Java Servlet响应未完成求助：重定向后GET请求无法结束

Hey there, let's break down this IE-specific issue you're hitting—older browsers like IE have some quirky behavior around redirects and HTTP connections that often cause this kind of confusion. Here are the most likely fixes to try:

1. Fix Response Headers for IE's Connection Handling #

IE sometimes holds connections open longer than expected if your servlet doesn't explicitly tell it to close the connection or disable caching. Add these headers in servlet2 to force proper cleanup:

// Ensure connection closes after response
response.setHeader("Connection", "close");
// Disable caching to prevent IE from hanging onto stale connections
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);

2. Verify Your Servlet2 Response is Fully Completed #

Make sure you're properly flushing and closing the output stream/writer in servlet2. If the stream isn't closed cleanly, IE might think the request is still in progress. Use try-with-resources to auto-manage the writer:

try (PrintWriter out = response.getWriter()) {
    // Write your response content here
    out.write("Hello from Servlet2!");
    out.flush(); // Ensure all content is sent immediately
} // Auto-closes the writer when done

Avoid leaving open streams or forgetting to flush—this is a common culprit for hanging requests in IE.

3. Use the Correct Redirect Status Code #

When redirecting after a POST request, using 303 See Other is more standards-compliant than the default 302 Found for telling browsers to use GET for the follow-up request. Update servlet1's redirect code to:

// Explicitly set 303 status for POST->GET redirect
response.setStatus(HttpServletResponse.SC_SEE_OTHER);
response.setHeader("Location", "/servlet2");
// Alternatively, sendRedirect() uses 302 by default, but 303 is safer for IE
// response.sendRedirect("/servlet2");

IE handles 303 redirects more consistently for POST-to-GET workflows, which might resolve the hanging request issue.

4. Rule Out IE DevTools False Positive #

Sometimes IE's F12 tools have bugs where they incorrectly mark requests as "unfinished" even when the server has sent a complete response. To confirm:

• Add server-side logs in servlet2 to verify when the response is fully sent to the client.
• Check if the browser actually renders the content correctly—if it does, the request is likely completed, and the dev tool is showing a false status.

内容的提问来源于stack exchange，提问作者C4PRiC0RN