从Spring MVC中的控制器操作重定向到外部URL

Question

我注意到以下代码将用户重定向到项目内的URL，

@RequestMapping(method = RequestMethod.POST)
public String processForm(HttpServletRequest request, LoginForm loginForm, 
                          BindingResult result, ModelMap model) 
{
    String redirectUrl = "yahoo.com";
    return "redirect:" + redirectUrl;
}

然而，以下内容已按预期正确重定向，但需要http：//或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;
    }

我希望重定向始终重定向到指

Answer 1

你可以通过两种方式来实现。

第一：

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

第二：

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