JAVA-SpringMVC基于注解模式第一个应用

项目文件结构

1. web.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 id="WebApp_ID" version="3.0">
 
 
  <display-name>test</display-name>
  <!-- 配置springmvc前端配置 -->
  <servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
  <param-name>contextConfigLocaltion</param-name>
  <param-value>/WEB-INF/springmvc-servlet.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
  </servlet>
  
  <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/</url-pattern>
  </servlet-mapping>
    
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

2.springmvc-servlet.xml

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc 
    http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.1.xsd">
   
   <!-- 配置注解扫描包 -->
    <context:component-scan base-package="com.luo.test"/>
  <!--注册用于支持基于朱姐的控制器的请求处理方法的beans -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/" mapping="/*.html"/>
     <!-- 配置前端页面的映射前缀和后缀 -->
     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     <!-- 配置前缀，view的路径 -->
        <property name="prefix" value="/WEB-INF/view/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

3.controller

package com.luo.test;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HelloController {
    private static final Log logger=LogFactory.getLog(HelloController.class);
    
    @RequestMapping(value="/hello")
    public String Hello(){
        logger.info("Hello Called");
        return "hello";
    }
}

4.view

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1>hello</h1>
</body>
</html>

5.运行结果

注解模式的原理：通过扫描注解文件找到Controller从而找到对应的view