如果在“beforePhase”方法中发生异常，如何重定向到“ErrorPage”？

Question

如何重定向到＆＃34; ErrorPage＆＃34;如果在＆＃34; beforePhase＆＃34;？中发生异常。当我试图重新指示它给我一个＆＃34;响应已经承诺＆＃34;。

此致 拉吉

Answer 1

检查以下代码是否对您有帮助，

public void beforePhase(PhaseEvent e)
{
 try
  {
    //if something doesn't work here

  } 
  catch(Exception e)
  {
    System.out.println("Exception ocurred in beforePhase method");
    FacesContext context = FacesContext.getCurrentInstance();
            ExternalContext externalContext = context.getExternalContext();
            UIViewRoot newPage = context.getApplication().getViewHandler().createView(context,"/pages/techErrorPage.jsf");
            context.setViewRoot(newPage);
            context.renderResponse();
  }
}