springMVC简单例子

spring MVC是显示层的mvc框架，和struts可以比较；和spring、hibernate没有比较性。

一 、开发流程

1）引jar包

//spring_core
spring3.2.9core\commons-logging-1.2.jar
spring3.2.9core\spring-beans-3.2.9.RELEASE.jar
spring3.2.9core\spring-context-3.2.9.RELEASE.jar
spring3.2.9core\spring-core-3.2.9.RELEASE.jar
spring3.2.9core\spring-expression-3.2.9.RELEASE.jar

//spring mvc
springMVC\spring-web-3.2.9.RELEASE.jar
springMVC\spring-webmvc-3.2.9.RELEASE.jar

2)web.xml配置spring mvc中核心ervlet:DispatcherServlet

<servlet>
      <servlet-name>DispatcherServlet</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc.xml</param-value>
      </init-param>
  </servlet>
  <servlet-mapping>
      <servlet-name>DispatcherServlet</servlet-name>
      <url-pattern>*.action</url-pattern>
  </servlet-mapping>

3)编写处理Action类

public class HelloAction implements Controller{

    @Override
    public ModelAndView handleRequest(HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        ModelAndView modelAndView = new ModelAndView();

        modelAndView.addObject("word", "nice");
        modelAndView.setViewName("/jsp/index.jsp");

        return modelAndView;
    }

}

4）在servlet配置文件中进行url和类的映射配置

<?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/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

        <bean name="/hello.action" class="com.huitong.action.HelloAction"></bean>

</beans>

注意：如果之前的配置不正确，则spring会去/WEB-INF/<servlet-name>-servlet.xml查找配置文件。

最后测试，在浏览器中输入地址进行测试。