{"id":201814,"date":"2025-05-10T12:57:49","date_gmt":"2025-05-10T04:57:49","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201814\/"},"modified":"2025-05-10T12:57:49","modified_gmt":"2025-05-10T04:57:49","slug":"redis%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e8%a7%a3%e5%86%b3%e7%bc%93%e5%ad%98%e5%8f%8c%e5%86%99%e4%b8%80%e8%87%b4%e6%80%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201814\/","title":{"rendered":"redis\u5206\u5e03\u5f0f\u9501\u89e3\u51b3\u7f13\u5b58\u53cc\u5199\u4e00\u81f4\u6027"},"content":{"rendered":"

<\/b> <\/p>\n

redis\u5206\u5e03\u5f0f\u9501\u89e3\u51b3\u7f13\u5b58\u53cc\u5199\u4e00\u81f4\u6027<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u300aredis\u5206\u5e03\u5f0f\u9501\u89e3\u51b3\u7f13\u5b58\u53cc\u5199\u4e00\u81f4\u6027\u300b\uff0c\u8986\u76d6\u4e86\u6570\u636e\u5e93\u7684\u5e38\u89c1\u57fa\u7840\u77e5\u8bc6\uff0c\u5176\u5b9e\u4e00\u4e2a\u8bed\u8a00\u7684\u5168\u90e8\u77e5\u8bc6\u70b9\u4e00\u7bc7\u6587\u7ae0\u662f\u4e0d\u53ef\u80fd\u8bf4\u5b8c\u7684\uff0c\u4f46\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e9b\u95ee\u9898\uff0c\u8ba9\u8bfb\u8005\u5bf9\u81ea\u5df1\u7684\u638c\u63e1\u7a0b\u5ea6\u6709\u4e00\u5b9a\u7684\u8ba4\u8bc6(B \u6570)\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u66f4\u597d\u7684\u638c\u63e1\u5b83\u3002<\/p>\n

\u5982\u4f55\u89e3\u51b3\u7f13\u5b58\u53cc\u5199\u95ee\u9898<\/h2>\n

\u53ea\u8981\u6d89\u53ca\u5230\u7f13\u5b58\uff0c\u90a3\u4e48\u7f13\u5b58\u53cc\u5199\u7684\u95ee\u9898\u5c31\u907f\u514d\u4e0d\u4e86\uff0c\u6bcf\u4e00\u79cd\u60c5\u51b5\u4e0b\u4f7f\u7528\u7684\u65b9\u6848\u4e5f\u4e0d\u76f8\u540c\uff0c\u5bf9\u4e8e\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u573a\u666f\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5ef6\u65f6\u53cc\u5220<\/strong>\u7b49\u65b9\u6848\u6765\u5b9e\u73b0\uff0c\u800c\u5bf9\u4e8e\u4e00\u81f4\u6027\u8981\u6c42\u5f88\u9ad8\u7684\u573a\u666f\uff0c\u5728\u4e4b\u524d\u67e5\u627e\u7684\u8d44\u6599\u90fd\u662f\u57fa\u4e8e\u961f\u5217\u6765\u5b9e\u73b0\uff0c\u4e5f\u5c31\u662f\u6240\u6709\u7684\u8bf7\u6c42\u90fd\u8fdb\u5165\u4e00\u4e2a\u961f\u5217\uff0c\u4f46\u662f\u5b9e\u73b0\u8d77\u6765\u76f8\u5bf9\u6765\u8bf4\u6bd4\u8f83\u590d\u6742\u3002\u4eca\u5929\u5c31\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u6765\u5b9e\u73b0<\/p>\n

\u4e1a\u52a1\u80cc\u666f-\u7f8e\u98df\u5206\u4eab<\/h2>\n

1: \u73b0\u5728\u6709\u4e00\u4e2a\u5f88\u706b\u7684\u7f8e\u98df\u535a\u4e3b\u5206\u4eab\u4e86\u4e00\u7bc7\u7f8e\u98df\uff0c\u6b64\u523b\u662f\u5f88\u591a\u4eba\u90fd\u4f1a\u6765\u67e5\u770b\uff0c\u5bf9\u4e8e\u7f8e\u98df\u5206\u4eab\u662f\u5178\u578b\u7684\u8bfb\u591a\u5199\u5c11<\/strong>\u7684\u573a\u666f\uff0c\u53ef\u4ee5\u5229\u7528\u7f13\u5b58<\/p>\n

