{"id":61983,"date":"2024-10-13T15:17:17","date_gmt":"2024-10-13T07:17:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61983\/"},"modified":"2024-10-13T15:17:17","modified_gmt":"2024-10-13T07:17:17","slug":"java%e5%a6%82%e4%bd%95%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a-java%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61983\/","title":{"rendered":"Java\u5982\u4f55\u67e5\u8a62\u6578\u64da\u5eab\u6578\u64da (java\u67e5\u8a62\u6578\u64da\u5eab\u6578\u64da)"},"content":{"rendered":"<h1 id=\"java%e5%a6%82%e4%bd%95%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a-qcKYxDLQpw\">Java\u5982\u4f55\u67e5\u8a62\u6578\u64da\u5eab\u6578\u64da<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u3002Java\u4f5c\u70ba\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Java\u9032\u884c\u6578\u64da\u5eab\u67e5\u8a62\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"1-%e7%92%b0%e5%a2%83%e6%ba%96%e5%82%99-qcKYxDLQpw\">1. \u74b0\u5883\u6e96\u5099<\/h2>\n<p>\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u78ba\u4fdd\u5df2\u7d93\u5b89\u88dd\u4e86\u4ee5\u4e0b\u74b0\u5883\uff1a<\/p>\n<ul>\n<li>Java Development Kit (JDK)<\/li>\n<li>\u4e00\u500b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08\u5982MySQL\u3001PostgreSQL\u7b49\uff09<\/li>\n<li>\u76f8\u61c9\u7684JDBC\u9a45\u52d5\u7a0b\u5e8f<\/li>\n<\/ul>\n<h2 id=\"2-%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab-qcKYxDLQpw\">2. \u9023\u63a5\u6578\u64da\u5eab<\/h2>\n<p>\u5728Java\u4e2d\uff0c\u4f7f\u7528JDBC\uff08Java Database Connectivity\uff09\u4f86\u9023\u63a5\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u9023\u63a5MySQL\u6578\u64da\u5eab\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\n\npublic class DatabaseConnection {\n    public static Connection connect() {\n        Connection connection = null;\n        try {\n            \/\/ \u52a0\u8f09JDBC\u9a45\u52d5\n            Class.forName(\"com.mysql.cj.jdbc.Driver\");\n            \/\/ \u5efa\u7acb\u9023\u63a5\n            connection = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/your_database\", \"username\", \"password\");\n        } catch (ClassNotFoundException | SQLException e) {\n            e.printStackTrace();\n        }\n        return connection;\n    }\n}\n<\/code><\/pre>\n<h2 id=\"3-%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-qcKYxDLQpw\">3. \u67e5\u8a62\u6578\u64da<\/h2>\n<p>\u4e00\u65e6\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528SQL\u8a9e\u53e5\u67e5\u8a62\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u67e5\u8a62\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.ResultSet;\nimport java.sql.SQLException;\nimport java.sql.Statement;\n\npublic class DataQuery {\n    public static void main(String[] args) {\n        Connection connection = DatabaseConnection.connect();\n        String query = \"SELECT * FROM your_table\";\n\n        try {\n            Statement statement = connection.createStatement();\n            ResultSet resultSet = statement.executeQuery(query);\n\n            while (resultSet.next()) {\n                \/\/ \u5047\u8a2d\u6709\u4e00\u500b\u540d\u70ba'name'\u7684\u5217\n                String name = resultSet.getString(\"name\");\n                System.out.println(\"Name: \" + name);\n            }\n        } catch (SQLException e) {\n            e.printStackTrace();\n        } finally {\n            try {\n                if (connection != null) {\n                    connection.close();\n                }\n            } catch (SQLException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8preparedstatement%e9%80%b2%e8%a1%8c%e6%9f%a5%e8%a9%a2-qcKYxDLQpw\">4. \u4f7f\u7528PreparedStatement\u9032\u884c\u67e5\u8a62<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8\u5b89\u5168\u6027\u548c\u6027\u80fd\uff0c\u5efa\u8b70\u4f7f\u7528PreparedStatement\u4f86\u57f7\u884c\u67e5\u8a62\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62SQL\u6ce8\u5165\u653b\u64ca\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528PreparedStatement\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.PreparedStatement;\nimport java.sql.ResultSet;\nimport java.sql.SQLException;\n\npublic class PreparedDataQuery {\n    public static void main(String[] args) {\n        Connection connection = DatabaseConnection.connect();\n        String query = \"SELECT * FROM your_table WHERE id = ?\";\n\n        try {\n            PreparedStatement preparedStatement = connection.prepareStatement(query);\n            preparedStatement.setInt(1, 1); \/\/ \u5047\u8a2d\u67e5\u8a62id\u70ba1\u7684\u6578\u64da\n            ResultSet resultSet = preparedStatement.executeQuery();\n\n            while (resultSet.next()) {\n                String name = resultSet.getString(\"name\");\n                System.out.println(\"Name: \" + name);\n            }\n        } catch (SQLException e) {\n            e.printStackTrace();\n        } finally {\n            try {\n                if (connection != null) {\n                    connection.close();\n                }\n            } catch (SQLException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"5-%e7%b8%bd%e7%b5%90-qcKYxDLQpw\">5. \u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528Java\u67e5\u8a62\u6578\u64da\u5eab\u6578\u64da\uff0c\u5305\u62ec\u9023\u63a5\u6578\u64da\u5eab\u3001\u57f7\u884c\u67e5\u8a62\u4ee5\u53ca\u4f7f\u7528PreparedStatement\u4f86\u63d0\u9ad8\u5b89\u5168\u6027\u3002\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u662f\u958b\u767cJava\u61c9\u7528\u7a0b\u5e8f\u6642\u5fc5\u4e0d\u53ef\u5c11\u7684\u6280\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u90e8\u7f72\u60a8\u7684Java\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528Java\u67e5\u8a62\u6578\u64da\u5eab\u6578\u64da\uff0c\u638c\u63e1JDBC\u9023\u63a5\u3001SQL\u8a9e\u53e5\u57f7\u884c\u53ca\u7d50\u679c\u8655\u7406\u7684\u6280\u5de7\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-61983","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61983","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=61983"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61983\/revisions"}],"predecessor-version":[{"id":61984,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61983\/revisions\/61984"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}