SpringMVC学习之基于注解的控制器

spring可以通过@Controller注解自动发现你的控制器类以及@RequestMapping注解中的请求映射，这样就免去了在Bean配置文件中配置它们的麻烦。

这里写了一个简单例子：

springmvc配置文件如下：

<?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">            <!-- 扫描注解的驱动 -->        <mvc:annotation-driven />        <!-- 设置扫描包 -->        <context:component-scan base-package="com.springmvc.controllers" />        <!-- 视图解析器 -->        <bean id="jspViewResolver"                class="org.springframework.web.servlet.view.InternalResourceViewResolver">                <!-- 前缀 -->                <property name="prefix" value="/WEB-INF/jsp/" />                <!-- 后缀 -->                <property name="suffix" value=".jsp" />        </bean></beans>

下面时Controller控制器的代码：

package com.springmvc.controllers;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;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;import com.springmvc.pojo.User;@Controller@RequestMapping("/annotation/") //设置请求路径public class AnnotationController {        //url=====>>>>>/annotation/index 执行该方法        @RequestMapping("index")        public ModelAndView index(HttpServletRequest request,HttpServletResponse response) {                System.out.println("**********annotation——index***********");                return new ModelAndView("index");        }        //url=====>>>>>/annotation/multi 执行该方法        @RequestMapping(value="multi",method=RequestMethod.POST)        public String multi(HttpServletRequest request) {                System.out.println("**********annotation——multi***********");                String name = request.getParameter("name");                int age = Integer.parseInt(request.getParameter("age"));                User user = new User();                user.setName(name);                user.setAge(age);                System.out.println(user);                request.setAttribute("user", user);                return "annotation";  //返回视图名称        }}

前端annotation.jsp页面：

表单：

提交表单后的jsp页面：

<h1>Hello annotation!</h1><h1>user:${user.name }</h1><h1>age:${user.age }</h1>

提交表单后的执行的效果：