{"id":202064,"date":"2025-05-10T08:34:20","date_gmt":"2025-05-10T00:34:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202064\/"},"modified":"2025-05-10T08:34:20","modified_gmt":"2025-05-10T00:34:20","slug":"%e4%bd%bf%e7%94%a8java%e5%92%8credis%e6%9e%84%e5%bb%ba%e5%88%86%e5%b8%83%e5%bc%8f%e6%8e%a8%e8%8d%90%e7%b3%bb%e7%bb%9f%ef%bc%9a%e5%a6%82%e4%bd%95%e4%b8%aa%e6%80%a7%e5%8c%96%e6%8e%a8%e8%8d%90%e5%95%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202064\/","title":{"rendered":"\u4f7f\u7528Java\u548cRedis\u6784\u5efa\u5206\u5e03\u5f0f\u63a8\u8350\u7cfb\u7edf\uff1a\u5982\u4f55\u4e2a\u6027\u5316\u63a8\u8350\u5546\u54c1"},"content":{"rendered":"

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

\u4f7f\u7528Java\u548cRedis\u6784\u5efa\u5206\u5e03\u5f0f\u63a8\u8350\u7cfb\u7edf\uff1a\u5982\u4f55\u4e2a\u6027\u5316\u63a8\u8350\u5546\u54c1<\/h1>\n

\u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662f\u6570\u636e\u5e93\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300a\u4f7f\u7528Java\u548cRedis\u6784\u5efa\u5206\u5e03\u5f0f\u63a8\u8350\u7cfb\u7edf\uff1a\u5982\u4f55\u4e2a\u6027\u5316\u63a8\u8350\u5546\u54c1\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

\u4f7f\u7528Java\u548cRedis\u6784\u5efa\u5206\u5e03\u5f0f\u63a8\u8350\u7cfb\u7edf\uff1a\u5982\u4f55\u4e2a\u6027\u5316\u63a8\u8350\u5546\u54c1<\/p>\n

\u5f15\u8a00\uff1a
\u968f\u7740\u4e92\u8054\u7f51\u7684\u53d1\u5c55\uff0c\u4e2a\u6027\u5316\u63a8\u8350\u6210\u4e3a\u4e86\u7535\u5b50\u5546\u52a1\u548c\u793e\u4ea4\u5a92\u4f53\u5e73\u53f0\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u529f\u80fd\u4e4b\u4e00\u3002\u800c\u6784\u5efa\u4e00\u4e2a\u9ad8\u6548\u4e14\u51c6\u786e\u7684\u4e2a\u6027\u5316\u63a8\u8350\u7cfb\u7edf\u5bf9\u4e8e\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u548c\u4fc3\u8fdb\u9500\u552e\u975e\u5e38\u91cd\u8981\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Java\u548cRedis\u6784\u5efa\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684\u4e2a\u6027\u5316\u63a8\u8350\u7cfb\u7edf\uff0c\u5e76\u63d0\u4f9b\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u4e00\u3001\u63a8\u8350\u7cfb\u7edf\u7684\u57fa\u672c\u539f\u7406
\u4e2a\u6027\u5316\u63a8\u8350\u7cfb\u7edf\u57fa\u4e8e\u7528\u6237\u7684\u5386\u53f2\u884c\u4e3a\u3001\u5174\u8da3\u548c\u504f\u597d\u7b49\u4fe1\u606f\uff0c\u4e3a\u7528\u6237\u63d0\u4f9b\u4e2a\u6027\u5316\u7684\u63a8\u8350\u7ed3\u679c\u3002\u63a8\u8350\u7cfb\u7edf\u4e00\u822c\u5206\u4e3a\u4e24\u7c7b\uff1a\u534f\u540c\u8fc7\u6ee4\u63a8\u8350\u548c\u5185\u5bb9\u63a8\u8350\u3002<\/p>\n

