二.初次使用SpringMVC

2021-03-29 18:26

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1.Spring大杂烩

别忘了，对于MVC中的所有bean,我们都要将其放到Spring的IOC容器当中去。

2.SpringMVC的作用

技术图片

3.简单使用

首先配置web.xml

xml version="1.0" encoding="UTF-8"?>
web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

servlet>
    servlet-name>spring-mvcservlet-name>
    servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    init-param>
        param-name>contextConfigLocationparam-name>
        param-value>classpath:spring-mvc.xmlparam-value>
    init-param>

    load-on-startup>1load-on-startup>
servlet>
    
    
  servlet-mapping>
      servlet-name>spring-mvcservlet-name>
      url-pattern>/url-pattern>
  servlet-mapping>
web-app>

接着配置spring-mvc.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

    bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>

     bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

         property name="prefix" value="/WEB-INF/jsp/"/>
         property name="suffix" value=".jsp"/>
     bean>

beans>

接着开始测试，使用最简单，最纯朴的原生方式，继承Controller层的接口实现对应的方法。

package com.why.Controller;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @program: SpringMVC
 * @description:
 * @author: @why
 * @create: 2020-09-01 22:35
 **/
public class TestController implements Controller {
    @Override
    public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        ModelAndView view = new ModelAndView();
        //相当于setAttribute
        view.addObject("test","why");
        //跳转到指定页面
        view.setViewName("jump");
        return  view;
    }
}