JSF-从@PostConstruct重定向后保留Faces消息

问题描述

我有page1，该按钮具有导航到page2的按钮，第2页添加了一些消息并导航回到page1.我想在第1页上显示这些消息.我尝试了许多解决方案，但没有任何效果.

I have page1 with button that navigates to page2, page 2 add some messages and navigates back to page1. I want display those messages on page1. I've tried many solutions, but nothing work.

示例代码page1.xhtml:

Sample code page1.xhtml:

<p:commandButton value="edit" action="#{bean1.edit}"/>

在托管bean中:

public String edit() {
  return "page2?faces-redirect=true";
}

page2托管bean

page2 managed bean

@PostConstruct
private void postConstruct() {
  Faces.getFlash().setKeepMessages(true);
  Messages.addFlashGlobalError("cannot edit!");
  Faces.navigate("page1?faces-redirect=true");
}

两个bean都具有视图作用域，并且两个页面的正文末尾都有<p:messages>.

Both beans are view scoped and both pages have <p:messages> at the end of body.

推荐答案

首先，我不完全确定@PostConstruct是执行重定向的最佳位置.参见此.话虽如此，Google出现了此，看起来很合理.尝试在Facelets页面本身内使用页面顶部附近的preRender事件标签进行重定向.干杯

First of all, I'm not entirely sure that the @PostConstruct is the best place to perform a redirect. See this. That being said, google turned up this and it looks reasonable. Try redirecting within the facelets page itself with a preRender event tag close to the top of the page. Cheers

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