Spring MVC学习（一）

亦凉 2021-09-27 19:58 377阅读 0赞

新建一个web project项目，项目名字为springMvc

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70][]

导包

![2018111517180951.png][]

Controller类的实现

HelloMvc类实现了Controller接口

package cn.controller;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.springframework.web.servlet.ModelAndView;
    import org.springframework.web.servlet.mvc.Controller;
    
    public class HelloMvc implements Controller{
    
    	@Override
    	public ModelAndView handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    		ModelAndView mv=new ModelAndView();
    		mv.setViewName("Index");
    		mv.addObject("message", "Hello MVC!!!");
    		return mv;
    	}
    
    }

注意一下，如果你的类名为Controller,实现Controller接口的时候是这样的

![20181115172219420.png][]

增加Spring支持

项目-右键（我的是myeclipse2016的）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 3][]

\-------------------------------------------------------------------------------------------------------------------------------------------------------------------------

myeclipse低一点的版本

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 4][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 5][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 6][]

===============================================================================================

创建资源文件夹

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 7][]

右键资源文件夹-other

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 8][]

改一下名字，我改为applicationContext-mvc（随便都行）

![2018111517452666.png][]

选上mvc和context

![20181115174722414.png][]

![20181115175256742.png][]

代码：

<?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: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-4.2.xsd
    		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
    	
    	
    	<bean class="cn.controller.HelloMvc" name="/chy.html"></bean>
    
    	
    	<context:component-scan base-package="cn.controller"></context:component-scan>
    
    	
    	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    		
    		<property name="prefix" value="/WEB-INF/jsp/"></property>
    		<property name="suffix" value=".jsp"></property>
    	</bean>
    	
    </beans>

新建一个文件夹，用来放jsp页面（框里面两个我也不知道什么东西）

![2018111517574525.png][]

里面内容改为

![20181115175529521.png][]

修改web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    		xmlns="http://java.sun.com/xml/ns/javaee" 
    		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    		http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
    		version="3.0">
      <display-name>springMvc</display-name>
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
      
        <servlet>
      
      		<servlet-name>SV</servlet-name>
     
      		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
     
      		<init-param>
      		
      			<param-name>contextConfigLocation</param-name>
      			<param-value>classpath:applicationContext-mvc.xml</param-value>
      		</init-param>
      		
      		<load-on-startup>1</load-on-startup>
      </servlet>
      
      
      <servlet-mapping>
      	
         <servlet-name>SV</servlet-name>
        
         <url-pattern>/</url-pattern>
      </servlet-mapping>
      
    </web-app>

运行后出现

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener  
org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from ServletContext resource \[/WEB-INF/applicationContext.xml\]; nested exception is java.io.FileNotFoundException: Could not open ServletContext resource \[/WEB-INF/applicationContext.xml\]  
...

Caused by: java.io.FileNotFoundException: Could not open ServletContext resource \[/WEB-INF/applicationContext.xml\]  
...

严重: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener  
java.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh' before accessing beans via the ApplicationContext

我把这段注释掉了就行了，web.xml里面的（我也不知道什么原因）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 9][]

运行结果

![20181117214740852.png][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70]: /images/20210923/a8ecf8deced842489b7cc6c74cb27e5d.png
[2018111517180951.png]: /images/20210923/19908e81bfae411d9aba78d140daa10f.png
[20181115172219420.png]: /images/20210923/2d9fc0ded95c4be6938d54753309337c.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 1]: /images/20210923/f4a2d9087e054ed2bac90542f042e5d7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 2]: /images/20210923/8167e5dfc70b4248979c47f99f4dea9a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 3]: /images/20210923/b77a6e6d1e344b3ab425ab01309c2300.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 4]: /images/20210923/2d07ec449eef431ca3622df444ccf4c1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 5]: /images/20210923/dd5b7d4958f94918bd79f7eeb27f954b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 6]: /images/20210923/6ff6a21aa8cb4da2892a59dee32c23be.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 7]: /images/20210923/ac0039e272f543a29eab8d45bcb276f0.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 8]: /images/20210923/16b02b43e006467da3241c5643152437.png
[2018111517452666.png]: /images/20210923/529c086b81174b53b2ca1db5cc3543a3.png
[20181115174722414.png]: /images/20210923/e732d04fa935427e80d7e611a9534e43.png
[20181115175256742.png]: /images/20210923/5aa2f4f447a74ca5a4de36548e7183d3.png
[2018111517574525.png]: /images/20210923/79d361e1a01b4b88bcebb912d48802f9.png
[20181115175529521.png]: /images/20210923/fc50972a73834e89bde83db9fec736fb.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcxNzkyOA_size_16_color_FFFFFF_t_70 9]: /images/20210923/85080adbe71b4b8f9d04e8e5db936a02.png
[20181117214740852.png]: /images/20210923/53d3d4a20cf54fbaa3221dd39f816dba.png