java访问mysql数据库示例

import java.sql.*;

public class MySQLExample {
    public static void main(String[] args) {
        // MySQL连接信息
        String url = "jdbc:mysql://localhost:3306/mydatabase"; // 数据库URL
        String username = "root"; // 数据库用户名
        String password = "password"; // 数据库密码
        
        // 连接数据库
        try {
            Connection connection = DriverManager.getConnection(url, username, password);
            
            // 执行SQL查询
            Statement statement = connection.createStatement();
            String sql = "SELECT * FROM mytable";
            ResultSet resultSet = statement.executeQuery(sql);
            
            // 处理查询结果
            while (resultSet.next()) {
                int id = resultSet.getInt("id");
                String name = resultSet.getString("name");
                System.out.println("ID: " + id + ", Name: " + name);
            }
            
            // 关闭连接
            resultSet.close();
            statement.close();
            connection.close();
            
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}