文件上传（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>UploadFile</servlet-name>
  	<servlet-class>cn.demo.fupload.FileUploadServlet</servlet-class>
  	<init-param>
  	<param-name>savePath</param-name>
  	<param-value>uploads</param-value>
  	</init-param>
  </servlet>
  <servlet-mapping>
  <servlet-name>UploadFile</servlet-name>
  <url-pattern>/servlet/upload</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>