fa\u4fe1\u606f\n        return r;\n    }\n    private boolean tryLock(String key) {\n        Boolean flag = stringRedisTemplate.opsForValue().setIfAbsent(key, \"\", CACHE_NULL_TTL, TimeUnit.SECONDS);\n        return BooleanUtil.isTrue(flag);    \/\/\u62c6\u7bb1\u5e95\u5c42\u5c31\u662f\u8c03\u7528booleanValue()\u65b9\u6cd5\uff0c\u5982\u679cflag\u4e3anull\u7684\u8bdd\u5c31\u4f1a\u7a7a\u6307\u9488\u5f02\u5e38\uff0c\u81ea\u52a8\u62c6\u7bb1\u4f1a\u51fa\u73b0\u7a7a\u6307\u9488\n    }\n\n    private void unlock(String key) {\n        stringRedisTemplate.delete(key);\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u4fee\u6539HmDianPingApplicationTests.java&nbsp;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.hmdp;\n\nimport com.hmdp.entity.Shop;\nimport com.hmdp.service.impl.ShopServiceImpl;\nimport com.hmdp.utils.CacheClient;\nimport org.junit.jupiter.api.Test;\nimport org.springframework.boot.test.context.SpringBootTest;\nimport org.springframework.cache.CacheManager;\nimport org.springframework.data.redis.core.RedisTemplate;\n\nimport javax.annotation.Resource;\nimport java.util.concurrent.TimeUnit;\n\nimport static com.hmdp.utils.RedisConstants.CACHE_SHOP_KEY;\n\n@SpringBootTest\nclass HmDianPingApplicationTests {\n\n    @Resource\n    private ShopServiceImpl shopService;\n\n    @Resource\n    private CacheClient cacheClient;\n\n    @Test\n      void testSaveShop()throws InterruptedException {\n        Shop shop= shopService.getById(1L);\n        cacheClient.setWithLogicalExpire(CACHE_SHOP_KEY+1L,shop, 10L,TimeUnit.SECONDS);\n    }\n\n}\n<\/code><\/pre>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"113\" width=\"324\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/52074f1c567d4dc6b84b7f7f818458c9.png\" 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said read rush through\u548crebe\u5443\uff0c\u8fd9\u4e09\u79cd\u65b9\u6848\u5462\u540e\u4e24\u79cd\u867d\u7136\u90fd\u633a\u4f18\u79c0\u7684\uff0c\u4f46\u662f\u5b9e\u73b0\u8d77\u6765\u76f8\u5bf9\u6bd4\u8f83\u590d\u6742\uff0c\u800c\u4e14\u5462\u6700\u540e\u4e00\u79cdwrite back\u5462\u5b83\u7684\u4e00\u81f4\u6027\u8fd8\u6bd4\u8f83\u5dee\uff0c\u6240\u4ee5\u8bf4\u5462\u6211\u4eec\u4e00\u822c\u5462\u6ca1\u6709\u9009\u62e9\u540e\u4e24\u79cd\uff0c\u90fd\u662f\u9009\u62e9\u7b2c\u4e00\u79cdcatch set\uff0c\u90a3\u4e2acch 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