servlet的根URl [英] Root URl of the servlet

问题描述

我想从其中一个servlet获取我的Web应用程序的根URL。

I want to get the root url of my web application from one of the servlet.

如果我在www.mydomain.com中部署我的应用程序，我想要获取 http://www.mydomain.com 之类的根网址。

If I deploy my application in "www.mydomain.com" I want to get the root url like "http://www.mydomain.com".

如果我在8080端口的本地tomcat服务器上部署它应该给出 http：// localhost：8080 / myapp

Same thing if I deploy it in local tomcat server with 8080 port it should give http://localhost:8080/myapp

有人能告诉我如何从servlet获取我的Web应用程序的根URL吗？

Can anyone tell me how to get the root URL of my web application from servlet?

public class MyServlet extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        String rootURL="";
        //Code to get the URL where this servlet is deployed

    }
}

推荐答案

您确实意识到URL客户端看到（和/或键入其浏览器），并且您的servlet部署在容器上的URL可以是非常不同？

You do realize that the URL client sees (and/or types into his browser) and the URL served by the container your servlet is deployed on can be very different?

但是，为了获得后者，你可以在 HttpServletRequest ：

In order to get the latter, though, you have a few methods available on HttpServletRequest:

• 您可以调用 getScheme（）， getServerName（）， getServerPort（）和 getContextPath（）并使用适当的分隔符组合它们


• 或者你可以调用 getRequestURL （）并从中删除 getServletPath（）和 getPathInfo（）。

• You can either call getScheme(), getServerName(), getServerPort() and getContextPath() and combine them using appropriate separators
• OR you can call getRequestURL() and remove getServletPath() and getPathInfo() from it.

这篇关于servlet的根URl的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！