ExternalContext#redirect()不会重定向到父目录 [英] ExternalContext#redirect() does not redirect to parent directory
问题描述
我有两页:
String page1 = "user/newuser.jsf";
String page2 = "department/newdepartment.jsf";
如果我这样重定向到page1:
FacesContext.getCurrentInstance().getExternalContext().redirect(page1);
URL更改为localhost:8080/NavFile/user/newuser.jsf.
在此页面上，我重定向到page2:
On this page I redirect to page2:
FacesContext.getCurrentInstance().getExternalContext().redirect(page2);
URL更改为localhost:8080/NavFile/user/department/newdepartment.jsf.但是我的应用程序中没有user/department目录.我的目标是重定向到localhost:8080/NavFile/department/newdepartment.jsf.
URL changes to localhost:8080/NavFile/user/department/newdepartment.jsf. But there is no user/department directory in my application. My goal was to redirect to localhost:8080/NavFile/department/newdepartment.jsf.
这是怎么引起的，我该如何解决?
How is this caused and how can I solve it?
推荐答案
相对重定向URL(即，当不以/或scheme开头时)相对于当前请求URL(最终用户在浏览器的地址栏中看到) .相对于服务器端的上下文路径而言，这并不是神奇的，因为此信息在客户端是完全未知的(您知道，重定向是由Web浏览器执行的，而不是由Web服务器执行的.)
A relative redirect URL (i.e. when not starting with / or scheme) is relative to the current request URL (as the enduser sees in browser's address bar). It's not magically relative to the context path in the server side as this information is completely unknown in the client side (you know, a redirect is performed by the webbrowser, not by the webserver).
如果要相对于上下文路径进行重定向，则应包括上下文路径，以使其成为相对于域的路径.您可以通过 ExternalContext#getRequestContextPath() .
If you want to redirect relative to the context path, then you should include the context path so that it becomes domain-relative. You can get the context path dynamically via ExternalContext#getRequestContextPath().
ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
ec.redirect(ec.getRequestContextPath() + "/" + page1);
对于page2，完整的重定向URL将变为/user/department/newdepartment.jsf，而斜杠/将使其相对于域http://localhost:8080，这正是您想要的.
In case of page2, the full redirect URL becomes /user/department/newdepartment.jsf and the leading slash / would make it relative to the domain http://localhost:8080, which is exactly what you want.
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