SpringMVC__配置视图解析以及服务端重定向和服务端跳转简单代码

Posted 2021-12-08 zhangsonglin

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
    <!-- 开启扫描 -->
    <context:component-scan base-package="com.controller"/>
    
    <!-- 开启SpringMVC注解的方式 -->
    <mvc:annotation-driven/>
    
    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 设置前后缀 -->
        <property name="prefix" value="/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

Controller

package com.controller;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
@Controller
/*@RequestMapping("/con") //这里也可以配置访问这整一个Controller路径*/
public class MyController{
    
    /**
     * 服务器端跳转/请求转发
     * url没有变化,进入视图解析器
     * @return
     */
    @RequestMapping("/indexA")
    public String indexA() {
        // TODO Auto-generated method stub
        return "index";//默认为"forward:/路径"可以不加forward
    }
    
    /**
     * 客户端重定向/页面重定向
     * 这里使用redirect:路径
     * 必须是绝对路径,进入视图解析器
     * @return
     */
    @RequestMapping("/indexB")
    public String indexB() {
        // TODO Auto-generated method stub
        return "redirect:/jsp/index.jsp";
    }
    
    /**
     * 服务器给客户端直接响应一个字符串信息
     * @return
     */
    @RequestMapping("/indexC")
    @ResponseBody//加上不进入视图解析，直接显示在页面
    public String indexC() {
        // TODO Auto-generated method stub
        return "这是在页面显示哦";
    }
    
    /**
     * 使用HttpServletRequest、HttpServletResponse
     * 进行服务端跳转
     * 这里是不进入视图解析器的
     * 路径需要使用绝对路径
     * 
     * @param req
     * @param resp
     * @throws ServletException
     * @throws IOException
     */
    @RequestMapping("/indexD")
    public void indexD(HttpServletRequest req,HttpServletResponse resp) throws ServletException, IOException {
        // TODO Auto-generated method stub
        req.getRequestDispatcher("jsp/index.jsp").forward(req, resp);
    }
    
    /**
     * 使用HttpServletRequest、HttpServletResponse
     * 进行客户端重定向
     * 这里是不进入视图解析器的
     * 路径需要使用绝对路径
     * 
     * @param req
     * @param resp
     * @throws ServletException
     * @throws IOException
     */
    @RequestMapping("/indexE")
    public void indexE(HttpServletRequest req,HttpServletResponse resp) throws ServletException, IOException {
        // TODO Auto-generated method stub
        resp.sendRedirect("jsp/index.jsp");
    }
    
    /**
     * 定义请求方式
     * 采用resful风格的POST
     * 进行服务端跳转
     * @return
     */
    @RequestMapping(value="/indexH",method=RequestMethod.POST)
    public String indexH() {
        // TODO Auto-generated method stub
        System.out.println("进入了indexH()");
        return "index";
    }

    
    
    /**
     * 定义请求方式
     * 采用resful风格的GET
     * 进行服务端跳转
     * @return
     */
    @RequestMapping(value="/indexF",method=RequestMethod.GET)
    public String indexF() {
        // TODO Auto-generated method stub
        System.out.println("进入了indeF()");
        return "index";
    }
    
    
    
    /**
     * 使用@GetMapping相当于@RequestMapping(value="/indexF",method=RequestMethod.GET)
     * 设置请求方式为GET
     * @return
     */
    @GetMapping("/indexG")
    public String indexG() {
        // TODO Auto-generated method stub
        System.out.println("进入了indexG()");
        return "index";
    }
    
    /**
     * 使用@PostMapping相当于@RequestMapping(value="/indexF",method=RequestMethod.POST)
     * 设置请求方式为POST
     * @return
     */
    @PostMapping("/indexI")
    public String indexI() {
        // TODO Auto-generated method stub
        System.out.println("进入了indexI()");
        return "index";
    }
    
    /**
     * 使用ModelAndView
     * 返回一个ModelAndView对象
     * 
     * @return
     */
    @RequestMapping("/sel")
    public ModelAndView selIndex() {
        // TODO Auto-generated method stub
        System.out.println("----返回ModelAndView----");
        ModelAndView mav = new ModelAndView();
        mav.setViewName("/index.jsp");
        return mav;
    }

    
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>SpringDemo08</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
      <servlet-name>spring-mvc</servlet-name>
      <!-- 中央处理器or前端控制器 -->
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
        <param-name>contextConfigLocation</param-name>
        <!-- 配置文件 -->
        <param-value>classpath:applicationContext.xml</param-value>
       </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring-mvc</servlet-name>
    <!-- 映射路径 -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
</web-app>