1.1 \u534f\u540c\u8fc7\u6ee4\u63a8\u8350
\u534f\u540c\u8fc7\u6ee4\u63a8\u8350\u662f\u57fa\u4e8e\u7528\u6237\u6216\u7269\u54c1\u7684\u76f8\u4f3c\u5ea6\u8fdb\u884c\u63a8\u8350\u7684\u65b9\u6cd5\u3002\u5176\u4e2d\uff0c\u7528\u6237\u534f\u540c\u8fc7\u6ee4\u63a8\u8350\u6839\u636e\u7528\u6237\u5bf9\u7269\u54c1\u7684\u8bc4\u5206\u8fdb\u884c\u76f8\u4f3c\u5ea6\u8ba1\u7b97\uff0c\u800c\u7269\u54c1\u534f\u540c\u8fc7\u6ee4\u63a8\u8350\u5219\u662f\u6839\u636e\u7528\u6237\u7684\u5386\u53f2\u884c\u4e3a\u8fdb\u884c\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u3002<\/p>\n

1.2 \u5185\u5bb9\u63a8\u8350
\u5185\u5bb9\u63a8\u8350\u662f\u57fa\u4e8e\u7269\u54c1\u672c\u8eab\u7684\u5c5e\u6027\u8fdb\u884c\u63a8\u8350\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u5bf9\u7269\u54c1\u7684\u6807\u7b7e\u3001\u5173\u952e\u8bcd\u7b49\u8fdb\u884c\u5206\u6790\u548c\u5339\u914d\uff0c\u7ed9\u7528\u6237\u63a8\u8350\u4e0e\u5176\u504f\u597d\u76f8\u7b26\u7684\u7269\u54c1\u3002<\/p>\n

\u4e8c\u3001Java\u4e0eRedis\u7684\u7ed3\u5408
Java\u4f5c\u4e3a\u4e00\u79cd\u6d41\u884c\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5f00\u53d1\u5404\u7c7b\u5e94\u7528\u7a0b\u5e8f\u3002\u800cRedis\u662f\u4e00\u79cd\u9ad8\u6027\u80fd\u7684\u5185\u5b58\u6570\u636e\u5e93\uff0c\u9002\u5408\u7528\u6765\u5b58\u50a8\u548c\u67e5\u8be2\u63a8\u8350\u7cfb\u7edf\u7684\u6570\u636e\u3002<\/p>\n

2.1 Redis\u7684\u5b89\u88c5\u548c\u914d\u7f6e
\u9996\u5148\uff0c\u9700\u8981\u5728\u672c\u5730\u6216\u670d\u52a1\u5668\u4e0a\u5b89\u88c5Redis\uff0c\u5e76\u8fdb\u884c\u76f8\u5173\u914d\u7f6e\u3002\u53ef\u4ee5\u8bbf\u95eeRedis\u5b98\u65b9\u7f51\u7ad9\uff08https:\/\/redis.io\uff09\u83b7\u53d6\u8be6\u7ec6\u7684\u5b89\u88c5\u548c\u914d\u7f6e\u8bf4\u660e\u3002<\/p>\n

2.2 Java\u4e0eRedis\u7684\u8fde\u63a5
\u5728Java\u4e2d\u4f7f\u7528Redis\uff0c\u53ef\u4ee5\u4f7f\u7528Jedis\u4f5c\u4e3aRedis\u7684\u5ba2\u6237\u7aef\u5e93\u3002\u53ef\u4ee5\u901a\u8fc7maven\u6dfb\u52a0\u4ee5\u4e0b\u4f9d\u8d56\u5173\u7cfb\u6765\u4f7f\u7528Jedis\uff1a<\/p>\n

