DWR的安装使用和与spring的整合
1.安装配置
1.1拷贝dwr文件包到lib目录下
1.2编辑web.xml文件，加入如下代码：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!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=UTF-8"><title>Insert title here</title><script type="text/javascript" src="<%=request.getContextPath()%>/dwr/engine.js"></script><script type="text/javascript" src="<%=request.getContextPath()%>/dwr/util.js"></script><script type="text/javascript" src="<%=request.getContextPath()%>/dwr/interface/MyDwr.js"></script><script type="text/javascript">function upload() {var file = dwr.util.getValue("myfile");alert(file.value);alert(file);MyDwr.upload(file,file.value,function(data){alert(data);});}</script></head><body><input type="file" id="myfile"/><input type="button" value="上传文件" onclick="upload()"/></body></html>