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基于jquery uploadify的文件上传

2012-04-13 17:24 465 查看
commons-fileupload-1.2.1.jar

commons-io-1.3.2.jar

注意：工程中需要引入commons-fileupload的包。



upload.java

package servlet;

import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.UUID;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

@SuppressWarnings("serial")
public class Upload extends HttpServlet {
@SuppressWarnings("unchecked")
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String savePath = this.getServletConfig().getServletContext()
.getRealPath("");
savePath = savePath + "/uploads/";
File f1 = new File(savePath);
System.out.println(savePath);
if (!f1.exists()) {
f1.mkdirs();
}
DiskFileItemFactory fac = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(fac);
upload.setHeaderEncoding("utf-8");
List fileList = null;
try {
fileList = upload.parseRequest(request);
} catch (FileUploadException ex) {
return;
}
Iterator<FileItem> it = fileList.iterator();
String name = "";
String extName = "";
while (it.hasNext()) {
FileItem item = it.next();
if (!item.isFormField()) {
name = item.getName();
long size = item.getSize();
String type = item.getContentType();
System.out.println(size + " " + type);
if (name == null || name.trim().equals("")) {
continue;
}
//扩展名格式：
if (name.lastIndexOf(".") >= 0) {
extName = name.substring(name.lastIndexOf("."));
}
File file = null;
do {
//生成文件名：
name = UUID.randomUUID().toString();
file = new File(savePath + name + extName);
} while (file.exists());
File saveFile = new File(savePath + name + extName);
try {
item.write(saveFile);
} catch (Exception e) {
e.printStackTrace();
}
}
}
response.getWriter().print(name + extName);
}
}


index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>Uploadify</title>
<link href="css/default.css" mce_href="css/default.css" rel="stylesheet" type="text/css" />
<link href="css/uploadify.css" mce_href="css/uploadify.css" rel="stylesheet" type="text/css" />
<mce:script type="text/javascript" src="js/jquery-1.3.2.min.js" mce_src="js/jquery-1.3.2.min.js"></mce:script>
<mce:script type="text/javascript" src="js/swfobject.js" mce_src="js/swfobject.js"></mce:script>
<mce:script type="text/javascript" src="js/jquery.uploadify.v2.0.1.js" mce_src="js/jquery.uploadify.v2.0.1.js"></mce:script>
<mce:script type="text/javascript"><!--
$(document).ready(function() {
$("#uploadify").uploadify({
'uploader'       : 'uploadify.swf',
'script'         : 'servlet/Upload',
'cancelImg'      : 'images/cancel.png',
'folder'         : 'uploads',
'queueID'        : 'fileQueue',
'auto'           : false,
'multi'          : true,
'simUploadLimit' : 2,
'buttonText'     : 'BROWSE'
});
});

// --></mce:script>
</head>
<body>
<div id="fileQueue"></div>
<input type="file" name="uploadify" id="uploadify" />
<p>
<a href="javascript:jQuery('#uploadify').uploadifyUpload()" mce_href="javascript:jQuery('#uploadify').uploadifyUpload()">开始上传</a>
<a href="javascript:jQuery('#uploadify').uploadifyClearQueue()" mce_href="javascript:jQuery('#uploadify').uploadifyClearQueue()">取消所有上传</a>
</p>
</body>
</html>


web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app 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/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <servlet>
<servlet-name>Upload</servlet-name>
<servlet-class>servlet.Upload</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Upload</servlet-name>
<url-pattern>/servlet/Upload</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
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