SpringMVC学习一

• 1.简单的SpringMVC
• 2.常见的三种HandlerMapping
• 3.通过springmvc来完成接受参数。
• 4.用注解替代配置信息
• Tips：插件下载

1.简单springMVC

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <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" id="WebApp_ID" version="3.0">
 3   <display-name>SpringMVC09_02display-name>
 4   <welcome-file-list>
 5     <welcome-file>index.htmlwelcome-file>
 6     <welcome-file>index.htmwelcome-file>
 7     <welcome-file>index.jspwelcome-file>
 8     <welcome-file>default.htmlwelcome-file>
 9     <welcome-file>default.htmwelcome-file>
10     <welcome-file>default.jspwelcome-file>
11   welcome-file-list>
12   <servlet>
13       <servlet-name>springMVCservlet-name>
14       <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
15       <init-param>
16           <param-name>contextConfigLocationparam-name>
17           <param-value>classpath:springMVC-servlet.xmlparam-value>
18       init-param>
19   servlet>
20   <servlet-mapping>
21       <servlet-name>springMVCservlet-name>
22       <url-pattern>*.dourl-pattern>
23   servlet-mapping>
24 web-app>

1.4Controller

 1 package com.zhiyou100.zhl.controller;
 2 
 3 import javax.servlet.http.HttpServletRequest;
 4 import javax.servlet.http.HttpServletResponse;
 5 
 6 import org.springframework.web.servlet.ModelAndView;
 7 import org.springframework.web.servlet.mvc.AbstractController;
 8 
 9 public class MyController extends AbstractController{
10 
11     @Override
12     protected ModelAndView handleRequestInternal(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
13         ModelAndView mv=new ModelAndView();
14         mv.setViewName("login");
15         mv.addObject("username", "HelloWord");
16         System.out.println("=============MyController");
17         return mv;
18     }
19 
20 }

2.常见的HandlerMapping

BeanNameUrlHandlerMapping：根据bean标签的name找到对应的Controller类

ControllerClassNameHandlerMapping:根据类的名称找到对应的类

SimpleUrlHandlerMapping:根据bean的id查找对应的Controller类

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xsi:schemaLocation="http://www.springframework.org/schema/beans
 5         http://www.springframework.org/schema/beans/spring-beans.xsd">
 6     
 7      
 8     
 9     
10     <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping">bean>
11     
12     
13     
21     
22     
23     
24     
25     
26     <bean class="com.zhiyou100.zhl.controller.MyController2">bean>
27     
28     
29     
31     
32     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
33         <property name="prefix" value="/WEB-INF/view/"/>
34         <property name="suffix" value=".jsp"/>
35     bean> 
36 
37 beans>

 3.注解替代配置信息

 3.1此部分需要额外的aop.jar包，上面的链接已经提供下载

　　接下来在SpringMVC配置文件中加入以下代码

    <context:component-scan base-package="com.zhiyou100.zhl.controller">context:component-scan>
    
    
    <mvc:annotation-driven/>

3.2创建Controller类，带有@Controller的将会被扫描到

 1 @Controller
 2 @RequestMapping("/users/")
 3 public class UsersController {
 4     
 5     @RequestMapping("list.do")
 6     public String list(String uname,String age) {
 7         System.out.println("uname:"+uname+"======"+"age:"+age);
 8         return "list";
 9     }
10     
11     @RequestMapping("list2.do")
12     public String list2(Users users) {
13         System.out.println(users);
14         return "list";
15     }
16 }

Tips.为了方便编程人员，建议装一个插件，更多方便的快捷方式与功能可以提高效率

笔者用的是Eclipse，步骤如下