{"id":61913,"date":"2024-10-13T14:41:16","date_gmt":"2024-10-13T06:41:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61913\/"},"modified":"2024-10-13T14:41:16","modified_gmt":"2024-10-13T06:41:16","slug":"java%e6%8a%80%e5%b7%a7%ef%bc%9ajava%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8a%80%e5%b7%a7%e5%85%a8%e6%94%bb%e7%95%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61913\/","title":{"rendered":"Java\u6280\u5de7\uff1aJava\u9023\u63a5\u6578\u64da\u5eab\u6280\u5de7\u5168\u653b\u7565"},"content":{"rendered":"<h1 id=\"java%e6%8a%80%e5%b7%a7%ef%bc%9ajava%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8a%80%e5%b7%a7%e5%85%a8%e6%94%bb%e7%95%a5-jmboUQTtRU\">Java\u6280\u5de7\uff1aJava\u9023\u63a5\u6578\u64da\u5eab\u6280\u5de7\u5168\u653b\u7565<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u5df2\u7d93\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002Java\u4f5c\u70ba\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u9023\u63a5\u6578\u64da\u5eab\u7684\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eJava\u9023\u63a5\u6578\u64da\u5eab\u7684\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u9ad8\u6548\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"1-jdbc%e6%a6%82%e8%bf%b0-jmboUQTtRU\">1. JDBC\u6982\u8ff0<\/h2>\n<p>Java\u6578\u64da\u5eab\u9023\u63a5\uff08JDBC\uff09\u662f\u4e00\u500bJava API\uff0c\u5141\u8a31Java\u61c9\u7528\u7a0b\u5e8f\u8207\u5404\u7a2e\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002JDBC\u63d0\u4f9b\u4e86\u4e00\u7d44\u6a19\u6e96\u7684\u63a5\u53e3\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904e\u9019\u4e9b\u63a5\u53e3\u57f7\u884cSQL\u67e5\u8a62\u3001\u66f4\u65b0\u6578\u64da\u548c\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\u3002<\/p>\n<h3 id=\"1-1-jdbc%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%84%e4%bb%b6-jmboUQTtRU\">1.1 JDBC\u7684\u57fa\u672c\u7d44\u4ef6<\/h3>\n<ul>\n<li><strong>DriverManager\uff1a<\/strong>\u8ca0\u8cac\u7ba1\u7406\u6578\u64da\u5eab\u9a45\u52d5\u7a0b\u5e8f\u7684\u985e\u3002<\/li>\n<li><strong>Connection\uff1a<\/strong>\u8868\u793a\u8207\u7279\u5b9a\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002<\/li>\n<li><strong>Statement\uff1a<\/strong>\u7528\u65bc\u57f7\u884cSQL\u8a9e\u53e5\u7684\u5c0d\u8c61\u3002<\/li>\n<li><strong>ResultSet\uff1a<\/strong>\u8868\u793a\u67e5\u8a62\u7d50\u679c\u7684\u5c0d\u8c61\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%ad%a5%e9%a9%9f-jmboUQTtRU\">2. \u9023\u63a5\u6578\u64da\u5eab\u7684\u6b65\u9a5f<\/h2>\n<p>\u9023\u63a5\u6578\u64da\u5eab\u7684\u904e\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ol>\n<li>\u52a0\u8f09\u6578\u64da\u5eab\u9a45\u52d5\u7a0b\u5e8f\u3002<\/li>\n<li>\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002<\/li>\n<li>\u5275\u5efaStatement\u5c0d\u8c61\u3002<\/li>\n<li>\u57f7\u884cSQL\u67e5\u8a62\u3002<\/li>\n<li>\u8655\u7406\u7d50\u679c\u96c6\u3002<\/li>\n<li>\u95dc\u9589\u9023\u63a5\u3002<\/li>\n<\/ol>\n<h3 id=\"2-1-%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-jmboUQTtRU\">2.1 \u793a\u4f8b\u4ee3\u78bc<\/h3>\n<pre><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.ResultSet;\nimport java.sql.Statement;\n\npublic class DatabaseExample {\n    public static void main(String[] args) {\n        Connection connection = null;\n        Statement statement = null;\n        ResultSet resultSet = null;\n\n        try {\n            \/\/ \u52a0\u8f09\u9a45\u52d5\u7a0b\u5e8f\n            Class.forName(\"com.mysql.cj.jdbc.Driver\");\n            \/\/ \u5efa\u7acb\u9023\u63a5\n            connection = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/mydatabase\", \"username\", \"password\");\n            \/\/ \u5275\u5efaStatement\u5c0d\u8c61\n            statement = connection.createStatement();\n            \/\/ \u57f7\u884c\u67e5\u8a62\n            resultSet = statement.executeQuery(\"SELECT * FROM