如何在JSF中获取当前页面的URL? [英] How to get the URL of current page in JSF?

问题描述

有什么方法可以获取所加载页面的URL?

Is there any way to get the URL of the page which is loaded?

我想要加载的页面的URL，在我的控制器中，我将在init()方法中调用方法getUrlOfPage().

I would like the URL of the page which is loaded, in my controller i will call a method getUrlOfPage() in init() method .

我需要URL源来将其用作在其中导出上下文的输入.

I need the URL source to use it as a input for exporting the context in it.

如何获取页面的URL?

How to get the URL of the page?

推荐答案

HttpServletRequest 本身可通过 ExternalContext#getRequest()通过JSF API获得.

It's available by HttpServletRequest#getRequestURL() (with domain) or getRequestURI() (without domain). The HttpServletRequest itself is in turn available through JSF API via ExternalContext#getRequest().

因此，

public void someMethod() {
    HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest();
    String url = request.getRequestURL().toString();
    String uri = request.getRequestURI();
    // ...
}

或者，如果您正在使用CDI @Named来管理bean，并且您使用的是JSF 2.3或更高版本，那么也可以通过

Or, if you're using CDI @Named to manage beans, and you're on JSF 2.3 or newer, then this is also possible through javax.faces.annotation.ManagedProperty:

@Inject @ManagedProperty("#{request.requestURL}")
private StringBuffer url; // +setter

@Inject @ManagedProperty("#{request.requestURI}")
private String uri; // +setter

public void someMethod() {
    // ...
}

或者，如果您正在使用CDI @Named来管理Bean，那么在较旧的JSF版本上也可以这样做:

Or, if you're using CDI @Named to manage beans, then this is also possible, also on older JSF versions:

@Inject
private HttpServletRequest request;

public void someMethod() {
    String url = request.getRequestURL().toString();
    String uri = request.getRequestURI();
    // ...
}

或者，如果您仍在使用自JSF 2.3起已弃用的@ManagedBean，那么也可以通过

Or, if you're still using the since JSF 2.3 deprecated @ManagedBean, then this is also possible through javax.faces.bean.ManagedProperty (note that the bean can only be @RequestScoped!):

@ManagedProperty("#{request.requestURL}")
private StringBuffer url; // +setter

@ManagedProperty("#{request.requestURI}")
private String uri; // +setter

public void someMethod() {
    // ...
}

另请参见

• 以编程方式获取当前页面

See also

• Get current page programmatically

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