JQuery Uploadify 基于JSP的无刷新上传实例

转载自

http://www.cnblogs.com/cjt-java/archive/2012/09/01/2666696.html

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：

JQuery Uploadify 基于JSP的无刷新上传实例

3、点击开始上传（上传完就自动消失）

JQuery Uploadify 基于JSP的无刷新上传实例

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：

JQuery Uploadify 基于JSP的无刷新上传实例

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>


<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>


<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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原文地址：https://www.cnblogs.com/luyesql/p/2769696.html