Redirect to an external URL from controller action in Spring MVC

java, jsp, spring, spring-mvc

Solution

You can do it with two ways.

First:

@RequestMapping(value = "/redirect", method = RequestMethod.GET)
public void method(HttpServletResponse httpServletResponse) {
    httpServletResponse.setHeader("Location", projectUrl);
    httpServletResponse.setStatus(302);
}

Second:

@RequestMapping(value = "/redirect", method = RequestMethod.GET)
public ModelAndView method() {
    return new ModelAndView("redirect:" + projectUrl);
}

Problem

I have noticed the following code is redirecting the User to a URL inside the project, ``` @RequestMapping(method = RequestMethod.POST) public String processForm(HttpServletRequest request, LoginForm loginForm, BindingResult result, ModelMap model) { String redirectUrl = "yahoo.com"; return "redirect:" + redirectUrl; } ``` whereas, the following is redirecting properly as intended, but requires http:// or https:// ``` @RequestMapping(method = RequestMethod.POST) public String processForm(HttpServletRequest request, LoginForm loginForm, BindingResult result, ModelMap model) { String redirectUrl = "http://www.yahoo.com"; return "redirect:" + redirectUrl; } ``` I want the redirect to always redirect to the URL specified, whether it has a valid protocol in it or not and do not want to redirect to a view. How can I do that? Thanks,

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