java如何调用mysql的存储过程

DELIMITER //
CREATE PROCEDURE get_user_by_id(IN user_id INT, OUT user_name VARCHAR(255), OUT user_age INT)
BEGIN
    SELECT name, age INTO user_name, user_age FROM users WHERE id = user_id;
END //
DELIMITER ;

import java.sql.*;

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

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            // 准备调用存储过程
            CallableStatement cstmt = conn.prepareCall("{call get_user_by_id(?, ?, ?)}");

            // 设置输入参数
            cstmt.setInt(1, 1);

            // 注册输出参数
            cstmt.registerOutParameter(2, Types.VARCHAR);
            cstmt.registerOutParameter(3, Types.INTEGER);

            // 执行存储过程
            cstmt.execute();

            // 获取输出参数
            String userName = cstmt.getString(2);
            int userAge = cstmt.getInt(3);

            System.out.println("User Name: " + userName);
            System.out.println("User Age: " + userAge);

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}