{"id":163463,"date":"2024-11-04T23:43:30","date_gmt":"2024-11-04T15:43:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163463\/"},"modified":"2024-11-04T23:43:30","modified_gmt":"2024-11-04T15:43:30","slug":"%e8%a7%a3%e6%b1%baredis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf-%e4%b8%80%e7%af%87%e7%b0%a1%e6%98%8e%e6%95%99%e7%a8%8b%ef%bc%88redis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%e6%95%99%e7%a8%8b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163463\/","title":{"rendered":"\u89e3\u6c7aRedis\u7de9\u5b58\u64ca\u7a7f \u4e00\u7bc7\u7c21\u660e\u6559\u7a0b\uff08redis\u7de9\u5b58\u64ca\u7a7f\u6559\u7a0b\uff09"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%b1%baredis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf-%e4%b8%80%e7%af%87%e7%b0%a1%e6%98%8e%e6%95%99%e7%a8%8b%ef%bc%88redis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%e6%95%99%e7%a8%8b%ef%bc%89-edntPbjlTU\">\u89e3\u6c7aRedis\u7de9\u5b58\u64ca\u7a7f 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id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%ef%bc%9f-edntPbjlTU\">\u4ec0\u9ebc\u662fRedis\u7de9\u5b58\u64ca\u7a7f\uff1f<\/h2>\n<p>Redis\u7de9\u5b58\u64ca\u7a7f\u662f\u6307\u5728\u9ad8\u4f75\u767c\u7684\u60c5\u6cc1\u4e0b\uff0c\u67d0\u500b\u7279\u5b9a\u7684\u7de9\u5b58\u9375\u5931\u6548\uff0c\u5c0e\u81f4\u5927\u91cf\u8acb\u6c42\u76f4\u63a5\u6253\u5230\u5f8c\u7aef\u6578\u64da\u5eab\uff0c\u5f9e\u800c\u9020\u6210\u6578\u64da\u5eab\u7684\u77ac\u6642\u8ca0\u8f09\u6fc0\u589e\uff0c\u751a\u81f3\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u5eab\u5d29\u6f70\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u67d0\u4e9b\u71b1\u9580\u6578\u64da\u7684\u7de9\u5b58\u5931\u6548\u6642\uff0c\u7279\u5225\u662f\u5728\u7528\u6236\u540c\u6642\u8acb\u6c42\u540c\u4e00\u500b\u9375\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<h2 id=\"%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%e7%9a%84%e6%88%90%e5%9b%a0-edntPbjlTU\">\u7de9\u5b58\u64ca\u7a7f\u7684\u6210\u56e0<\/h2>\n<ul>\n<li><strong>\u7de9\u5b58\u5931\u6548\uff1a<\/strong>\u7576\u67d0\u500b\u7de9\u5b58\u9375\u904e\u671f\u6216\u88ab\u522a\u9664\u6642\uff0c\u8acb\u6c42\u5c07\u76f4\u63a5\u767c\u9001\u5230\u6578\u64da\u5eab\u3002<\/li>\n<li><strong>\u9ad8\u4f75\u767c\u8acb\u6c42\uff1a<\/strong>\u5728\u9ad8\u6d41\u91cf\u7684\u60c5\u6cc1\u4e0b\uff0c\u8a31\u591a\u8acb\u6c42\u540c\u6642\u5230\u9054\uff0c\u5c0e\u81f4\u6578\u64da\u5eab\u77ac\u6642\u627f\u53d7\u5927\u91cf\u8acb\u6c42\u3002<\/li>\n<li><strong>\u71b1\u9580\u6578\u64da\uff1a<\/strong>\u67d0\u4e9b\u6578\u64da\u56e0\u70ba\u5176\u71b1\u9580\u6027\uff0c\u6703\u5728\u77ed\u6642\u9593\u5167\u5438\u5f15\u5927\u91cf\u8acb\u6c42\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%baredis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%e7%9a%84%e6%96%b9%e6%b3%95-edntPbjlTU\">\u89e3\u6c7aRedis\u7de9\u5b58\u64ca\u7a7f\u7684\u65b9\u6cd5<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e4%ba%92%e6%96%a5%e9%8e%96-edntPbjlTU\">1. \u4f7f\u7528\u4e92\u65a5\u9396<\/h3>\n<p>\u5728\u8acb\u6c42\u5230\u9054\u6642\uff0c\u9996\u5148\u6aa2\u67e5\u7de9\u5b58\u662f\u5426\u5b58\u5728\u3002\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5247\u4f7f\u7528\u4e92\u65a5\u9396\u4f86\u4fdd\u8b77\u6578\u64da\u5eab\u67e5\u8a62\u7684\u904e\u7a0b\u3002\u9019\u6a23\uff0c\u53ea\u6709\u7b2c\u4e00\u500b\u8acb\u6c42\u80fd\u5920\u67e5\u8a62\u6578\u64da\u5eab\u4e26\u66f4\u65b0\u7de9\u5b58\uff0c\u5176\u4ed6\u8acb\u6c42\u5247\u7b49\u5f85\u7de9\u5b58\u66f4\u65b0\u5b8c\u6210\u5f8c\u518d\u5f9e\u7de9\u5b58\u4e2d\u7372\u53d6\u6578\u64da\u3002<\/p>\n<pre><code>if (cache.get(key) == null) {\n    synchronized (lock) {\n        if (cache.get(key) == null) {\n            \/\/ \u67e5\u8a62\u6578\u64da\u5eab\n            Object data = database.query(key);\n            cache.put(key, data);\n        }\n    }\n}<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e9%a0%90%e5%8a%a0%e8%bc%89%e7%ad%96%e7%95%a5-edntPbjlTU\">2. \u4f7f\u7528\u9810\u52a0\u8f09\u7b56\u7565<\/h3>\n<p>\u5c0d\u65bc\u4e00\u4e9b\u71b1\u9580\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u5728\u7cfb\u7d71\u555f\u52d5\u6642\u6216\u5b9a\u671f\u9032\u884c\u9810\u52a0\u8f09\uff0c\u5c07\u9019\u4e9b\u6578\u64da\u63d0\u524d\u52a0\u8f09\u5230\u7de9\u5b58\u4e2d\uff0c\u5f9e\u800c\u6e1b\u5c11\u7de9\u5b58\u5931\u6548\u7684\u60c5\u6cc1\u3002<\/p>\n<h3 id=\"3-%e8%a8%ad%e7%bd%ae%e5%90%88%e7%90%86%e7%9a%84%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93-edntPbjlTU\">3. \u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593<\/h3>\n<p>\u5c0d\u65bc\u7de9\u5b58\u4e2d\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u6839\u64da\u5176\u4f7f\u7528\u983b\u7387\u548c\u91cd\u8981\u6027\u8a2d\u7f6e\u4e0d\u540c\u7684\u904e\u671f\u6642\u9593\u3002\u5c0d\u65bc\u71b1\u9580\u6578\u64da\uff0c\u53ef\u4ee5\u8003\u616e\u5ef6\u9577\u5176\u904e\u671f\u6642\u9593\uff0c\u6e1b\u5c11\u7de9\u5b58\u5931\u6548\u7684\u6a5f\u6703\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e7%b7%a9%e5%ad%98%e7%a9%bf%e9%80%8f%e6%8a%80%e8%a1%93-edntPbjlTU\">4. \u4f7f\u7528\u7de9\u5b58\u7a7f\u900f\u6280\u8853<\/h3>\n<p>\u5c0d\u65bc\u4e00\u4e9b\u4e0d\u5b58\u5728\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u4e00\u500b\u7a7a\u503c\u7de9\u5b58\uff0c\u907f\u514d\u6bcf\u6b21\u8acb\u6c42\u90fd\u67e5\u8a62\u6578\u64da\u5eab\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u5c0d\u6578\u64da\u5eab\u7684\u8acb\u6c42\u58d3\u529b\u3002<\/p>\n<pre><code>if (cache.get(key) == null) {\n    Object data = database.query(key);\n    if (data == null) {\n        cache.put(key, EMPTY_VALUE); \/\/ \u8a2d\u7f6e\u7a7a\u503c\u7de9\u5b58\n    } else {\n        cache.put(key, data);\n    }\n}<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-edntPbjlTU\">\u7e3d\u7d50<\/h2>\n<p>Redis\u7de9\u5b58\u64ca\u7a7f\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u4f46\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u7b56\u7565\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u5176\u5c0d\u7cfb\u7d71\u6027\u80fd\u7684\u5f71\u97ff\u3002\u4f7f\u7528\u4e92\u65a5\u9396\u3001\u9810\u52a0\u8f09\u7b56\u7565\u3001\u5408\u7406\u7684\u904e\u671f\u6642\u9593\u4ee5\u53ca\u7de9\u5b58\u7a7f\u900f\u6280\u8853\u7b49\u65b9\u6cd5\uff0c\u90fd\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u61c9\u5c0d\u9019\u4e00\u6311\u6230\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c <a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a> 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