Spring Boot 启动时报告错误：优雅地向用户展示启动失败信息

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.ConfigurableApplicationContext;

import javax.swing.*;
import java.awt.*;

@SpringBootApplication
public class MyApplication extends JFrame {

    public static void main(String[] args) {
        ConfigurableApplicationContext ctx = new SpringApplicationBuilder(MyApplication.class)
                .headless(false)
                .run(args);

        EventQueue.invokeLater(() -> {
            MyApplication ex = ctx.getBean(MyApplication.class);
            ex.setVisible(true);
        });
    }

    public MyApplication() {
        // 模拟启动失败的情况，实际应用中替换为真正的错误检测逻辑
        boolean startupFailed = true;

        if (startupFailed) {
            var pane = getContentPane();
            JOptionPane.showMessageDialog(pane, "应用启动失败，请检查配置或数据库连接！", "启动错误", JOptionPane.ERROR_MESSAGE);
            System.exit(1); // 退出程序
        } else {
            // 应用正常启动后的逻辑
            var pane = getContentPane();
            JOptionPane.showMessageDialog(pane, "应用启动成功！", "启动成功", JOptionPane.INFORMATION_MESSAGE);
        }
    }
}