Spring MVC Controller Jump redirect pass-through parameter

1. Requirements BackgroundRequirement: The spring MVC Framework controller jumps between the controllers and needs to be redirected. There are several situations: without parameter jump, with the parameter splicing URL form jump, with parameters do not join parameters jump, the page can also be displayed. 2. WorkaroundThere is definitely a solution to the demand, a solution, explain the spring of the jump way a lot of, I just say some self-think good, common, spring-loaded some classes and methods. (1) I have a controller in the background to jump to another controller, why there is such a requirement, is the case. I have a list page, and then I will do a new operation, added in the background after the completion of I want to jump to the list page, do not need to pass parameters, List page default query all. Mode one: Use Modelandview

return new Modelandview ("Redirect:/tolist"); This way you can redirect to ToList

.

Way two: Return to Stringreturn "redirect:/tolist "; Other ways: There are many other ways, there is no introduction, such as response and so on. This is a redirect without parameters. (2) The second situation, the list page has query criteria, jump after my query conditions can not be discarded, so that need to take parameters, with parameters can be spliced URL way one: their own manual splicing Urlnew modelandview ("Redirect:/tolist? param1= "+value1+" &param2= "+value2", so there is a drawback, is that the Chinese can be garbled problem. Way two: With Redirectattributes, this is a relatively useful class to find here with its AddAttribute method, this actually redirects past after you look at the URL, is it automatically spell your URL for you. How to use:                      attr.addattribute ("param", value);                     return "redirect:/namespace/ Tocontroller ", so that in Tocontroller this method can be obtained by obtaining parameters of this parameter, and then passed to the page. The URL of the past is still the same as the way. (3) with parameters do not splice URL page can also get the value (the focus is this) generally I guess redirect to all want to use this way: @RequestMapping ("/save")

    public String Save (@ModelAttribute ("form") Bean form,redirectattributes attr)                     throws Exception { 

        string code =  service.save (form);         if (Code.equals (")") {             attr.addflashattribute ("Name", Form.getname ());              attr.addflashattribute ("Success" , "Add success!");             return "Redirect:/index";         }else{             attr.addattribute ("ProjectName", Form.getprojectname ());              attr.addattribute ("enviroment", Form.getenviroment ());              attr.addflashattribute ("msg", " Add Error! The error code is: "+rsp.getcode (). GetCode () +", Error: "+rsp.getcode (). GetName ());  &NBSp;          return "Redirect:/maintenance/toaddconfigcenter" ;        }    } 

@RequestMapping ("/index")

Public

String Save (@ModelAttribute ("form") Bean form,redirectattributes attr) throws Exce    ption {

return "Redirect:/main/list";

the page value is not used I said, directly with the EL expression can be obtained, the principle here is placed in the session, the session will jump to the page immediately after removing the object. So when you refresh, the value will be lost.

3. Summarize the bottom or two kinds of jumps, just spring has been encapsulated, so there are many different ways to jump, you can also seal one, you can use the most primitive response, there is no problem. All right, here we go. In fact, there is nothing, but know this is very simple, did not understand before, now understand, and everyone to share. Give me a message if you have any questions.

Spring MVC Controller Jump redirect pass-through parameter