java怎么输出mysql表内容

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2023/11/21 9:17:39
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要通过Java程序输出MySQL表的内容,你需要使用JDBC连接到MySQL数据库,并执行相应的查询语句。以下是一个示例代码,可以输出指定表的所有内容:

import java.sql.*;
public class Main {

????public?static?void?main(String[]?args)?{

????????String?url?=?“jdbc:mysql://localhost:3306/your_database_name”;

????????String?username?=?“your_username”;

????????String?password?=?“your_password”;

????????

????????try?{

????????????Connection?conn?=?DriverManager.getConnection(url,?username,?password);

????????????Statement?stmt?=?conn.createStatement();

????????????String?query?=?“SELECT?*?FROM?your_table_name”;

????????????ResultSet?rs?=?stmt.executeQuery(query);

????????????

????????????while?(rs.next())?{

????????????????int?id?=?rs.getInt(“id”);

????????????????String?name?=?rs.getString(“name”);

????????????????int?age?=?rs.getInt(“age”);

????????????????

????????????????System.out.println("ID:?"?+?id);

????????????????System.out.println("Name:?"?+?name);

????????????????System.out.println("Age:?"?+?age);

????????????????System.out.println();

????????????}

????????????

????????????rs.close();

????????????stmt.close();

????????????conn.close();

????????}?catch?(SQLException?e)?{

????????????e.printStackTrace();

????????}

????} }

your_database_name替换为你的数据库名称,your_usernameyour_password分别替换为你的数据库用户名和密码,your_table_name替换为你要输出内容的表名。运行该程序,就可以输出MySQL表的内容。

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