自定义 Facelets 错误页面
我有一个 Facelets(JSF 1.2 (myfaces)) Web 应用程序,我想自定义我的错误页面 - 当应用程序成熟时,这似乎是很自然的事情。 在这个过程中我真的很困惑。
我发现了以下内容:
我还没有找到自定义 Facelets 错误页面的方法。我还没找到模板在哪里。我已经找到了重写 ViewHandler 的解决方案,该 ViewHandler 会执行 sendRedirect()。我认为这应该可以在不编写代码的情况下完成,尤其是 ViewHandler。
我找到了一种方法来关闭 Facelets 的错误处理并使用 myFaces 的错误处理:
代码:
<context-param>
<param-name>facelets.DEVELOPMENT</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.ERROR_HANDLING</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.ERROR_TEMPLATE_RESOURCE</param-name>
<param-value>/pages/public/errorPage.jsf</param-value>
</context-param>
不幸的是,我似乎无法使 myFaces 找到 JSF 页面。我需要使用 jsf 页面,因为我想使用网站的布局,该布局分散在几个模板中。 来源: http://wiki.apache.org/myfaces/Handling_Server_Errors
- 我尝试了战斧解决方案:
web.xml:
<context-param>
<param-name>org.apache.myfaces.ERROR_HANDLING</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.ERROR_HANDLER</param-name>
<param-value>org.apache.myfaces.tomahawk.util.ErrorRedirectJSFPageHandler</param-value>
</context-param>
faces-config.xml:
<navigation-rule>
<from-view-id>*</from-view-id>
<navigation-case>
<from-outcome>java.lang.Throwable</from-outcome>
<to-view-id>/pages/public/errorPage.xhtml</to-view-id>
</navigation-case>
</navigation-rule>
来源:http://wiki.apache.org/myfaces/Handling_Server_Errors
- 我发现我可以通过
web.xml
中的
使用容器的错误处理。我成功转发到jsf错误页面。这里的问题是我无法显示异常 - 我不知道如何。
更新:我发现了如何使用 ManagedBean:
public class ErrorDisplayBean {
public String getStackTrace() {
FacesContext context = FacesContext.getCurrentInstance();
Map requestMap = context.getExternalContext().getRequestMap();
Throwable ex = (Throwable) requestMap.get("javax.servlet.error.exception");
...
}
}
请参阅 http://wiki。 apache.org/myfaces/Handling_Server_Errors 了解其余代码。
我想要完成的任务:我想使用 Facelets 的错误处理机制,而无需编写代码,并且能够在 jsf 页面上显示异常。如果这是不可能的,我想再次使用 myFaces 的错误处理并在异常中显示。我认为其中之一应该是可能的。
I have a Facelets(JSF 1.2 (myfaces)) web app and I want to customize my error page - which would seem to be a natural thing to do when an application matures.
I got really confused in the process.
I found the following:
I haven't found a way to customize Facelets' error page. I haven't found where the template is. I have found solutions with overriding the ViewHandler that would do sendRedirect(). I think this should be accomplishable without writing code, especially the ViewHandler.
I have found a way to switch off Facelets' error handling and using myFaces' one:
code:
<context-param>
<param-name>facelets.DEVELOPMENT</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.ERROR_HANDLING</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.ERROR_TEMPLATE_RESOURCE</param-name>
<param-value>/pages/public/errorPage.jsf</param-value>
</context-param>
Unfortunately I cannot seem to make myFaces find a JSF page. I need to use a jsf page because I want to use the site's layout which is fragmented over a few templates.
Source: http://wiki.apache.org/myfaces/Handling_Server_Errors
- I tried a tomahawk solution:
web.xml:
<context-param>
<param-name>org.apache.myfaces.ERROR_HANDLING</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.ERROR_HANDLER</param-name>
<param-value>org.apache.myfaces.tomahawk.util.ErrorRedirectJSFPageHandler</param-value>
</context-param>
faces-config.xml:
<navigation-rule>
<from-view-id>*</from-view-id>
<navigation-case>
<from-outcome>java.lang.Throwable</from-outcome>
<to-view-id>/pages/public/errorPage.xhtml</to-view-id>
</navigation-case>
</navigation-rule>
Source: http://wiki.apache.org/myfaces/Handling_Server_Errors
- I found that I can use the container's error-handling via
<error-page>
inweb.xml
. I successfully forwarded to a jsf error page. Here the problem is that I cannot display the Exception - I don't know how.
Update: I found out how - with a ManagedBean:
public class ErrorDisplayBean {
public String getStackTrace() {
FacesContext context = FacesContext.getCurrentInstance();
Map requestMap = context.getExternalContext().getRequestMap();
Throwable ex = (Throwable) requestMap.get("javax.servlet.error.exception");
...
}
}
see http://wiki.apache.org/myfaces/Handling_Server_Errors for the rest of the code.
What I want to accomplish: I want to use Facelets' error-handling mechanism without writing code and be able to display the Exception on a jsf page. If that is not possible, I'd like to use myFaces' error-handling again with displayin the Exception. I think one of them should be possible.
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我认为您仍然可以通过 web.xml 进行配置:
它也可以用于错误代码..
I think you can still make of configuration through your web.xml:
Which can be used for error codes too..