现在我正在研究primefaces UI是令人难以置信的，我想用它来构建我的网站所以现在我正在研究对话框，我想使用primefaces的requestcontext隐藏和取消隐藏对话框我怎么能实现这个？我在 stackoverflow 中搜索了相同的问题，发现了一些问题，但它对我不起作用，为了让一切都清楚，这是我的 register.jsf 代码：
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Insert title here</title>
<h:outputStylesheet library="css" name="style.css"/>
</h:head>
<h:body>
<p:panel toggleable="true" header="Registration" closable="true" closeTitle="back" styleClass="register-panel">
<h:form>
<h:panelGrid columns="2">
<h:outputLabel value="Firstname: " />
<p:inputText id="firstname" value="#{ register.firstName }" required="true" requiredMessage="Firstname cannot be blank">
<f:validateDoubleRange minimum="3" maximum="15" />
</p:inputText>
<h:outputLabel value="Middlename: " />
<p:inputText id="middlename" value="#{ register.middleName }" required="true" requiredMessage="Middlename cannot be blank">
<f:validateDoubleRange minimum="3" maximum="15" />
</p:inputText>
<h:outputLabel value="Lastname: " />
<p:inputText id="lastname" value="#{ register.lastName }" required="true" requiredMessage="Lastname cannot be blank">
<f:validateDoubleRange minimum="3" maximum="15" />
</p:inputText>
<p:commandButton type="button" update="errorFirst, errorMiddle, errorLast, ErrorD, confirmD" value="Register" actionListener="#{ register.Register }" />
<p:dialog width="350" modal="true" id="ErrorD" header="Error Registration" visible="true" maximizable="false" widgetVar="showErrorDialog">
<h:panelGrid columns="1">
<p:message for="firstname" id="errorFirst" />
<p:message for="middlename" id="errorMiddle" />
<p:message for="lastname" id="errorLast" />
</h:panelGrid>
</p:dialog>
<p:dialog width="350" modal="true" id="confirmD" header="Confirm Registration" visible="true" maximizable="false" widgetVar="showConfirmDialog">
<h:panelGrid columns="2">
<h:outputLabel value="Are you sure you want to save the records" />
<h:outputLabel value=""/>
<p:separator />
<p:separator />
<p:commandButton value="Ok, Sure" />
<p:commandButton value="Cancel" />
</h:panelGrid>
</p:dialog>
</h:panelGrid>
</h:form>
</p:panel>
</h:body>
</html>
这是我的注册豆：
package org.register;
import javax.annotation.PostConstruct;
import javax.faces.bean.*;
import javax.faces.event.ActionEvent;
import org.primefaces.context.RequestContext;
@ManagedBean(name="register")
@RequestScoped
public class registerBean {
private String firstName;
private String middleName;
private String lastName;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getMiddleName() {
return middleName;
}
public void setMiddleName(String middleName) {
this.middleName = middleName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public void Register(ActionEvent e){
RequestContext primeContext = RequestContext.getCurrentInstance();
if(getFirstName().equals("") || getMiddleName().equals("") || getLastName().equals("")){
primeContext.execute("showErrorDialog.show()");
}
else{
primeContext.execute("showConfirmDialog.show()");
}
}
}
我的代码没有任何错误，但问题是每次页面加载时，它已经调用了 2 对话框，我想要做的是在注册失败时打开第一个对话框，并在成功时打开第二个对话框。多谢你们。