SpringMVC- Forward and redirect

SpringMVC implements forwarding and redirectionNo view resolver required

Steps: HERE I just write the code that changes.

No view resolver

  1. Create a project
  2. Add Web support to manually import lib
  3. Configure web. XML
  4. configurationspringmvc-servlet.xml

      
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <! -- Scan the specified package to validate the annotations under the specified package -->
    <context:component-scan base-package="controller"/>
    <! Let springMVC not handle static resources -->
    <mvc:default-servlet-handler/>
    <! -- Enable MVC annotation support -->
    <mvc:annotation-driven/>

</beans>

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  1. Write a business control class (there are two ways to forward and one way to redirect)
package controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/c")
public class controllerDemo {

    / / forwarding
    @RequestMapping("/t1")
    public String test1(a){
        // Method 1:
        return "/index1.jsp";
    }

    @RequestMapping("/t2")
    public String test2(a){
        2 / / way
        return "forward:/index1.jsp";
    }

    / / redirection
    @RequestMapping("/t3")
    public String test3(a){
        return "redirect:/index1.jsp"; }}Copy the code
  1. Programmed to jumpindex1.jsp (can’t put in web-INF, put in web-INF, need to change path)
<%-- Created by IntelliJ idea. User: Created by Date:2021/3/28
  Time: 16:24
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html; charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>index1.jsp</h1>
</body>
</html>

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The view resolver is used

What has changed is the controller code and the configuration of the view parser in SpringMVC-servlet.xml

The controller code:

package controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/c")
public class controllerDemo {

    // There is a view resolver
    / / forwarding
    @RequestMapping("/t4")
    public String test4(a){
        return "index1.jsp";
    }
    / / redirection
    @RequestMapping("/t5")
    public String test5(a){
        return "redirect:/index1.jsp"; }}Copy the code

Running results:

Forwarding error 404, redirection is fine, redirection will continue