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我使用Vaadin创建一个新的登录表单。我有两个类,如下所示:在Vaadin中登录表单
LoginUI.java是引入包含Login页面代码的LoginView.java的基类。它仍然是一个原型,并没有实现听众。但是,当我在tomcat上部署和运行时,我看到没有显示任何事件的空白页面。有人可以帮忙吗?
LoginUI.java - 基类
public class LoginUI extends UI {
@WebServlet(value = "/*", asyncSupported = true)
@VaadinServletConfiguration(productionMode = false, ui = LoginUI.class)
public static class Servlet extends VaadinServlet {
}
@Override
protected void init(VaadinRequest request) {
LoginView view = new LoginView();
setContent(view);
}
}
LoginView.java
public class LoginView extends VerticalLayout implements ClickListener {
/**
*
*/
private static final long serialVersionUID = 1L;
private final Label feedback;
private final TextField username;
private final TextField password;
private final Button registerBtn;
private final Button loginBtn;
private HorizontalLayout layout= new HorizontalLayout();
public LoginView() {
feedback = new Label();
layout.addComponent(feedback);
username = new TextField("Username");
username.setWidth("100%");
username.setNullRepresentation("");
layout.addComponent(username);
password = new TextField("Password");
password.setWidth("100%");
password.setNullRepresentation("");
layout.addComponent(password);
loginBtn = new Button("Sign In");
layout.addComponent(loginBtn);
registerBtn = new Button("Register");
layout.addComponent(registerBtn);
setSizeFull();
}
public void buttonClick(ClickEvent event) {
if (event.getButton().equals(loginBtn)) {
String username = (String) this.username.getValue();
String password = (String) this.password.getValue();
Notification.show("User Present");
}
}
}