{"id":201228,"date":"2025-05-10T10:44:14","date_gmt":"2025-05-10T02:44:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201228\/"},"modified":"2025-05-10T10:44:14","modified_gmt":"2025-05-10T02:44:14","slug":"redis%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e9%98%b2%e6%ad%a2%e7%bc%93%e5%ad%98%e5%87%bb%e7%a9%bf%e7%9a%84%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201228\/","title":{"rendered":"Redis\u5206\u5e03\u5f0f\u9501\u9632\u6b62\u7f13\u5b58\u51fb\u7a7f\u7684\u5b9e\u73b0"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u5206\u5e03\u5f0f\u9501\u9632\u6b62\u7f13\u5b58\u51fb\u7a7f\u7684\u5b9e\u73b0<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> 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style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248261963b00f3bc1443.jpg\" class=\"aligncenter\"><\/p>\n<p>\u89e3\u51b3\u65b9\u6848\uff1a<strong>DB\u67e5\u8be2\u52a0\u5206\u5e03\u5f0f\u9501<\/strong>\u3002<\/p>\n<h2>\u672a\u52a0\u9501\u7684\u60c5\u51b5<\/h2>\n<p>\u89e3\u51b3\u95ee\u9898\u4e4b\u524d\uff0c\u5148\u770b\u4e00\u4e0b\u4e0d\u505a\u5904\u7406\u7684\u4ee3\u7801\u548c\u8fd0\u884c\u60c5\u51b5\u3002<\/p>\n<p><strong>\u6839\u636e\u5546\u54c1ID\u67e5\u8be2\u5546\u54c1\u8be6\u60c5\u4ee3\u7801<\/strong><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248262063b00f3c2666a.jpg\" class=\"aligncenter\"><\/p>\n<p>\u6e05\u7a7aRedis\u7f13\u5b58\uff0c\u5f00\u542f5\u4e2a\u7ebf\u7a0b\u53bb\u5e76\u53d1\u8bbf\u95ee\u6d4b\u8bd5\uff0c\u6d4b\u8bd5\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248262063b00f3c83fb8.jpg\" class=\"aligncenter\"><\/p>\n<p>\u6211\u4eec\u9884\u671f\u5e0c\u671bDB\u53ea\u67e5\u8be2\u4e00\u6b21\uff0c\u540e\u97624\u4e2a\u67e5\u8be2\u4eceRedis\u7f13\u5b58\u4e2d\u53d6\u5c31\u884c\uff0c\u4f46\u662f\u7ed3\u679c\uff1a<br \/><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248262063b00f3ce10ad.jpg\" class=\"aligncenter\"><br \/>\u6ca1\u6709\u52a0\u5206\u5e03\u5f0f\u9501\uff0c\u7ed3\u679c\u4e5f\u5728\u610f\u6599\u4e4b\u4e2d\uff0c\u4f46\u662f\u8fd9\u6837\u5bb9\u5668\u7ed9DB\u9020\u6210\u5f88\u5927\u538b\u529b\u3002<\/p>\n<p><strong>\u5982\u679c\u662f\u5355\u53f0\u670d\u52a1\u5668\uff0c\u76f4\u63a5\u4f7f\u7528Java\u7684\u540c\u6b65\u9501\u5373\u53ef<\/strong><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248262163b00f3d5af3a.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u9057\u61be\u7684\u662f\uff0c\u901a\u5e38\u540e\u7aef\u662f\u4f1a\u90e8\u7f72\u96c6\u7fa4\u7684\uff0cJava\u7684\u540c\u6b65\u9501\u53ef\u6ca1\u529e\u6cd5\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u3002<\/strong><\/p>\n<p>Redis\u5206\u5e03\u5f0f\u9501\u89e3\u51b3\u7f13\u5b58\u51fb\u7a7f<\/p>\n<p>Java\u7684\u5185\u7f6e\u9501\u53ea\u80fd\u5e94\u7528\u5728\u5355\u53f0\u673a\u5668\u4e0a\uff0c\u65e0\u6cd5\u5b9e\u73b0\u5206\u5e03\u5f0f\uff0c<strong>\u53ef\u4ee5\u5de7\u7528Redis\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/strong>\u3002<\/p>\n<p><strong>\u52a0\u4e86\u5206\u5e03\u5f0f\u9501\u540e\u7684\u4ee3\u7801<\/strong><\/p>\n<pre>\/\/\u6839\u636eID\u67e5\u8be2\u5546\u54c1\n@GetMapping(\"\/{id}\")\npublic R id(@PathVariable String id){\n\t\/\/\u5148\u67e5Redis\u7f13\u5b58\n\tObject o = redisTemplate.opsForValue().get(id);\n\tif (o != null) {\n\t\t\/\/\u547d\u4e2d\u7f13\u5b58\n\t\tSystem.err.println(\"id:\"+id+\",\u547d\u4e2dredis\u7f13\u5b58...\");\n\t\treturn R.success(o);\n\t}\n\n\t\/\/\u7f13\u5b58\u672a\u547d\u4e2d \u67e5\u8be2\u6570\u636e\u5e93\n\tString lockKey = \"lock\" + id;\n\t\/\/\u52a0\u9501\uff0c10s\u540e\u8fc7\u671f\n\tfor (;;) {\n\t\tif (redisTemplate.opsForValue().setIfAbsent(lockKey, System.currentTimeMillis(), 10L, TimeUnit.SECONDS)) {\n\t\t\t\/\/\u52a0\u9501\u6210\u529f\u7684\u7ebf\u7a0b,\u518d\u6b21\u68c0\u67e5\n\t\t\to = redisTemplate.opsForValue().get(id);\n\t\t\tif (o != null) {\n\t\t\t\t\/\/\u547d\u4e2d\u7f13\u5b58\n\t\t\t\tSystem.err.println(\"Thread:\" + Thread.currentThread().getName() + \",id:\"+id+\",\u547d\u4e2dredis\u7f13\u5b58...\");\n\t\t\t\t\/\/\u91ca\u653e\u9501\n\t\t\t\tredisTemplate.delete(lockKey);\n\t\t\t\treturn R.success(o);\n\t\t\t}\n\n\t\t\t\/\/\u4ecd\u672a\u547d\u4e2d\n\t\t\tSystem.err.println(\"Thread:\" + Thread.currentThread().getName() + \",id:\" + id + \",\u67e5\u8be2DB...\");\n\t\t\tGoods goods = goodsMapper.selectById(id);\n\t\t\t\/\/\u7ed3\u679c\u5b58\u5165Redis\n\t\t\tredisTemplate.opsForValue().set(id, goods);\n\t\t\t\/\/\u91ca\u653e\u9501\n\t\t\tredisTemplate.delete(lockKey);\n\t\t\treturn R.success(goods);\n\t\t}\n\t\t\/\/\u7ade\u4e89\u4e0d\u5230\u9501\uff0c\u6682\u65f6\u8ba9\u51faCPU\u8d44\u6e90\n\t\tThread.yield();\n\t}\n}\n<\/pre>\n<p><strong>\u542f\u52a85\u4e2a\u7ebf\u7a0b\uff0c\u5e76\u53d1\u8bbf\u95ee\uff0c\u7ed3\u679c\u5982\u4e0b\u56fe\uff1a<\/strong><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248262163b00f3db8b52.jpg\" 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