SpringMVC初步——HelloWorld的实现

开通博客园好几个月了，今天开始要用博客园记录自己的学习过程！

目录：

导包：

1. 配置web.xml文件的springDispatcherServlet
　　在xml中 alt+/ 找到springdispatcherservlet即可

 <servlet>
         <servlet-name>springDispatcherServlet</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>
         <load-on-startup>1</load-on-startup>
 </servlet>

     <!-- Map all requests to the DispatcherServlet for handling -->
     <servlet-mapping>
         <servlet-name>springDispatcherServlet</servlet-name>
 <!-- url中的 / 是表示接受所有请求 -->
         <url-pattern>/</url-pattern>
 </servlet-mapping>

2.新建控制器类 HelloWorld.java

 package com.loger.controller;

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

 @Controller
 public class HelloWorld {
     @RequestMapping("/helloworld")
     public String hello(){

         System.out.println("Hello World");

         return "helloworld";
     }
 }

@RequestMapping("/helloworld")是映射路劲，返回值是jsp的文件名。在springmvc.xml中会有JSP的前缀 和 后缀 的配置！

3.新建springmvc.xml配置文件（导入aop,bean.context,mvc命名空间）

<?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:aop="http://www.springframework.org/schema/aop"
    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-2.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

    <context:component-scan base-package="com.loger.controller"></context:component-scan>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

prefix suffix分别配置JSP的前缀 和 后缀

运行结果：