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

IT知识RequestMappirequestmappiRequestParam

一身转战三千里，一剑曾当百万师。这篇文章主要讲述基于注解的Spring MVC（所需jar包，web.xml配置，Spring文件配置，@Controller,@RequestMapping,@RequestParam,model填參，EL取值）相关的知识，希望能为你提供帮助。
1、加入jar

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

文章图片

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="https://www.songbingjia.com/WEB-INF/jsp/"> < /property>
    < property name="suffix" value="https://www.songbingjia.com/android/.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,代码例如以下：
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  //加入注解
@RequestMapping(value = "https://www.songbingjia.com/home") // 根路径。有些类似strut2的命名空间
public class HomeController {
  /**
  * 子路径，表示仅仅支持get提交
  * @param req 能够通过传递HttpServletRequest的方式获得參数
  * @param name 表示连接的地方有：XXX?name=
  * @param u 假设url的？后面參数过多，要想获得參数。能够直接将这个參数写成User
  * @param model :定义一个Map对象，能够通过这样的方式将之传递给jsp页面
  *
  * @attention url地址能够是：http://localhost:8081/SpringMVC_02/home/hello
  *                 ?name=toto& address=haidian& age=24& tel=136XXX
  * 获得的參数为：正在运行hello方法 name:toto User: {name:toto,address:haidian,age:24,tel:136XXX}
  * @return
  */
  @RequestMapping(value="https://www.songbingjia.com/hello",method=RequestMethod.GET)
  public String hello(HttpServletRequest req,
      @RequestParam(value = "https://www.songbingjia.com/android/name")
      String name, User u, Map< String, Object> model) {
    //String name = req.getParameter("name");
    System.out.println("正在运行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的方式訪问要想訪问的地址
  * @author 涂作权
        * @date 2014-5-18
  * @note begin modify by null
  */
  @RequestMapping(value="https://www.songbingjia.com/hi") //子路径
  public String hi(){
    System.out.println("正在运行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>

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






























































































































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