<dependency>\n    <groupId>redis.clients<\/groupId>\n    <artifactId>jedis<\/artifactId>\n    <version>3.5.2<\/version>\n<\/dependency><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u6765\u8fde\u63a5Redis\u670d\u52a1\u5668\uff1a<\/p>\n
Jedis jedis = new Jedis(\"localhost\", 6379);<\/pre>\n
\u4e09\u3001\u6784\u5efa\u4e2a\u6027\u5316\u63a8\u8350\u7cfb\u7edf
\u4e3a\u4e86\u6f14\u793a\u5982\u4f55\u4e2a\u6027\u5316\u63a8\u8350\u5546\u54c1\uff0c\u6211\u4eec\u5c06\u4ee5\u7528\u6237\u534f\u540c\u8fc7\u6ee4\u63a8\u8350\u4e3a\u4f8b\u5b50\uff0c\u4ecb\u7ecd\u5177\u4f53\u7684\u5b9e\u73b0\u6b65\u9aa4\u3002<\/p>\n
3.1 \u6570\u636e\u51c6\u5907
\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u51c6\u5907\u63a8\u8350\u7cfb\u7edf\u6240\u9700\u7684\u6570\u636e\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u6570\u636e\u5206\u4e3a\u7528\u6237\u6570\u636e\u548c\u7269\u54c1\u6570\u636e\u3002\u7528\u6237\u6570\u636e\u5305\u542b\u7528\u6237ID\u3001\u5386\u53f2\u884c\u4e3a\u7b49\u4fe1\u606f\uff1b\u7269\u54c1\u6570\u636e\u5305\u542b\u7269\u54c1ID\u3001\u7269\u54c1\u5c5e\u6027\u7b49\u4fe1\u606f\u3002<\/p>\n
\u5c06\u7528\u6237\u6570\u636e\u548c\u7269\u54c1\u6570\u636e\u5b58\u50a8\u5230Redis\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
\/\/ \u5b58\u50a8\u7528\u6237\u6570\u636e\njedis.hset(\"user:1\", \"name\", \"\u5f20\u4e09\");\njedis.hset(\"user:1\", \"age\", \"30\");\n\/\/ \u5b58\u50a8\u7269\u54c1\u6570\u636e\njedis.hset(\"item:1\", \"name\", \"\u5546\u54c11\");\njedis.hset(\"item:1\", \"price\", \"100\");<\/pre>\n
3.2 \u8ba1\u7b97\u7528\u6237\u76f8\u4f3c\u5ea6
\u6839\u636e\u7528\u6237\u7684\u5386\u53f2\u884c\u4e3a\uff0c\u53ef\u4ee5\u8ba1\u7b97\u7528\u6237\u4e4b\u95f4\u7684\u76f8\u4f3c\u5ea6\u3002\u53ef\u4ee5\u4f7f\u7528Jaccard\u76f8\u4f3c\u5ea6\u6216\u4f59\u5f26\u76f8\u4f3c\u5ea6\u7b49\u7b97\u6cd5\u6765\u8ba1\u7b97\u76f8\u4f3c\u5ea6\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4f7f\u7528\u4f59\u5f26\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u7528\u6237\u76f8\u4f3c\u5ea6\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
\/\/ \u8ba1\u7b97\u7528\u6237\u76f8\u4f3c\u5ea6\npublic double getUserSimilarity(String user1Id, String user2Id) {\n    Map<String, Double> user1Vector = getUserVector(user1Id);\n    Map<String, Double> user2Vector = getUserVector(user2Id);\n    \n    \/\/ \u8ba1\u7b97\u5411\u91cf\u70b9\u79ef\n    double dotProduct = 0;\n    for (String itemId : user1Vector.keySet()) {\n        if (user2Vector.containsKey(itemId)) {\n            dotProduct += user1Vector.get(itemId) * user2Vector.get(itemId);\n        }\n    }\n    \n    \/\/ \u8ba1\u7b97\u5411\u91cf\u957f\u5ea6\n    double user1Length = Math.sqrt(user1Vector.values().stream()\n                                      .mapToDouble(v -> v * v)\n                                      .sum());\n    double user2Length = Math.sqrt(user2Vector.values().stream()\n                                      .mapToDouble(v -> v * v)\n                                      .sum());\n    \n    \/\/ \u8ba1\u7b97\u76f8\u4f3c\u5ea6\n    return dotProduct \/ (user1Length * user2Length);\n}\n\n\/\/ \u83b7\u53d6\u7528\u6237\u5411\u91cf\npublic Map<String, Double> getUserVector(String userId) {\n    Map<String, Double> userVector = new HashMap<>();\n    \n    \/\/ \u67e5\u8be2\u7528\u6237\u5386\u53f2\u884c\u4e3a\uff0c\u6784\u5efa\u7528\u6237\u5411\u91cf\n    Set<String> itemIds = jedis.smembers(\"user:\" + userId + \":items\");\n    for (String itemId : itemIds) {\n        String rating = jedis.hget(\"user:\" + userId + \":ratings\", itemId);\n        userVector.put(itemId, Double.parseDouble(rating));\n    }\n    \n    return userVector;\n}<\/pre>\n
