springmvc入门详解

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首先,我们先写一个入门小案例,先熟悉一下springmvc是什么,了解一下springmvc的运行流程,对加强springmvc的深层理解有很大帮助

.第一步,创建一个maven项目:

<?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_2_5.xsd"
id="MyWebApp" version="2.5">
<display-name>SpringMVC</display-name> 
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>

</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>

<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list></web-app>

package com.j1.springmvc.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 HelloController implements Controller{ @Override
public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView mv =new ModelAndView();
mv.setViewName("hellos");
mv.addObject("msg","恭喜你,小逼崽子,第一个SpringMvc程序成功了");
return mv;
}}

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>${msg}</h1>
</body>
</html>

在浏览器输入:http://localhost:8080/myspring-demo/hello.do

效果如图所示:

至此一个入门记得springmvc就写好了.

使用注解

package com.j1.springmvc.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;@RequestMapping("/hello2")
@Controller
public class Hello2Controller {@RequestMapping("/show")
public ModelAndView show(){
ModelAndView mv = new ModelAndView();
mv.setViewName("hello");
mv.addObject("msg", "呀呀呀,恭喜你,小逼崽子,我的第一个注解Controller测试成功！");
return mv;
}}

SpringMVC-servlet.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:p="http://www.springframework.org/schema/p"
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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">




<mvc:annotation-driven/>

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

<property name="prefix" value="/WEB-INF/views/"/>

<property name="suffix" value=".jsp"/>
</bean>

 
<context:component-scan base-package="com.j1.springmvc.controller"/>

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

<property name="defaultEncoding" value="UTF-8"></property>

<property name="maxUploadSize" value="5242880"></property>
</bean></beans>