从Spring MVC中的控制器操作重定向到外部URL

问题描述

我注意到以下代码将用户重定向到项目内的URL，

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;
}

然而，以下是按预期正确重定向，但需要http：//或者https：//

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;
    }

我希望重定向始终重定向到指定的URL，无论它是否有是否有效的协议，不想重定向到视图。我怎么能这样做？

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?

谢谢，

推荐答案

你可以用两种方式做到这一点。

You can do it with two ways.

首先：

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

第二名：

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

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