HttpServletResponse sendRedirect永久 [英] HttpServletResponse sendRedirect permanent

问题描述

这将使用临时 302 HTTP状态代码重定向请求：

This will redirect a request with a temporary 302 HTTP status code:

HttpServletResponse response;
response.sendRedirect("http://somewhere");

但是可以使用永久 301 HTTP状态代码重定向它？

But is it possible to redirect it with a permanent 301 HTTP status code?

推荐答案

您需要设置响应状态和位置标题手动。

You need to set the response status and the Location header manually.

response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
response.setHeader("Location", "http://somewhere/");

在 sendRedirect（）之前设置状态不能用 sendRedirect（）将其覆盖到 SC_FOUND 之后。

Setting the status before sendRedirect() won't work as sendRedirect() would overridde it to SC_FOUND afterwards.

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