基于注解的Spring MVC（所需jar包，web.xml配置，Spring文件配置，@Controller,@RequestMapping,@RequestParam,model填参，EL取值）

1、添加jar



2、web.xml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">

 <servlet>

  <servlet-name>action</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>action</servlet-name>

  <url-pattern>/</url-pattern>

 </servlet-mapping>

 

  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

</web-app>

3、springMVC.xml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:mvc="http://www.springframework.org/schema/mvc"

 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/beans

      http://www.springframework.org/schema/beans/spring-beans.xsd

      http://www.springframework.org/schema/mvc

      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

      http://www.springframework.org/schema/context

      http://www.springframework.org/schema/context/spring-context-3.0.xsd

      http://www.springframework.org/schema/aop

      http://www.springframework.org/schema/aop/spring-aop-3.0.xsd

      http://www.springframework.org/schema/tx

      http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
">

 <!-- 注解驱动 -->

 <mvc:annotation-driven/>

 <!-- 组件扫描 -->

 <context:component-scan base-package="cn.itcast.springmvc.controller"></context:component-scan>

 

 <!-- 配置内部资源视图解析器 -->

 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

  <property name="prefix" value="/WEB-INF/jsp/"></property>

  <property name="suffix" value=".jsp"></property>

 </bean>

</beans>

4、实体bean

package cn.itcast.springmvc.domain;

public class User {

 private String name;

 private String address;

 private Integer age;

 private String tel;

 public String getName() {

  return name;

 }

 public void setName(String name) {

  System.out.println("正在通过setName方法注入name的值：" + name);

  this.name = name;

 }

 public String getAddress() {

  return address;

 }

 public void setAddress(String address) {

  this.address = address;

 }

 public Integer getAge() {

  return age;

 }

 public void setAge(Integer age) {

  this.age = age;

 }

 public String getTel() {

  return tel;

 }

 public void setTel(String tel) {

  this.tel = tel;

 }

 @Override

 public String toString() {

  return "{name:" + name + ",address:" + address + ",age:" + age

    + ",tel:" + tel + "}";

 }

}

 

5、编写HomeController,代码如下：

package cn.itcast.springmvc.controller;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import cn.itcast.springmvc.domain.User;

/**

 * @brief IAccountDao.java 学习Spring注解方式

 * @attention

 * @author 涂作权

 * @date 2014-5-18

 * @note begin modify null

 */

@Controller  //添加注解

@RequestMapping(value = "/home") // 根路径，有些类似strut2的命名空间

public class HomeController {

 /**

  * 子路径，表示只支持get提交

  * @param req 可以通过传递HttpServletRequest的方式获得参数

  * @param name 表示连接的地方有：XXX?name=

  * @param u 如果url的？后面参数过多，要想获得参数，可以直接将这个参数写成User

  * @param model :定义一个Map对象，可以通过这种方式将之传递给jsp页面

  *

  * @attention url地址可以是：http://localhost:8081/SpringMVC_02/home/hello

  *         ?name=toto&address=haidian&age=24&tel=136XXX

  * 获得的参数为：正在执行hello方法 name:toto User: {name:toto,address:haidian,age:24,tel:136XXX}

  * @return

  */

 @RequestMapping(value="/hello",method=RequestMethod.GET)

 public String hello(HttpServletRequest req,

   @RequestParam(value = "name")

   String name, User u, Map<String, Object> model) {

  //String name = req.getParameter("name");

  System.out.println("正在执行hello方法 name:" + name);

  System.out.println("User: " + u);

  //req.setAttribute("msg", "hello " + name);

  model.put("msg", "hello " + name);

  return "hello";//逻辑名

 }

 

 /**

  * \brief 定义方法hi

  *

  * @return

  * @attention url的地方通过/home/hi的方式访问要想访问的地址

  * @author 涂作权

     * @date 2014-5-18

  * @note begin modify by null

  */

 @RequestMapping(value="/hi") //子路径

 public String hi(){

  System.out.println("正在执行hi方法");

  return "hi";  //逻辑名

 }

}

6、编写的hello.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

  <head>

    <title> 'hello.jsp'</title>

  </head>

 

  <body>

    ${requestScope.msg}

  </body>

</html>