原生态Spring MVC代码实战

深藏阁楼爱情的钟 2021-07-24 11:03 291阅读 0赞

**目录**

一 代码

二 运行结果

三 问题原因

四 解决方法

五 再次测试

--------------------

# 一 代码 #

1 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>springmvc</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:springmvc-servlet.xml</param-value>
            </init-param>
            
            <load-on-startup>1</load-on-startup>
        </servlet>
        
        <servlet-mapping>
            <servlet-name>springmvc</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    </web-app>

2 配置文件

<?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" id="internalResourceViewResolver">
            
            <property name="prefix" value="/WEB-INF/jsp/"/>
            
    
    
            <property name="suffix" value=".jsp"/>
        </bean>
    
    
        
        <bean id="/hello" class="com.cakin.controller.HelloController"/>
    </beans>

3 控制器

package com.cakin.controller;
    
    
    import org.springframework.web.servlet.ModelAndView;
    import org.springframework.web.servlet.mvc.Controller;
    
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    
    /**
    * @ClassName: HelloController
    * @Description: 原生控制器的实现类
    * @Date: 2020/6/10
    * @Author: cakin
    */
    public class HelloController implements Controller {
        public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
            ModelAndView mv = new ModelAndView();
            // 业务数据
            String result = "hello mvc";
            mv.addObject("msg", result);
            // 页面跳转
            mv.setViewName("test");
            return mv;
        }
    }

4 展示页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
    ${msg}
    </body>
    </html>

# 二 运行结果 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

# 三 问题原因 #

发布路径没有生成对应的jar

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

# 四 解决方法 #

1 新建lib文件夹

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 2][]

2 将依赖的jar包添加

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 3][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 4][]

# 五 再次测试 #

![2020061017031718.png][]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/14d49ba3c2e54a17b671f6c8f35f921c.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 2]: /images/20210724/68526854595e43c887464800e847e0ba.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 3]: /images/20210724/93f61fcf88964cb091885c99f8607afc.png
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[2020061017031718.png]: /images/20210724/3266c8dc2bd6420b88f71166b010956a.png