Rookie Learning SPRING--SPRINGMVC Annotation version control layer redirection to the control layer

I. Overview.

SPRINGMVC The interface request contorller1,contorller1 need to redirect to Contorller2 to show other pages or do some business logic, Spring provides this feature to use "redirect:/" for redirection.

second, the code demonstration.

1. Interface

login.jsp

<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "    pageencoding=" UTF-8 "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >
   
   
 
    
    
 login2.jsp  
 P>
      
    
    
 
    
    
<%@ page language=" java "contenttype=" text/html; Charset=utf-8 "pageencoding=" UTF-8 "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" > 
    
 
    
 
    
 
 
   
   
  

listusername.jsp

<%@ page language=" java "contenttype=" text/html; Charset=utf-8 "pageencoding=" UTF-8 "%> <% @taglib prefix=" C "uri=" Http://java.sun.com/jsp/jstl/core "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" > 
    
 
    
 
    
 
 
   

2. Backstage Code

Listusername.java

Package Com.gaowei.controller;import Java.util.arraylist;import Java.util.list;import Org.springframework.stereotype.controller;import Org.springframework.ui.model;import Org.springframework.web.bind.annotation.requestmapping;import Org.springframework.web.bind.annotation.requestmethod;import Org.springframework.web.bind.annotation.RequestParam; @Controllerpublic class Listusername {//no parameter @requestmapping (" /listusername ") Public String Listusername (model model) {list listuser=new ArrayList (), for (int i = 0; i <; i++) {list User.add ("username" + (i+1));} Model.addattribute ("Listusername", Listuser); return "listusername.jsp";} There is a parameter @requestmapping ("/listusername2") public string listUsername2 (@RequestParam ("username") string Username,model Model) {List listuser=new ArrayList (); for (int i = 0; i <; i++) {Listuser.add (username+ (i+1));} Model.addattribute ("Listusername", Listuser); return "listusername.jsp";}}

Login.java

Package Com.gaowei.controller;import Org.springframework.stereotype.controller;import Org.springframework.ui.model;import Org.springframework.web.bind.annotation.requestmapping;import Org.springframework.web.bind.annotation.requestmethod;import Org.springframework.web.bind.annotation.RequestParam; @Controllerpublic class Login {@RequestMapping ("/login") public string Login (@RequestParam ("username") string username) {System.out.print ("username=" +username); return " Redirect:/listusername.spring ";} @RequestMapping ("/login2") public string login2 (@RequestParam ("username") string username) {System.out.print (" Username= "+username); return" Redirect:/listusername2.spring?username= "+username;}}

3.

Redirect with no parameters

Redirected with Parameters

Third, summary.

This feature is often used in our project to have a redirect with no parameters and another parameter redirection, which makes it easier for us to use.

Rookie Learning SPRING--SPRINGMVC Annotation version control layer redirection to the control layer