permanent 301 redirect in Tomcat 5.5

Is it possible to do 301 redirect with Tomcat 5.5 running standalone, not behind IIS/Apache?

回答1:

There isn't a way to set this up as easily as you're able to with Apache. The closest thing would be to make a servlet or jsp to handle the redirect and then map it to the URL you want to redirect from. In the servlet or jsp it would do something like:

response.setStatus(301);
response.setHeader("Location", "http://www.example.com/redirect-to-here.html" );

回答2:

To redirect entire folder to new location you need both a JSP and configuration to call this jsp upon 404.

In index.jsp you need to modify your redirect behavior. Below code would redirect from OldApp folder to NewApp folder on the same server.

index.jsp:

<!DOCTYPE html>
<html lang="en-US">
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>301 Moved</title>
</head>
<%@ page import="org.apache.catalina.util.RequestUtil" %>
<%
    // get the requested URI
    //String requestedLocation = request.getRequestURI();
    // original request
    String requestedLocation = RequestUtil.filter((String) request.getAttribute("javax.servlet.error.request_uri"));
    // rewrite to new location
    String newLocation = requestedLocation.replaceAll("^/OldApp", "/NewApp");
    // add query string
    String query = request.getQueryString();
    if (!query.isEmpty()) {
        newLocation = newLocation + '?' + query;
    }

    // 301 - permanent redirect
    response.setStatus(response.SC_MOVED_PERMANENTLY);
    response.setHeader("Location", newLocation);
%>
<body>
    &rarr; <a href="<%=newLocation%>"><%=newLocation%></a>
</body>
</html>

WEB-INF/web.xml:

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
  version="3.0"
  metadata-complete="true">

  <error-page>
    <error-code>404</error-code>
    <location>/index.jsp</location>
  </error-page>
</web-app>