如何重定向到部署在本地服务器上的应用程序中的spring controller方法？

Question

On my local Tomcat server I develop few projects. One of them I write in Spring MVC. I want to redirect some request to another method of controller. I know that it's possible by use: return "redirect:/path/to/resource"; but if I have deployed app on Tomcat I have to use prefix like: return "redirect: /appname /path/to/resource"; . How to make it work on server with prefix and without?

Answer 1

It sounds like you're having trouble because you've got the app running as the root context in some environments and not in others. You can use the methods available on the HttpServletRequest and HttpServletResponse objects to do a redirect that is more environment independent. An example Spring controller method would look something like this:

@RequestMapping("/test")
public void test(HttpServletRequest request, HttpServletResponse response) throws IOException {
    String url = request.getScheme() + "://" + 
                 request.getServerName() + ":" + 
                 request.getServerPort() + 
                 request.getContextPath() + "/path/to/resource";
    response.sendRedirect(url);
}

The getContextPath part in particular solves the problem you're talking about, it will just return / if the app is running as the root context but will return /appname if the app is running as appname like in your example.