\/\/\u6839\u636eid\u67e5\u8be2\u7f8e\u98df\u4fe1\u606f  \npublic GoodsVO loadGoodsInfoById(Long id) {\n  \/\/\u4eceredis\u4e2d\u62ff\u7528\u6237\u4fe1\u606f\n  Object obj = redisTemplate.opsForValue().get(GOODS_KEY + id);\n  if(obj == null) {\n      \/\/\u5982\u679credis\u4e2d\u4e0d\u5b58\u5728\uff0c\u5c31\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\n      GoodsVO goods = loadGoodsFromDb(id);\n      \/\/\u5c06\u7ed3\u679c\u4fdd\u5b58\u5230redis\u4e2d\n      redisTemplate.opsForValue().set(GOODS_KEY+id,JSONUtil.toJsonPrettyStr(goods));\n      return fileUser;\n  }\n  return JSONUtil.toBean(obj.toString(), GoodsVO.class);\n}<\/pre>\n
\/\/\u7f16\u8f91\u7f8e\u98df\u4fe1\u606f\npublic void modifyGoodsById(GoodsVO goodsVO) throws Exception{\n    \/\/\u5220\u9664\u7f13\u5b58\n    redisTemplate.delete(GOODS_KEY + goodsVO.getId());\n    \/\/\u66f4\u65b0\u7528\u6237\u4fe1\u606f\n    goodsMapper.updateById(goodsVO);\n    \/\/\u5220\u9664\u7f13\u5b58\n    Thread.sleep(1000);\n    redisTemplate.delete(GOODS_KEY + goodsVO.getId());\n}<\/pre>\n
\u800c\u5bf9\u4e8e\u66f4\u65b0\u6570\u636e\u7684\u65f6\u5019\u662f\u5148\u66f4\u65b0\u7f13\u5b58\u8fd8\u662f\u5148\u66f4\u65b0\u6570\u636e\u5e93\u5462\uff1f<\/p>\n
1:\u5148\u66f4\u65b0\u7f13\u5b58\u518d\u66f4\u65b0\u6570\u636e\u5e93<\/p>\n
    \n
  • \u5982\u679c\u66f4\u65b0\u7f13\u5b58\u6210\u529f\uff0c\u66f4\u65b0\u6570\u636e\u5e93\u5931\u8d25\uff0c\u90a3\u4e48\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u5c31\u662f\u810f\u6570\u636e\uff0c\u4e0e\u6570\u636e\u5e93\u6570\u636e\u4e0d\u4e00\u81f4<\/li>\n<\/ul>\n
    2:\u5148\u66f4\u65b0\u6570\u636e\u5e93\u518d\u66f4\u65b0\u7f13\u5b58<\/p>\n
      \n
    • \u66f4\u65b0\u6570\u636e\u5e93\u6210\u529f\uff0c\u4f46\u662f\u6b64\u65f6\u66f4\u65b0\u7f13\u5b58\u5931\u8d25\uff0c\u90a3\u4e48\u7f13\u5b58\u4e2d\u7684\u8fd8\u662f\u810f\u6570\u636e\uff0c\u4e0e\u6570\u636e\u5e93\u6570\u636e\u4e0d\u4e00\u81f4<\/li>\n<\/ul>\n
      3:\u5ef6\u65f6\u53cc\u5220 – \u5148\u5220\u9664\u7f13\u5b58\uff0c\u518d\u66f4\u65b0\u6570\u636e\u5e93\uff0c\u6700\u540e\u518d\u5220\u9664\u7f13\u5b58<\/p>\n
        \n
      • \u5373\u4f7f\u7b2c\u4e00\u6b21\u5220\u9664\u7f13\u5b58\u5931\u8d25\u4e86\uff0c\u540e\u7eed\u7684\u66f4\u65b0\u6570\u636e\u5e93\u64cd\u4f5c\u4e5f\u4e0d\u4f1a\u6267\u884c\uff0c\u6b64\u65f6\u6765\u8bfb\u53d6\u7684\u7ebf\u7a0b\u53d1\u73b0\u7f13\u5b58\u4e2d\u6ca1\u6709\u6570\u636e\uff0c\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\u6700\u65b0\u7684\u3002<\/li>\n
      • \u7b2c\u4e00\u6b21\u5220\u9664\u7f13\u5b58\u6210\u529f\uff0c\u66f4\u65b0\u6570\u636e\u5e93\u5931\u8d25\uff0c\u6b64\u65f6\u6765\u8bfb\u53d6\u7684\u7ebf\u7a0b\u53d1\u73b0\u7f13\u5b58\u4e2d\u6ca1\u6709\u6570\u636e\uff0c\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\u6700\u65b0\u7684\u3002<\/li>\n
