java查询mysql数据库数据

import java.sql.*;

public class MySQLQueryExample {
    public static void main(String[] args) {
        // JDBC连接MySQL数据库
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "password";

        try {
            // 加载数据库驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            // 建立数据库连接
            Connection connection = DriverManager.getConnection(url, username, password);

            // 执行查询语句
            String sql = "SELECT * FROM users";
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery(sql);

            // 处理查询结果
            while (resultSet.next()) {
                String id = resultSet.getString("id");
                String name = resultSet.getString("name");
                System.out.println("ID: " + id + ", Name: " + name);
            }

            // 关闭数据库连接
            resultSet.close();
            statement.close();
            connection.close();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}