如何将请求从web1 / servlet转发到web2 / servlet？ [英] How to forward request from web1/servlet to web2/servlet?

问题描述

我有两个Web应用程序说web1和web2。我想将web1 / servlet1的请求转发到web2 / servlet2。可能吗？请帮忙！

I've two web applications say web1 and web2. I want to forward a request from web1/servlet1 to web2/servlet2. Is it possible? Please help!

推荐答案

这是一个分为两步的过程：

This is a two-step process:

1. 获取 ServletContext 代表 web2


2. 从对应 servlet2 的 ServletContext 获取 RequestDispatcher

1. Get hold of the ServletContext representing web2
2. Get the RequestDispatcher from that ServletContext corresponding to servlet2

所以，这样的话，来自 servlet1 ：

So, something like this, from inside servlet1:

ServletContext web1 = getServletContext();
ServletContext web2 = web1.getContext("/web2");
RequestDispatcher dispatcher = web2.getRequestDispatcher("/servlet2");
dispatcher.forward(request, response);

所有这一切都有一个很大的警告 - 容器可能没有配置为允许跨上下文转发，因为这是一个潜在的安全风险。如果是这种情况， getContext（web2）将返回 null 。

There's a big caveat to all of this - the container may not be configured to permit cross-context forwarding, since it's a potential security risk. If this is the case, getContext("web2") will return null.

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