      • \u7b2c\u4e00\u6b21\u5220\u9664\u7f13\u5b58\u6210\u529f\uff0c\u66f4\u65b0\u6570\u636e\u5e93\u6210\u529f\uff0c\u7b2c\u4e8c\u6b21\u5220\u9664\u7f13\u5b58\u6210\u529f\uff0c\u90a3\u4e48\u6765\u8bfb\u53d6\u7684\u7ebf\u7a0b\u53d1\u73b0\u7f13\u5b58\u4e2d\u6ca1\u6709\u6570\u636e\uff0c\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\u6700\u65b0\u7684\u3002<\/li>\n
      • \u7b2c\u4e00\u6b21\u5220\u9664\u9664\u7f13\u5b58\u6210\u529f\uff0c\u66f4\u65b0\u6570\u636e\u5e93\u6210\u529f\uff0c\u7b2c\u4e8c\u6b21\u5220\u9664\u7f13\u5b58\u5931\u8d25\uff0c\u8fd9\u65f6\u5019\u5c31\u4f1a\u6709\u95ee\u9898\u4e86<\/li>\n<\/ul>\n
        <\/p>\n
        \u95ee\u9898\u4e00\uff1aThread-A\u7b2c\u4e00\u6b21\u5220\u9664\u7f13\u5b58\u6210\u529f\uff0c\u7136\u540e\u66f4\u65b0\u6570\u636e\uff0c\u4f46\u662f\u8fd9\u65f6\u5019\u4e0d\u77e5\u9053\u600e\u4e48\u4e86\uff0c\u53ef\u80fd\u662f\u7ebf\u7a0b\u963b\u585e\u4e86\u6216\u8005\u5176\u5b83\u539f\u56e0\uff0c\u5bfc\u81f4\u8fd8\u6ca1\u6709\u5f00\u59cb\u66f4\u65b0\u6570\u636e\u5e93\uff0c\u8fd9\u65f6\u5019\u53e6\u5916\u4e00\u4e2a\u7ebf\u7a0bThread-B\u6765\u8bfb\u53d6\u6570\u636e\u4e86\uff0c\u8bfb\u53d6\u5230\u6570\u636e\u4e4b\u540e\u5c06\u6570\u636e\u653e\u5230\u7f13\u5b58\u4e2d\uff0c\u8fd9\u65f6\u5019Thread-A\u624d\u5f00\u59cb\u66f4\u65b0\u6570\u636e\u5e93\uff0c\u4f46\u662fThread-A\u5728\u7b2c\u4e8c\u6b21\u5220\u9664\u7f13\u5b58\u7684\u65f6\u5019\u5931\u8d25\u4e86\uff0c\u6b64\u65f6\u5c31\u5bfc\u81f4\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u662f\u4e4b\u524d\u7684\u65e7\u6570\u636e\uff0c\u4e0e\u6570\u636e\u5e93\u7684\u6570\u636e\u4e0d\u4e00\u81f4<\/p>\n
        \u95ee\u9898\u4e8c\uff1a\u5047\u8bbe\u4fee\u6539\u7684\u65f6\u5019\u90fd\u6ca1\u95ee\u9898\uff0c\u7b2c\u4e8c\u6b21\u5220\u9664\u7684\u7f13\u5b58\u7684\u65f6\u5019\u90fd\u6b63\u5e38\uff0c\u8fd9\u65f6\u5019\u8bfb\u53d6\u6570\u636e\u7684\u65f6\u5019\u7f13\u5b58\u91cc\u9762\u80af\u5b9a\u5c31\u6ca1\u6709\u4e86\uff0c\u8fd9\u65f6\u5019\u5c31\u8981\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\uff0c\u5982\u679c\u8fd9\u65f6\u5019\u4e00\u4e0b\u5b50\u5e76\u53d1\u91cf\u5f88\u9ad8\uff0c\u90a3\u4e48\u8fd9\u4e9b\u7ebf\u7a0b\u90fd\u8981\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\uff0c\u8fd9\u65f6\u5019\u6570\u636e\u5e93\u90fd\u6709\u53ef\u80fd\u76f4\u63a5\u6302\u6389<\/p>\n
        \u5206\u5e03\u5f0f\u9501<\/h2>\n
        \u67e5\u8be2<\/h3>\n
        \/\/\u6839\u636eid\u67e5\u8be2\u7f8e\u98df\u4fe1\u606f  \npublic GoodsVO loadGoodsInfoById(Long id) {\n  \/\/\u4eceredis\u4e2d\u62ff\u7528\u6237\u4fe1\u606f\n  Object obj = redisTemplate.opsForValue().get(GOODS_KEY + id);\n  if(obj == null) {\n      \/\/\u5982\u679credis\u4e2d\u4e0d\u5b58\u5728\uff0c\u5c31\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\n      GoodsVO goods = loadGoodsFromDb(id);\n      return fileUser;\n  }\n  return JSONUtil.toBean(obj.toString(), GoodsVO.class);\n}\n\/\/\u67e5\u8be2\u7f13\u5b58\u4e2d\u6ca1\u6709\uff0c\u8fd9\u65f6\u5019\u5c31\u8981\u53bb\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\npublic