3.3 \u4e2a\u6027\u5316\u63a8\u8350
\u6839\u636e\u7528\u6237\u7684\u5386\u53f2\u884c\u4e3a\u548c\u76f8\u4f3c\u5ea6\uff0c\u53ef\u4ee5\u4e3a\u7528\u6237\u63a8\u8350\u76f8\u4f3c\u7528\u6237\u611f\u5174\u8da3\u7684\u7269\u54c1\u3002\u4ee5\u4e0b\u662f\u4e2a\u6027\u5316\u63a8\u8350\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
\/\/ \u4e2a\u6027\u5316\u63a8\u8350\npublic List<String> recommendItems(String userId) {\n    Map<String, Double> userVector = getUserVector(userId);\n    List<String> recommendedItems = new ArrayList<>();\n    \n    \/\/ \u6839\u636e\u7528\u6237\u76f8\u4f3c\u5ea6\u8fdb\u884c\u63a8\u8350\n    for (String similarUser : jedis.zrangeByScore(\"user:\" + userId + \":similarity\", 0, 1)) {\n        Set<String> itemIds = jedis.smembers(\"user:\" + similarUser + \":items\");\n        for (String itemId : itemIds) {\n            if (!userVector.containsKey(itemId)) {\n                recommendedItems.add(itemId);\n            }\n        }\n    }\n    \n    return recommendedItems;\n}<\/pre>\n
\u56db\u3001\u603b\u7ed3
\u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528Java\u548cRedis\u6784\u5efa\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684\u4e2a\u6027\u5316\u63a8\u8350\u7cfb\u7edf\u3002\u901a\u8fc7\u6f14\u793a\u7528\u6237\u534f\u540c\u8fc7\u6ee4\u63a8\u8350\u7684\u5b9e\u73b0\u6b65\u9aa4\uff0c\u5e76\u63d0\u4f9b\u4e86\u76f8\u5173\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u53ef\u4ee5\u4e3a\u8bfb\u8005\u7406\u89e3\u548c\u5b9e\u8df5\u4e2a\u6027\u5316\u63a8\u8350\u7cfb\u7edf\u63d0\u4f9b\u4e00\u4e9b\u53c2\u8003\u3002<\/p>\n
\u5f53\u7136\uff0c\u4e2a\u6027\u5316\u63a8\u8350\u6d89\u53ca\u5230\u66f4\u591a\u7684\u7b97\u6cd5\u548c\u6280\u672f\uff0c\u5982\u77e9\u9635\u5206\u89e3\u3001\u6df1\u5ea6\u5b66\u4e60\u7b49\u3002\u8bfb\u8005\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u548c\u4e1a\u52a1\u573a\u666f\u8fdb\u884c\u9002\u5f53\u7684\u4f18\u5316\u548c\u6269\u5c55\u3002<\/p>\n
\n
\n <\/dt>\n
\n   \u5982\u4f55\u5229\u7528Redis\u548cGolang\u6784\u5efa\u5206\u5e03\u5f0f\u9501\u529f\u80fd\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   \u5982\u4f55\u4f7f\u7528Redis\u548cRuby\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u529f\u80fd\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u4f7f\u7528Java\u548cRedis\u6784\u5efa\u5206\u5e03...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-202064","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202064","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202064"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202064\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202064"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202064"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202064"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}