Tomcat6 response.sendRedirect（）404错误
[英]Tomcat6 response.sendRedirect() 404 error
问题描述
I was wondering if anyone has experienced this problem I am having and, if so whether they could provide me with a solution. 
我想知道是否有人遇到过我遇到的这个问题，如果可以，那么他们是否可以为我提供解决方案。
I have an 'index.jsp' page which sits outside the WEB-INF folder and consists of the following code: 我有一个'index.jsp'页面，它位于WEB-INF文件夹之外，并包含以下代码：
<html>
<body>
<%response.sendRedirect("home.htm");%>
</body>
</html>
The page should redirect to 'home.jsp' which sits inside the WEB-INF folder. 该页面应重定向到WEB-INF文件夹中的“ home.jsp”。
The problem i am experiencing is that when I deploy my application in tomcat using Eclipse, the redirect works! 我遇到的问题是，当我使用Eclipse在tomcat中部署应用程序时，重定向有效！
However, when i launch my application in tomcat by running 'startup.sh' from within the tomcat/bin folder I get a 'HTTP Status 404' error. 但是，当我通过在tomcat / bin文件夹中运行“ startup.sh”在tomcat中启动应用程序时，出现“ HTTP状态404”错误。
I am using tomcat 6.0.33 我正在使用tomcat 6.0.33
4 个解决方案
解决方案1
1 2012-01-04 16:14:39
Files in /WEB-INF folder are not publicitly accessible. /WEB-INF文件夹中的文件不能公开访问。 That folder is intented for resources which are not supposed to be accessed directly by the webbrowser, such as JSP include files, JSP files which require a preprocessing (front controller) servlet , etcetera. 该文件夹专用于不应由Web浏览器直接访问的资源，例如JSP包含文件，需要预处理（前端控制器） Servlet的 JSP文件等。
Your home.jsp seem to be just a normal JSP file which is intented to be accessed directly by URL. 您的home.jsp似乎只是一个普通的JSP文件，旨在通过URL直接访问。 So, put it outside the /WEB-INF folder. 因此，将其放在 /WEB-INF文件夹之外。 This way it's just available by http://localhost:8080/context/home.jsp . 这样， http：// localhost：8080 / context / home.jsp就可以使用它。
As to your concrete requirement, letting index.jsp redirect to something else makes really no sense. 至于您的具体要求，让index.jsp重定向到其他对象确实没有任何意义。 Just change the <welcome-file> setting in web.xml to be home.jsp instead of index.jsp . 只需将web.xml的<welcome-file>设置更改为home.jsp而不是index.jsp 。
<welcome-file-list>
<welcome-file>home.jsp</welcome-file>
</welcome-file-list>
This way the home.jsp will be opened when the enduser visits http://localhost:8080/context folder directly without specifying any resource file. 这样，当最终用户直接访问http：// localhost：8080 / context文件夹而不指定任何资源文件时，将打开home.jsp 。
Oh, please note that the .htm extension is not the same as .jsp extension. 哦，请注意.htm扩展名与.jsp扩展名不同。 Fix that accordingly as well, if necessary. 如有必要，请相应地进行修复。
解决方案2
0 2012-01-03 23:54:12
如果要重定向到“ home.jsp”，则必须将“ home.jsp”编写为sendRedirect参数。
解决方案3
0 2012-01-04 00:00:10
First of all, the initial page to go to is controlled in the web.xml file by the element. 首先，要访问的初始页面在web.xml文件中由元素控制。 In stand-alone Tomcat, this defaults to /index.html, then /index.htm, and finally /index.jsp. 在独立的Tomcat中，默认值是/index.html，然后是/index.htm，最后是/index.jsp。
It may be that when you start tomcat from within Eclipse, the web plugin does it's own thing with the default web.xml and so the defaults may be slightly different. 可能是当您从Eclipse中启动tomcat时，Web插件使用默认的web.xml来完成此事，因此默认值可能会略有不同。
Secondly, If you just want index.jsp to redirect to home.htm, you shouldn't wrap the scriptlet with HTML markup tags. 其次，如果只希望index.jsp重定向到home.htm，则不应使用HTML标记标签包装scriptlet。 If tomcat decides to flush the output before your scriptlet is executed, the sendRedirect() method will be ignored, as the HTTP headers will have already been written. 如果tomcat决定在执行scriptlet之前刷新输出，则将忽略sendRedirect（）方法，因为已经编写了HTTP标头。
Finally, I assume that you have some kind of mapping set up in your web application that handles the 'home.htm' request and forwards to home.jsp? 最后，我假设您在Web应用程序中设置了某种映射，该映射可以处理“ home.htm”请求并转发给home.jsp？
解决方案4
0 2012-01-04 00:12:11
Why are you expecting it to redirect to home.jsp when the argument to sendRedirect is home.htm ? 当sendRedirect的参数为home.htm时，为什么期望它重定向到home.jsp ？ Is there a typo? 有错字吗？ If the file is in fact under WEB-INF , it will not be accessible to the browser. 如果文件实际上在WEB-INF ，则浏览器将无法访问该文件。 Exposing the contents of WEB-INF to the world would open up numerous potential security holes. 将WEB-INF的内容暴露给全世界将打开许多潜在的安全漏洞。 You would need to do the following if you want home.jsp to include the contents of WEB-INF/home.htm : 如果希望home.jsp包含WEB-INF/home.htm的内容，则需要执行以下操作：
<jsp:include page="/WEB-INF/home.htm" />
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