从jsp重定向jsp - 错误“请求的资源不可用。” [英] Redirect jsp from jsp - error "The requested resource is not available."

问题描述

我正在社交网站上工作，我遇到以下问题。在 profile.jsp 我有一个用户可以上传照片的表单。此表单有一个 FileUploadHandler servlet的操作，它上传照片，然后将重定向发送到 uploadfileController.jsp ，如下所示：

I'm working on a social networking site and I have the following problem. In profile.jsp I have a form where the user can upload a photo. This form has an action to FileUploadHandler servlet which uploads the photo and then sends redirect to uploadfileController.jsp like this:

RequestDispatcher requestDispatcher;
requestDispatcher = request.getRequestDispatcher("/uploadfileController.jsp");
requestDispatcher.forward(request, response);

在 uploadfileController.jsp 我插入这篇文章进入我的MySQL数据库，我发送重定向到 profile.jsp 。

In uploadfileController.jsp I insert this post into my MySQL database and I send redirect to profile.jsp.

response.sendRedirect("/profile.jsp");

然后我收到此错误消息：

But then I get this error message:

HTTP状态404 - /profile.jsp

HTTP Status 404 - /profile.jsp

类型状态报告

消息/profile.jsp

message /profile.jsp

描述请求的资源不可用。

description The requested resource is not available.

但是，当我再次去 profile.jsp 时，帖子就会被创建！任何想法？

However, when I go again to profile.jsp the post is created! Any ideas?

推荐答案

如果响应是相对于servlet上下文的，那么将上下文路径预先添加到URL。

If the response is relative to servlet context then prepend context path to the URL.

String contextPath = request.getContextPath();
response.sendRedirect(response.encodeRedirectURL(contextPath + "/profile.jsp"); 

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