spring 3.0 mvc 基于注解笔记2

最新推荐文章于 2025-01-29 21:18:54 发布

原创最新推荐文章于 2025-01-29 21:18:54 发布 · 294 阅读

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#MVC #Spring #JSP #XML #Web

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spring3 的基于注释的mvc可以简化我们的xml配置
1.配置web.xml


<?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">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
    <servlet>
  	<servlet-name>mvc</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>/WEB-INF/classes/spring/*.xml</param-value>
  	</init-param>
  	<load-on-startup>1</load-on-startup>
  </servlet>刘冬明(yjtuuje@hotmail.com);
  <servlet-mapping>
  	<servlet-name>mvc</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>
</web-app>

2.编写Spring配置文件config.xml


<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	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">
	<context:component-scan base-package="mvc"></context:component-scan>
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/page/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>

</beans>

配置定义文件和之前略有不同
<context:component-scan base-package="mvc"></context:component-scan>
定义了启动时需要检查的注释信息的包路径
3.包含注释的Controller类


package mvc;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
//定义该类是作为Controller进行处理
@Controller
public class HelloWorld {
	//定义访问路径hello.do 请求方法类型
	@RequestMapping(value="hello",method=RequestMethod.GET)
	public String helloWorld(){
		System.out.println("HelloWorld!");
		return "hello";
	}
}

4.简单的显示页面 /WEB-INF/page/hello.jsp


<html>
  <head>
    <base href="<%=basePath%>">

    <title>My JSP 'hello.jsp' starting page</title>

	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>

  <body>
    HelloWorld<br>
  </body>
</html>