项目启动时检查环境，若认证未通过，弹框提示，且终止运行

package com.hhwy.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import javax.swing.*; @SpringBootApplication public class FtDemoApplication { public static void main(String[] args) { if("500".equals("code")){ JOptionPane.showConfirmDialog(null, "认证失败" , "错误", JOptionPane.OK_CANCEL_OPTION, JOptionPane.ERROR_MESSAGE); System.exit(-1); } SpringApplication.run(FtDemoApplication.class, args); } }