如何在数组中获取存储过程输出值

CREATE PROCEDURE get_output_value(IN input_value INT, OUT output_value INT)
BEGIN
    SET output_value = input_value * 2;
END

import java.sql.*;

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

        try (Connection conn = DriverManager.getConnection(url, username, password)) {
            // 调用存储过程
            try (CallableStatement stmt = conn.prepareCall("{CALL get_output_value(?, ?)}")) {
                // 设置输入参数
                stmt.setInt(1, 5);
                // 注册输出参数
                stmt.registerOutParameter(2, Types.INTEGER);
                // 执行存储过程
                stmt.execute();
                // 获取输出参数的值
                int outputValue = stmt.getInt(2);
                System.out.println("Output value: " + outputValue);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}