jdbc连接mysql查询数据

import java.sql.*;

public class JdbcExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";

        try {
            // 加载JDBC驱动
            Class.forName("com.mysql.cj.jdbc.Driver");

            // 建立连接
            Connection conn = DriverManager.getConnection(url, user, password);

            // 创建Statement对象
            Statement stmt = conn.createStatement();

            // 执行查询
            String sql = "SELECT id, name FROM users";
            ResultSet rs = stmt.executeQuery(sql);

            // 处理结果集
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                System.out.println("ID: " + id + ", Name: " + name);
            }

            // 关闭资源
            rs.close();
            stmt.close();
            conn.close();
        } catch (ClassNotFoundException e) {
            System.out.println("找不到JDBC驱动程序");
            e.printStackTrace();
        } catch (SQLException e) {
            System.out.println("数据库连接失败");
            e.printStackTrace();
        }
    }
}