Java 重定向和重定向内部模型和视图之间的区别
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difference between redirect and redirect inside modelandview
提问by Monicka Akilan
In spring controller class to redirect to a url
在 spring 控制器类中重定向到一个 url
some places all using
return "redirect:/abc.htm";.also using
return new ModelAndView("redirect:/abc.htm").
一些地方都使用
return "redirect:/abc.htm";.也使用
return new ModelAndView("redirect:/abc.htm").
Any one please explain the difference and similarities of both statements.
请任何人解释这两种说法的异同。
And in which situation it has to use.
以及它必须在哪种情况下使用。
Rohit:
罗希特：
Am using RedirectAttribute to get values from old url.
In this case am getting value while using this return "redirect:/abc.htm";but not in this return new ModelAndView("redirect:/abc.htm").
Is there any difference in RedirectAttributes
我正在使用 RedirectAttribute 从旧 url 获取值。在这种情况下，我在使用 this 时获得了价值，return "redirect:/abc.htm";但在 this 中却没有 return new ModelAndView("redirect:/abc.htm")。
有什么区别吗RedirectAttributes
采纳答案by Debojit Saikia
The statements:
声明：
return "redirect:/abc.htm"
return new ModelAndView("redirect:/abc.htm")
do the same thing: redirectsthe request to abc.htm. If a view name is returned that has the
prefix redirect:, this is recognized as a special indication that a redirect is needed. The rest of the view name will be treated as the redirect URL.
做同样的事情：redirects请求abc.htm. 如果返回具有前缀的视图名称，则将redirect:其识别为需要重定向的特殊指示。视图名称的其余部分将被视为重定向 URL。
With the statement
随着声明
return "redirect:/abc.htm"
you can only return the redirect view name.
您只能返回重定向视图名称。
With ModelAndViewyou can return both modeland viewin a single return value:
随着ModelAndView你便可返回model，并view在一个单一的返回值：
ModelAndView modelAndView = new ModelAndView("redirect:/abc.htm");
modelAndView.addObject("modelAttribute" , new ModelAttribute());
return modelAndView;
But the attribute value will not be available in the new redirect request that the client(browser) will make for the URL /abc.htm. The best use of ModelAndViewis when you forward the request to a new URL, so that you can return both modeland viewtogether in a single return value. For redirect scenarios, if you want to pass attributes, you should use RedirectAttributes.
但是该属性值在客户端（浏览器）为 URL 发出的新重定向请求中将不可用/abc.htm。最好的使用ModelAndView是当你将请求转发到一个新的URL，这样就可以同时返回model，并view在一个单一的返回值在一起。对于重定向场景，如果你想传递属性，你应该使用RedirectAttributes.
