Springmvc之注解基本使用

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看示例：

1、web.xml

<?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">  <display-name></display-name>    <servlet>  <servlet-name>test</servlet-name>  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath*:config/spring-servlet.xml</param-value></init-param><load-on-startup>1</load-on-startup>  </servlet>    <servlet-mapping>  <servlet-name>test</servlet-name>  <url-pattern>/</url-pattern>  </servlet-mapping>    <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list></web-app>

2、spring-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:mvc="http://www.springframework.org/schema/mvc"       xmlns:p="http://www.springframework.org/schema/p"       xmlns:context="http://www.springframework.org/schema/context"       xmlns:aop="http://www.springframework.org/schema/aop"       xmlns:tx="http://www.springframework.org/schema/tx"       xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">    <!--        使Spring支持自动检测组件，如注解的Controller    -->  <context:component-scan base-package="cn.com.yy.controller"/>    <!-- 开启注解配置 -->   <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>   <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>      <!-- 支持JSP JSTL的解析器 -->    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">    <property name="prefix" value="/WEB-INF/page/"/>    <property name="suffix" value=".jsp"/>     </bean></beans>

对于此配置文件，当使用注解时，可以使用

<mvc:annotation-driven/>

代替

   <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>   <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>

这两行代码。

3、Controller

package cn.com.yy.controller;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.servlet.ModelAndView;@Controllerpublic class UserController {@RequestMapping(value="/addUser",method=RequestMethod.GET)public ModelAndView addUser(){String msg = "this is a add user page";return new ModelAndView("add","msg",msg);}@RequestMapping("/removeUser")public ModelAndView removeUser(){String msg = "this is a remove user page";return new ModelAndView("remove","msg",msg);}}

4、页面

add.jsp

  <body>   ${msg }  </body>

5、效果

上述就是SpringMVC之简单的注解使用。

另外，Controller中可以按照如下方式进行编写：

@RequestMapping("/removeUser2")public String removeUser2(HttpServletRequest request){String msg = "this is a remove user page2";request.setAttribute("msg", msg);return "remove";}

参数返回String，同时传递参数到页面。

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