我想使用spring-boot-starter-data-jpa功能来创建非Web应用程序。 在52.4文档中说:
您希望作为业务逻辑运行的应用程序代码 作为CommandLineRunner实现并作为一个进入上下文 @Bean定义。
我的 AppPrincipalFrame 如下所示:
@Component
public class AppPrincipalFrame extends JFrame implements CommandLineRunner{
private JPanel contentPane;
@Override
public void run(String... arg0) throws Exception {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
AppPrincipalFrame frame = new AppPrincipalFrame();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
启动应用程序类看起来像:
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application {
public static void main(String[] args) {
ApplicationContext context = SpringApplication.run(Application.class, args);
AppPrincipalFrame appFrame = context.getBean(AppPrincipalFrame.class);
}
}
但是不起作用。有人有这方面的样品吗?
已编辑并添加例外。
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'appPrincipalFrame'.
Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [es.adama.swing.ui.AppPrincipalFrame]: Constructor threw exception; nested exception is java.awt.HeadlessException
问候。
答案 0 :(得分:33)
自从您发布问题以来已经有一段时间了,但我在一个旧项目中遇到了同样的问题,我正在迁移并想出一个不同的方式,我认为更清楚,事情有效。
您可以使用<body>
<form id="form1" runat="server">
<div class="form-horizontal">
<h4>Please add your information</h4>
<hr />
<asp:ValidationSummary runat="server" CssClass="text-danger" />
<div class="form-group form-horizontal col-md-8">
<asp:Label ID="lblName" runat="server" AssociatedControlID="txtName" Text="Name" CssClass="col-md-2 control-label"></asp:Label>
<div class="col-md-6">
<asp:TextBox ID="txtName" runat="server" CssClass="form-control"></asp:TextBox>
</div>
<br />
<br />
<asp:Label ID="lblLastName" runat="server" AssociatedControlID="txtLastName" Text="Last Name" CssClass="col-md-2 control-label"></asp:Label>
<div class="col-md-6">
<asp:TextBox ID="txtLastName" runat="server" CssClass="form-control"></asp:TextBox>
</div>
<br />
<br />
<asp:Label runat="server" AssociatedControlID="Address1" CssClass="col-md-2 control-label" Text="Address1"></asp:Label>
<div class="col-md-6">
<asp:TextBox runat="server" ID="Address1" CssClass="form-control" />
</div>
<br />
<br />
<asp:Label runat="server" AssociatedControlID="Address2" CssClass="col-md-2 control-label" Text="Address2"></asp:Label>
<div class="col-md-6">
<asp:TextBox runat="server" ID="Address2" CssClass="form-control" />
</div>
<br />
<br />
<asp:Label ID="lblCity" runat="server" AssociatedControlID="txtCity" Text="City" CssClass="col-md-2 control-label" Font-Bold="true"></asp:Label>
<div class="col-md-6">
<asp:TextBox runat="server" ID="txtCity" CssClass="form-control" />
</div>
<br />
<br />
<div class="form-group">
<asp:Label ID="lblState" runat="server" AssociatedControlID="txtState" Text="State" CssClass="col-md-2 control-label" Font-Bold="true"></asp:Label>
<div class="col-md-2">
<asp:TextBox runat="server" ID="txtState" CssClass="form-control" />
</div>
<asp:Label ID="lblZip" runat="server" AssociatedControlID="txtZip" Text="Zip" CssClass="col-md-2 control-label" Font-Bold="true"></asp:Label>
<div class="col-md-2">
<asp:TextBox runat="server" ID="txtZip" CssClass="form-control" />
</div>
</div>
<asp:Label ID="lblCountry" runat="server" AssociatedControlID="ddCountry" Text="Country" CssClass="col-md-2 control-label" Font-Bold="true"></asp:Label>
<div class="col-md-6">
<asp:DropDownList ID="ddCountry" runat="server" CssClass="form-control"></asp:DropDownList>
</div>
</div>
<div class="form-group">
<div class="col-md-offset-4 col-md-2">
<asp:Button ID="btnSubmit" runat="server" Text="Send" CssClass="btn btn-primary" />
</div>
</div>
</div>
</form>
而不是使用SpringApplication.run(Application.class, args);
,并且不必使玩具应用程序类从JFrame扩展。因此代码看起来像:
new SpringApplicationBuilder(Main.class).headless(false).run(args);
答案 1 :(得分:7)
Swing应用程序必须放在Swing事件队列中。 不这样做是一个严重的错误。
所以正确的方法:
public static void main(String[] args) {
ConfigurableApplicationContext ctx = new SpringApplicationBuilder(SwingApp.class)
.headless(false).run(args);
EventQueue.invokeLater(() -> {
SwingApp ex = ctx.getBean(SwingApp.class);
ex.setVisible(true);
});
}
此外,我们可以使用@SpringBootApplication
注释。
@SpringBootApplication
public class SwingApp extends JFrame {
有关完整的工作示例,请参阅我的Spring Boot Swing integration教程。
答案 2 :(得分:2)
另一种简单优雅的解决方案是禁用无头属性,如图here.所示 但是,在创建/显示JFrame之前,您将不得不这样做。
System.setProperty("java.awt.headless", "false"); //Disables headless
所以,对我有用的东西:
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);
});
MyClass.class中的注释(我不知道它们是否起任何作用):
@SpringBootApplication
@EnableWebMvc
答案 3 :(得分:0)
//@Component
public class SwingApp extends JFrame {
vv...
}
@SpringBootApplication
public class Application {
public static void main(String[] args) {
ConfigurableApplicationContext ctx = new SpringApplicationBuilder(Application.class)
.headless(false).run(args);
SwingApp sw = new SwingApp();
sw.setVisible(true);
}
}
//@Component
public class SwingApp extends JFrame {
vv...
private void jButtonRunSpringServer(java.awt.event.ActionEvent evt){
String [] args = {"abc","xyz"};
Application.runSpringServer(args);
}
}
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SwingApp sw = new SwingApp();
sw.setVisible(true);
}
public static void runSpringServer(String[] args) {
/*
ConfigurableApplicationContext ctx = new SpringApplicationBuilder(Application.class)
.headless(false).run(args);
*/
SpringApplication.run(Application.class, args);
}
}