SpingMvc 注解的使用

一、使用注解减小配置xml文件

二、注解能够下降耦合度

三、使用注解编写的普通类

import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; 
//说明springMvc controller 类 @Controller public class testAction { 
 //设置请求路径
 //返回值须要使用HttpServletRequest  这个有点不爽 @RequestMapping("/test") public String test(HttpServletRequest request) { request.setAttribute("test", "你妹"); return "/test"; } }

 

四、spring 配置文件简单配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.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-3.0.xsd">
    <!-- 注解扫描包 也就是指定controller 所在的包-->
    <context:component-scan base-package="com.ly.action" />



    <!-- 开启注解 -->
    <mvc:annotation-driven />


   <!-- 指明前缀和后缀 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>