Spring MVC 入门示例

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为了简单，将spring-framework中dist下的所有jar包拷贝到项目的WEB-INF/lib目录下

需要添加Apache commons logging日志，此处使用的是commons.logging

web.xml中添加如下配置：

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list><session-config><session-timeout>30</session-timeout></session-config><filter><filter-name>CharacterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param><init-param><param-name>forceEncoding</param-name><param-value>true</param-value></init-param></filter><filter-mapping><filter-name>CharacterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><servlet><servlet-name>dispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/spring/*.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping></web-app>

以上配置已经增加了由spring提供的编码过滤器来解决乱码问题

编写MVC控制配置文件mvc-config.xml，该文件在WEB-INF的spring文件下，而web.xml中已经配置加载该文件夹下的所有xml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"xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"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.xsd"><!-- prefix和suffix：查找视图页面的前缀和后缀（前缀[逻辑视图名]后缀）比如传进来的逻辑视图名为hello，则该该jsp视图页面应该存放在“WEB-INF/jsp/hello.jsp” --><beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/jsp/" /><property name="suffix" value=".jsp" /></bean><bean name="/hello.do" class="test.HelloWorldController" /></beans>

编写控制的类，该类接受参数，设置该参数为视图数据

package test;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.Controller;// http://localhost:8080/spring/hello.do?user=javapublic class HelloWorldController implements Controller{public ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response) {ModelAndView mv = new ModelAndView();// 添加模型数据 可以是任意的POJO对象mv.addObject("user", request.getParameter("user"));// 设置逻辑视图名，视图解析器会根据该名字解析到具体的视图页面mv.setViewName("hello");return mv;}}

视图使用JSP，页面很简单。在WebRoot下新建文件夹jsp，新建jsp命名为hello.jsp。

<%@ page language="java" pageEncoding="UTF-8"%><html><head><title>SpringMVC</title></head><body>您好，${user }!</body></html>

访问路径http://localhost:8080/spring/hello.do?user=java看效果

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