Spring Boot java中线程“main”java.awt.Headless

Question

我尝试使用intellij运行netbeans IDE创建的JFrameForm，我从netbeans复制源代码并将其粘贴到新的java类中，并在主函数中创建对象并设置jframe包含的类的可见性并运行它，它给出了以下错误2019-09-21 17:36:31.363Exception in thread "main" java.awt.HeadlessExceptionat java.desktop/java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:208)INFO    at java.desktop/java.awt.Window.<init>(Window.java:548)4744    at java.desktop/java.awt.Frame.<init>(Frame.java:423)---     at java.desktop/java.awt.Frame.<init>(Frame.java:388)[       Thread-1]   at java.desktop/javax.swing.JFrame.<init>(JFrame.java:180)j.LocalContainerEntityManagerFactoryBean    at com.sunTravel.frontend.uiComponents.MainFrame.<init>    (MainFrame.java:19):   at com.sunTravel.frontend.FrontendApplication.main(FrontendApplication.java:12)Closing JPA EntityManagerFactory for persistence unit 'default'2019-09-21 17:36:31.364  INFO 4744 --- [       Thread-1] .SchemaDropperImpl$DelayedDropActionImpl :         HHH000477: Starting delayed evictData of schema as part of SessionFactory shut-down'2019-09-21 17:36:31.367  INFO 4744 --- [       Thread-1] com.zaxxer.hikari.HikariDataSource       :     HikariPool-1 - Shutdown initiated...2019-09-21 17:36:31.370  INFO 4744 --- [       Thread-1] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.Process finished with exit code 1我的源代码如下，如何解决这个问题？@SpringBootApplicationpublic class FrontendApplication {    public static void main(String[] args) {        SpringApplication.run(FrontendApplication.class, args);        MainFrame mf = new MainFrame();        mf.setVisible(true);    }}

Answer 1

尝试禁用无头属性，如下所示。 您必须在创建/显示 JFrame 之前执行此操作。

System.setProperty("java.awt.headless", "false"); //Disables headless

一个例子：

SpringApplication.run(MyClass.class, args);

System.setProperty("java.awt.headless", "false");

SwingUtilities.invokeLater(() -> {

    JFrame f = new JFrame("myframe");

    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    f.setVisible(true);

});

Answer 2

尝试这个

public static void main(String[] args) {

    SpringApplicationBuilder builder = new SpringApplicationBuilder(DemoApplication.class);

    builder.headless(false);

    builder.run(args);

    MainFrame mf = new MainFrame();

    mf.setVisible(true);

}