Java 以编程方式获取当前页面
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Get current page programmatically
提问by Ingo Fischer
In a JSF backing bean (Managed Bean, Weld Bean, doesn't matter), I can get the context path the client is on by calling
在 JSF 支持 bean（托管 Bean、焊接 Bean 无关紧要）中，我可以通过调用获取客户端所在的上下文路径
FacesContext ctx = FacesContext.getCurrentInstance();
String path = ctx.getExternalContext().getRequestContextPath();
This gives me the path the client currently accesses, like /myapplication.
Is it also possible to get the current page, like /home.faces, and how?
这为我提供了客户端当前访问的路径，例如/myapplication. 是否也可以获取当前页面，例如/home.faces，以及如何获取？
采纳答案by BalusC
You normally want to use UIViewRoot#getViewId()for this.
您通常希望UIViewRoot#getViewId()用于此目的。
String viewId = facesContext.getViewRoot().getViewId();
This is in EL also available as follows:
这在 EL 中也可用，如下所示：
#{view.viewId}
Exactly this value is reuseable in navigation case outcomes such as <h:link outcome>and <h:button outcome>.
正是这个值可以在导航案例结果中重用，例如<h:link outcome>和<h:button outcome>。
Alternatively, you can also use HttpServletRequest#getRequestURI()to get whatever the enduser is actually seeing in the browser address bar.
或者，您也可以使用HttpServletRequest#getRequestURI()获取最终用户在浏览器地址栏中实际看到的任何内容。
String uri = ((HttpServletRequest) externalContext.getRequest()).getRequestURI();
Which is in EL also available as follows:
这在 EL 中也可用，如下所示：
#{request.requestURI}
Exactly this value is reuseable in <h:outputLink value>or plain <a href>. Note that you can't use it as navigation case outcome.
正是这个值可以在<h:outputLink value>或 plain 中重用<a href>。请注意，您不能将其用作导航案例结果。
回答by Ingo Fischer
Ok, got it, it's
好的，明白了，就是
FacesContext ctx = FacesContext.getCurrentInstance();
HttpServletRequest servletRequest = (HttpServletRequest) ctx.getExternalContext().getRequest();
// returns something like "/myapplication/home.faces"
String fullURI = servletRequest.getRequestURI();
回答by Catfish
String uri = ((HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest()).getRequestURI();
回答by jsina
String str = ((HttpServletRequest) FacesContext.getCurrentInstance()
.getExternalContext().getRequest()).getRequestURI();
System.out.println(str);
