先分析一下上传文件的流程
1-先通过前段页面中的选择文件选择要上传的图片
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8" contentType="text/html; charset=UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="content-type" content="text/html;charset=utf-8"> <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"> <script type="text/javascript" src="js/jquery.min.js"></script> <script type="text/javascript" src="js/common.js"></script> <script type="text/javascript" src="js/ajaxfileupload.js"></script> </head> <body> <input type="file" value="上传" name="inputImage" id="inputImage"> <input type="button" value="上传" id="upload"> <a id="downLoad">下载</a> </body> </html>