{"id":61969,"date":"2024-10-13T15:10:16","date_gmt":"2024-10-13T07:10:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61969\/"},"modified":"2024-10-13T15:10:16","modified_gmt":"2024-10-13T07:10:16","slug":"java%e8%bc%95%e9%ac%86%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%8c%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e7%ae%a1%e7%90%86-java%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61969\/","title":{"rendered":"Java\u8f15\u9b06\u8b80\u53d6\u6578\u64da\u5eab\uff0c\u5feb\u901f\u9ad8\u6548\u5be6\u73fe\u6578\u64da\u7ba1\u7406 (java\u6578\u64da\u5eab\u8b80\u53d6)"},"content":{"rendered":"

Java\u8f15\u9b06\u8b80\u53d6\u6578\u64da\u5eab\uff0c\u5feb\u901f\u9ad8\u6548\u5be6\u73fe\u6578\u64da\u7ba1\u7406<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002Java\u4f5c\u70ba\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u548c\u5eab\u4f86\u8f15\u9b06\u5730\u8b80\u53d6\u548c\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Java\u4f86\u9ad8\u6548\u5730\u8b80\u53d6\u6578\u64da\u5eab\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

Java\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5<\/h2>\n

\u5728\u958b\u59cb\u8b80\u53d6\u6578\u64da\u5eab\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002Java\u63d0\u4f9b\u4e86JDBC\uff08Java Database Connectivity\uff09API\uff0c\u9019\u662f\u4e00\u500b\u6a19\u6e96\u7684API\uff0c\u7528\u65bc\u9023\u63a5\u548c\u64cd\u4f5c\u5404\u7a2e\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528JDBC\u9023\u63a5MySQL\u6578\u64da\u5eab\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n

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
\u8b80\u53d6\u6578\u64da\u7684\u57fa\u672c\u64cd\u4f5c<\/h2>\n
\u4e00\u65e6\u5efa\u7acb\u4e86\u6578\u64da\u5eab\u9023\u63a5\uff0c\u5c31\u53ef\u4ee5\u958b\u59cb\u57f7\u884cSQL\u67e5\u8a62\u4f86\u8b80\u53d6\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u6578\u64da\uff1a<\/p>\n
import java.sql.Connection;\nimport java.sql.ResultSet;\nimport java.sql.SQLException;\nimport java.sql.Statement;\n\npublic class ReadData {\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
\u4f7f\u7528PreparedStatement\u63d0\u9ad8\u6548\u7387<\/h2>\n
\u5728\u8655\u7406\u7528\u6236\u8f38\u5165\u6216\u52d5\u614b\u67e5\u8a62\u6642\uff0c\u4f7f\u7528PreparedStatement\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u4e26\u9632\u6b62SQL\u6ce8\u5165\u653b\u64ca\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528PreparedStatement\u7684\u793a\u4f8b\uff1a<\/p>\n
import java.sql.Connection;\nimport java.sql.PreparedStatement;\nimport java.sql.ResultSet;\nimport java.sql.SQLException;\n\npublic class PreparedReadData {\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
\u7e3d\u7d50<\/h2>\n
Java\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u4f86\u8f15\u9b06\u8b80\u53d6\u548c\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528JDBC\u548cPreparedStatement\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9ad8\u6548\u5730\u57f7\u884c\u6578\u64da\u67e5\u8a62\uff0c\u4e26\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u7684\u5b89\u5168\u6027\u548c\u6027\u80fd\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u61c9\u7528\u9084\u662f\u5927\u578b\u7cfb\u7d71\uff0cJava\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u80fd\u529b\u90fd\u80fd\u6eff\u8db3\u9700\u6c42\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684Java\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 \u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8f15\u9b06\u4f7f\u7528Java\u8b80\u53d6\u6578\u64da\u5eab\uff0c\u5feb\u901f\u9ad8\u6548\u5be6\u73fe\u6578\u64da\u7ba1\u7406\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u64cd\u4f5c\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-61969","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61969","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=61969"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61969\/revisions"}],"predecessor-version":[{"id":61970,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61969\/revisions\/61970"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}