users\");\n\n            \/\/ \u8655\u7406\u7d50\u679c\u96c6\n            while (resultSet.next()) {\n                System.out.println(\"User ID: \" + resultSet.getInt(\"id\"));\n                System.out.println(\"User Name: \" + resultSet.getString(\"name\"));\n            }\n        } catch (Exception e) {\n            e.printStackTrace();\n        } finally {\n            \/\/ \u95dc\u9589\u8cc7\u6e90\n            try {\n                if (resultSet != null) resultSet.close();\n                if (statement != null) statement.close();\n                if (connection != null) connection.close();\n            } catch (Exception e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8%e9%80%a3%e6%8e%a5%e6%b1%a0%e6%8f%90%e9%ab%98%e6%80%a7%e8%83%bd-jmboUQTtRU\">3. \u4f7f\u7528\u9023\u63a5\u6c60\u63d0\u9ad8\u6027\u80fd<\/h2>\n<p>\u5728\u9ad8\u4e26\u767c\u7684\u61c9\u7528\u4e2d\uff0c\u983b\u7e41\u5730\u5efa\u7acb\u548c\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5\u6703\u5c0e\u81f4\u6027\u80fd\u74f6\u9838\u3002\u4f7f\u7528\u9023\u63a5\u6c60\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u500b\u554f\u984c\u3002\u9023\u63a5\u6c60\u9810\u5148\u5275\u5efa\u4e00\u5b9a\u6578\u91cf\u7684\u9023\u63a5\uff0c\u4e26\u5728\u9700\u8981\u6642\u91cd\u7528\u9019\u4e9b\u9023\u63a5\u3002<\/p>\n<h3 id=\"3-1-%e5%b8%b8%e7%94%a8%e7%9a%84%e9%80%a3%e6%8e%a5%e6%b1%a0%e6%a1%86%e6%9e%b6-jmboUQTtRU\">3.1 \u5e38\u7528\u7684\u9023\u63a5\u6c60\u6846\u67b6<\/h3>\n<ul>\n<li><strong>Apache DBCP\uff1a<\/strong>\u4e00\u500b\u7c21\u55ae\u6613\u7528\u7684\u9023\u63a5\u6c60\u5be6\u73fe\u3002<\/li>\n<li><strong>HikariCP\uff1a<\/strong>\u4ee5\u9ad8\u6027\u80fd\u8457\u7a31\u7684\u9023\u63a5\u6c60\u3002<\/li>\n<li><strong>C3P0\uff1a<\/strong>\u529f\u80fd\u5f37\u5927\u7684\u9023\u63a5\u6c60\uff0c\u652f\u6301\u81ea\u52d5\u6e2c\u8a66\u548c\u91cd\u9023\u3002<\/li>\n<\/ul>\n<h2 id=\"4-%e8%99%95%e7%90%86%e7%95%b0%e5%b8%b8-jmboUQTtRU\">4. \u8655\u7406\u7570\u5e38<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\uff0c\u7570\u5e38\u8655\u7406\u81f3\u95dc\u91cd\u8981\u3002\u958b\u767c\u8005\u61c9\u8a72\u4f7f\u7528try-catch\u584a\u4f86\u6355\u7372SQL\u7570\u5e38\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u76f8\u61c9\u7684\u8655\u7406\u3002<\/p>\n<pre><code>try {\n    \/\/ \u6578\u64da\u5eab\u64cd\u4f5c\n} catch (SQLException e) {\n    System.err.println(\"SQL\u932f\u8aa4: \" + e.getMessage());\n} catch (Exception e) {\n    System.err.println(\"\u5176\u4ed6\u932f\u8aa4: \" + e.getMessage());\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-jmboUQTtRU\">\u7e3d\u7d50<\/h2>\n<p>Java\u9023\u63a5\u6578\u64da\u5eab\u7684\u6280\u5de7\u4e0d\u50c5\u5305\u62ec\u57fa\u672c\u7684JDBC\u64cd\u4f5c\uff0c\u9084\u6d89\u53ca\u5230\u6027\u80fd\u512a\u5316\u548c\u7570\u5e38\u8655\u7406\u7b49\u65b9\u9762\u3002\u638c\u63e1\u9019\u4e9b\u6280\u5de7\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u5728\u5be6\u969b\u9805\u76ee\u4e2d\u66f4\u9ad8\u6548\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002\u82e5\u60a8\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u652f\u6301\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u63d0\u5347\u60a8\u7684\u61c9\u7528\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1Java\u9023\u63a5\u6578\u64da\u5eab\u7684\u6280\u5de7\uff0c\u5f9e\u57fa\u672c\u8a2d\u7f6e\u5230\u9ad8\u7d1a\u64cd\u4f5c\uff0c\u5168\u9762\u63d0\u5347\u4f60\u7684\u958b\u767c\u6548\u7387\u8207\u6578\u64da\u7ba1\u7406\u80fd\u529b\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-61913","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61913","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=61913"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61913\/revisions"}],"predecessor-version":[{"id":61914,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61913\/revisions\/61914"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}