String getGoodInfoFromDb(Long id) {\n    \/\/\u6b64\u65f6\u8fd9\u91cc\u8981\u52a0\u7684\u9501\u548c modifyGoodsById()\u65b9\u6cd5\u52a0\u7684\u5e94\u8be5\u662f\u540c\u4e00\u628a\u9501\uff0c\u8fd9\u6837\u624d\u80fd\u4fdd\u8bc1\u53cc\u5199\u4e00\u81f4\u6027\n    boolean lock = redisLock.tryLock(GOODS_KEY+id);\n    if(!lock) {\n    \t\/\/\u83b7\u53d6\u9501\u5931\u8d25,\u5c1d\u8bd5\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\n    \tObject obj = redisTemplate.opsForValue().get(GOODS_KEY + id);\n      if(obj != null){\n          return JSONUtil.toBean(obj.toString(), GoodsVO.class);\n      }else{\n          \/\/\u76f4\u63a5\u8fd4\u56de\u4e00\u4e2a\u64cd\u4f5c\u9891\u7e41\u7684\u4fe1\u606f\u7ed9\u524d\u7aef\n          throw new GloableException(\"\u8bbf\u95ee\u9891\u7e41\uff0c\u8bf7\u7a0d\u540e\u518d\u8bd5\");\n      }\n    }\n    try{\n        \/\/\u83b7\u53d6\u5230\u9501\u4e86\n        \/\/\u5c1d\u8bd5\u4ece\u7f13\u5b58\u4e2d\u62ff\n        Object obj = redisTemplate.opsForValue().get(GOODS_KEY + id);\n        if(obj != null) {\n            return JSONUtil.toBean(obj.toString(), GoodsVO.class);\n        }\n        \/\/\u7f13\u5b58\u4e2d\u6ca1\u6709\uff0c\u4eceMySql\u4e2d\u62ff\n        GoodsVO goods = goodsMapper.selectById(id);\n        if(goods == null) {\n            \/\/\u4e3a\u4e86\u89e3\u51b3\u7f13\u5b58\u7a7f\u900f\u7684\u95ee\u9898\n            redisTemplate.opsForValue().set(GOODS_NULL_KEY + id);\n            return null;\n        }\n        \/\/\u5c06\u6570\u636e\u5e93\u67e5\u5230\u7684\u6570\u636e\u653e\u5230\u7f13\u5b58\u4e2d\n        redisTemplate.opsForValue().set(GOODS_KEY+id,JSONUtil.toJsonPrettyStr(goods));\n        return goods;\n    }finally{\n       \/\/\u91ca\u653e\u9501\n       redisLock.unLock(GOODS_KEY+goodsVO.getId());\n    }\n}<\/pre>\n
        \u4fee\u6539<\/h3>\n
        \/\/\u7f16\u8f91\u7f8e\u98df\u4fe1\u606f\npublic void modifyGoodsById(GoodsVO goodsVO) throws Exception{\n    \/\/\u5c1d\u8bd5\u83b7\u53d6\u9501\n    boolean lock = redisLock.tryLock(GOODS_KEY+goodsVO.getId());\n    if(!lock) {\n      \t\/\/\u76f4\u63a5\u8fd4\u56de\u4e00\u4e2a\u64cd\u4f5c\u9891\u7e41\u7684\u4fe1\u606f\u7ed9\u524d\u7aef\n        throw new GloableException(\"\u66f4\u65b0\u6570\u636e\u5931\u8d25,\u8bf7\u7a0d\u540e\u518d\u8bd5.....\");\n    }\n    try{\n        \/\/\u83b7\u53d6\u5230\u9501\u4e86\n        \/\/\u66f4\u65b0\u7528\u6237\u4fe1\u606f\n        goodsMapper.updateById(goodsVO);\n        \/\/\u66f4\u65b0\u5b8c\u4e4b\u540e\uff0c\u5c06\u6570\u636e\u5e93\u6700\u65b0\u7684\u6570\u636e\u66f4\u65b0\u5230\u7f13\u5b58\u4e2d\n        redisTemplate.opsForValue().set(GOODS_KEY+id,JSONUtil.toJsonPrettyStr(goodsVO));\n    }finally{\n        \/\/\u91ca\u653e\u9501\n        redisLock.unLock(GOODS_KEY+goodsVO.getId());\n    }\n}<\/pre>\n
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