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JQuery Uploadify 基于JSP的无刷新上传实例

2012-02-19 14:24 453 查看

项目需要实现一个无刷新批量文件上传功能，仔细研究了下，发现JQuery 提供的Uploadify插件十分不错，不过官方的实例是基于php的，下面我用jsp+servlet简单实现了这个功能，废话少说，先看效果图：

1、初始化页面：

2、选择多个文件（可一次多选）后：

3、点击开始上传（上传完就自动消失）

效果就是上面那样，页面不刷新。下面上代码：

1、首先先到官网下载最新的zip压缩包http://www.uploadify.com

2、项目结构：

3、关键代码：

index.jsp

<%@ page language="java" contentType="text/html; charset=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>Upload</title>

<!--装载文件-->
<link href="css/default.css" rel="stylesheet" type="text/css" />
<link href="css/uploadify.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="scripts/jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="scripts/swfobject.js"></script>
<script type="text/javascript" src="scripts/jquery.uploadify.v2.1.4.min.js"></script>

<!--ready事件-->
<script type="text/javascript">
$(document).ready(function() {
$("#uploadify").uploadify({
'uploader' : 'scripts/uploadify.swf',
'script' : 'servlet/Upload',//后台处理的请求
'cancelImg' : 'images/cancel.png',
'folder' : 'uploads',//您想将文件保存到的路径
'queueID' : 'fileQueue',//与下面的id对应
'queueSizeLimit' : 5,
'fileDesc' : 'rar文件或zip文件',
'fileExt' : '*.rar;*.zip', //控制可上传文件的扩展名，启用本项时需同时声明fileDesc
'auto' : false,
'multi' : true,
'simUploadLimit' : 2,
'buttonText' : 'BROWSE'
});
});
</script>
</head>

<body>
<div id="fileQueue"></div>
<input type="file" name="uploadify" id="uploadify" />
<p>
<a href="javascript:jQuery('#uploadify').uploadifyUpload()">开始上传</a> 
<a 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>com.xzit.upload.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>

Upload.java

package com.xzit.upload;

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);

}

}

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标签： jquery jsp stylesheet string file javascript

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