{"id":62019,"date":"2024-10-13T15:32:59","date_gmt":"2024-10-13T07:32:59","guid":{"rendered":"https:\/\/server.hk\/cnblog\/62019\/"},"modified":"2024-10-13T15:32:59","modified_gmt":"2024-10-13T07:32:59","slug":"java%e5%af%a6%e7%8f%be%e5%b0%8d%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e7%9a%84%e6%8e%92%e5%ba%8f-%e5%b0%8d%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%80%b2%e8%a1%8c%e6%8e%92%e5%ba%8fjava","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/62019\/","title":{"rendered":"Java\u5be6\u73fe\u5c0d\u6578\u64da\u5eab\u6578\u64da\u7684\u6392\u5e8f (\u5c0d\u6578\u64da\u5eab\u6578\u64da\u9032\u884c\u6392\u5e8fjava)"},"content":{"rendered":"<h1 id=\"java%e5%af%a6%e7%8f%be%e5%b0%8d%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e7%9a%84%e6%8e%92%e5%ba%8f-VZkHetGMKE\">Java\u5be6\u73fe\u5c0d\u6578\u64da\u5eab\u6578\u64da\u7684\u6392\u5e8f<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u7684\u6392\u5e8f\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u7528\u65bc\u986f\u793a\u7528\u6236\u5217\u8868\u3001\u7522\u54c1\u76ee\u9304\uff0c\u9084\u662f\u5831\u544a\u751f\u6210\uff0c\u6392\u5e8f\u90fd\u80fd\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u6578\u64da\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Java\u4f86\u5be6\u73fe\u5c0d\u6578\u64da\u5eab\u6578\u64da\u7684\u6392\u5e8f\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8e%92%e5%ba%8f%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-VZkHetGMKE\">\u6578\u64da\u5eab\u6392\u5e8f\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u6392\u5e8f\u901a\u5e38\u662f\u901a\u904eSQL\u67e5\u8a62\u8a9e\u53e5\u4f86\u5be6\u73fe\u7684\u3002\u6700\u5e38\u7528\u7684\u6392\u5e8f\u95dc\u9375\u5b57\u662f <code>ORDER BY<\/code>\uff0c\u5b83\u53ef\u4ee5\u6839\u64da\u4e00\u500b\u6216\u591a\u500b\u5217\u7684\u503c\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u6392\u5e8f\u53ef\u4ee5\u662f\u5347\u5e8f\uff08<code>ASC<\/code>\uff09\u6216\u964d\u5e8f\uff08<code>DESC<\/code>\uff09\u3002<\/p>\n<h3 id=\"sql%e6%8e%92%e5%ba%8f%e7%a4%ba%e4%be%8b-VZkHetGMKE\">SQL\u6392\u5e8f\u793a\u4f8b<\/h3>\n<pre><code>SELECT * FROM users ORDER BY last_name ASC;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8a62\u5c07\u5f9e <code>users<\/code> \u8868\u4e2d\u9078\u64c7\u6240\u6709\u7528\u6236\uff0c\u4e26\u6839\u64da <code>last_name<\/code> \u5217\u7684\u503c\u9032\u884c\u5347\u5e8f\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8java%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c-VZkHetGMKE\">\u4f7f\u7528Java\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c<\/h2>\n<p>\u5728Java\u4e2d\uff0c\u6211\u5011\u901a\u5e38\u4f7f\u7528JDBC\uff08Java Database Connectivity\uff09\u4f86\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528JDBC\u9032\u884c\u6578\u64da\u5eab\u6392\u5e8f\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li>\u52a0\u8f09\u6578\u64da\u5eab\u9a45\u52d5\u7a0b\u5e8f<\/li>\n<li>\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5<\/li>\n<li>\u5275\u5efaSQL\u67e5\u8a62\u8a9e\u53e5<\/li>\n<li>\u57f7\u884c\u67e5\u8a62\u4e26\u8655\u7406\u7d50\u679c\u96c6<\/li>\n<li>\u95dc\u9589\u9023\u63a5<\/li>\n<\/ul>\n<h3 id=\"java%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b-VZkHetGMKE\">Java\u4ee3\u78bc\u793a\u4f8b<\/h3>\n<pre><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.ResultSet;\nimport java.sql.Statement;\n\npublic class DatabaseSortExample {\n    public static void main(String[] args) {\n        String url = \"jdbc:mysql:\/\/localhost:3306\/mydatabase\";\n        String user = \"username\";\n        String password = \"password\";\n\n        try {\n            \/\/ \u52a0\u8f09\u6578\u64da\u5eab\u9a45\u52d5\u7a0b\u5e8f\n            Class.forName(\"com.mysql.cj.jdbc.Driver\");\n            \/\/ \u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5\n            Connection connection = DriverManager.getConnection(url, user, password);\n            \/\/ \u5275\u5efaSQL\u67e5\u8a62\u8a9e\u53e5\n            String sql = \"SELECT * FROM users ORDER BY last_name ASC\";\n            Statement statement = connection.createStatement();\n            \/\/ \u57f7\u884c\u67e5\u8a62\n            ResultSet resultSet = statement.executeQuery(sql);\n\n            \/\/ \u8655\u7406\u7d50\u679c\u96c6\n            while (resultSet.next()) {\n                System.out.println(\"User ID: \" + resultSet.getInt(\"id\") + \", Last Name: \" + resultSet.getString(\"last_name\"));\n            }\n\n            \/\/ \u95dc\u9589\u9023\u63a5\n            resultSet.close();\n            statement.close();\n            connection.close();\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u52a0\u8f09\u4e86MySQL\u7684JDBC\u9a45\u52d5\u7a0b\u5e8f\uff0c\u7136\u5f8c\u5efa\u7acb\u4e86\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u63a5\u8457\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500bSQL\u67e5\u8a62\uff0c\u4e26\u4f7f\u7528 <code>Statement<\/code> \u5c0d\u8c61\u57f7\u884c\u67e5\u8a62\u3002\u6700\u5f8c\uff0c\u6211\u5011\u904d\u6b77\u7d50\u679c\u96c6\u4e26\u6253\u5370\u51fa\u7528\u6236\u7684ID\u548c\u59d3\u6c0f\u3002<\/p>\n<h2 id=\"%e6%8e%92%e5%ba%8f%e7%9a%84%e5%85%b6%e4%bb%96%e8%80%83%e9%87%8f-VZkHetGMKE\">\u6392\u5e8f\u7684\u5176\u4ed6\u8003\u91cf<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6392\u5e8f\u53ef\u80fd\u6703\u53d7\u5230\u591a\u7a2e\u56e0\u7d20\u7684\u5f71\u97ff\uff0c\u4f8b\u5982\u6578\u64da\u91cf\u7684\u5927\u5c0f\u3001\u7d22\u5f15\u7684\u4f7f\u7528\u7b49\u3002\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u9069\u7576\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6392\u5e8f\u6027\u80fd\u3002\u6b64\u5916\uff0c\u5c0d\u65bc\u8907\u96dc\u7684\u6392\u5e8f\u9700\u6c42\uff0c\u53ef\u80fd\u9700\u8981\u8003\u616e\u4f7f\u7528\u591a\u5217\u6392\u5e8f\u6216\u81ea\u5b9a\u7fa9\u6392\u5e8f\u908f\u8f2f\u3002<\/p>\n<h3 id=\"%e5%a4%9a%e5%88%97%e6%8e%92%e5%ba%8f%e7%a4%ba%e4%be%8b-VZkHetGMKE\">\u591a\u5217\u6392\u5e8f\u793a\u4f8b<\/h3>\n<pre><code>SELECT * FROM users ORDER BY last_name ASC, first_name DESC;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u9996\u5148\u6839\u64da <code>last_name<\/code> \u9032\u884c\u5347\u5e8f\u6392\u5e8f\uff0c\u7136\u5f8c\u6839\u64da <code>first_name<\/code> \u9032\u884c\u964d\u5e8f\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-VZkHetGMKE\">\u7e3d\u7d50<\/h2>\n<p>\u5728Java\u4e2d\u5be6\u73fe\u5c0d\u6578\u64da\u5eab\u6578\u64da\u7684\u6392\u5e8f\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u4e3b\u8981\u4f9d\u8cf4\u65bcSQL\u7684 <code>ORDER BY<\/code> \u8a9e\u53e5\u3002\u901a\u904eJDBC\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u57f7\u884c\u67e5\u8a62\u4e26\u8655\u7406\u7d50\u679c\u96c6\u3002\u7121\u8ad6\u662f\u55ae\u5217\u6392\u5e8f\u9084\u662f\u591a\u5217\u6392\u5e8f\uff0c\u7406\u89e3\u6578\u64da\u5eab\u7684\u6392\u5e8f\u6a5f\u5236\u5c0d\u65bc\u958b\u767c\u9ad8\u6548\u7684\u61c9\u7528\u7a0b\u5e8f\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684Java\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528Java\u5c0d\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u9032\u884c\u6392\u5e8f\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u8655\u7406\u6d41\u7a0b\u3002<\/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-62019","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62019","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=62019"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62019\/revisions"}],"predecessor-version":[{"id":62020,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62019\/revisions\/62020"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=62019"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=62019"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=62019"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}