`

JSP中Uploadify插件的使用（jQuery上传插件）

uploadifyjquery 
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1、下载最新的zip压缩包 http://www.uploadify.com

2、从其中提取文件。
   下载插件安装包后，可以看到官方给出的例子。里面文件夹的几个主要文件：jquery.uploadify.js(完成上传功能的脚本文件，在调用页面引用)、uploadify.css(外观样式表)、uploader.swf(上传控件的主体文件，flash控件)、upload.php(服务器端处理文件，官方仅提供了php版的)。
下面我使用的是在MyEclipse部署的java版。注意：需要加入三个commons.jar包：io、logging、fileupload。

3、导入default.css,uploadify.css，jQuery脚本，swfobject脚本和Uploadify插件。并且添加调用插件使用$，在您的网页的<head>部分ready事件： 

<%@ 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-1.3.2.min.js"></script>
        <script type="text/javascript" src="scripts/swfobject.js"></script>
        <script type="text/javascript" src="scripts/jquery.uploadify.v2.1.0.min.js"></script>
   <!--ready事件-->
<script type="text/javascript">
        $(document).ready(function() {
            $("#uploadify").uploadify({
                'uploader'       : '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'  :1,
                '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>&nbsp;
        <a href="javascript:jQuery('#uploadify').uploadifyClearQueue()">取消所有上传</a>
        </p>
    </body>
</html>

4、后台处理的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);
    }
}

5、配置处理的servlet
Web.xml文件 
   <?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>


到这里就ok了哦。

转自：http://tangsong1005.blog.163.com/blog/static/168966094201091544518156/
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