spring boot in action 1

重新认识spring

基于servlet 的web开发

首先我们会定义

如果开发一个简单的 hello world web应用

• 一个项目结构

• 一个web.xml 文件 或者WebApplicationInitializer实现.

  <?xml version="1.0"encoding="UTF-8"?>
  <web-app id="WebApp_ID" version="2.4"xmlns="http://java.sun.com/xml/ns/j2ee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/j2eehttp://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  	<listener>
  		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  	</listener>
  	<context-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>/WEB-INF/applicationContext.xml,/WEB-INF/controllers.xml,/WEB-INF/service.xml</param-value>
  	</context-param>
  	<servlet>
  		<servlet-name>dispatch</servlet>
  		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  		<init-param>
  			<param-name>contextConfigLocation</param-name>
  			<param-value>/WEB-INF/applicationContext.xml</param-value>
  		</init-param>
  	</servlet>
  	<servlet-mapping>
  		<servlet-name>dispatch</servlet-name>
  		<servlet-pattern>*.*</servlet-pattern>
  	</servlet-mapping>
  </web-app>