首页 > 编程 > JavaScript > 正文

Uploadify上传文件方法

2019-11-20 10:23:18
字体:
来源:转载
供稿:网友

Uploadify是JQuery的一个上传插件,实现的效果非常不错,带进度显示。不过官方提供的实例时php版本的,本文将详细介绍Uploadify在Aspnet中的使用,您也可以点击下面的链接进行演示或下载。

先给大家展示下效果图:

修改:

报找不到uploadify-cancel.png文件。找到uploadify.css,找到.uploadify-queue-item .cancel a {,修改文件的路径。
好多人都说,在chrome、Firefox上使用uploadify的时候获取不到session导致上传出错。需要手工将session id方法附加参数中。但是我这里并没有这么做,并且在chrome、Firefox上传没问题,不知道为什么,也许是因为我用的最新版的原因吧。

要点:

uploadify的js配置已经比较全面,在实际使用的时候可以适当的删减一些方法和属性。

一般情况下的单文件上传只考虑onSelect、onUploadError和onUploadSuccess即可。

如果是多文件上传,那么在单文件上传的基础上再加上对整个队列的监听onQueueComplete。

开始上传所有文件:$('#file_upload').uploadify('upload', '*');

取消上传:$('#file_upload').uploadify('cancel', parm);

parm为空:取消上传第一个文件。

parm为'*':取消所有的上传文件。

parm为file id:取消该file id对应的文件。

修改附加的一些变量:$('#file_upload').uploadify("settings","formData",{"name1":"中文name","parm1":"修改后的参数"});参数为json,如果该json中的某个变量已经有了,那么覆盖该属性,如果没有,那么追加该属性。
服务端设置编码为:upload.setHeaderEncoding("UTF-8");,这样解析的文件名称为正常中文。但是解析的附加变量中文乱码,这里做一次转码(总感觉转码比较low,不知道是哪里配置的不对)。new String(item.getString().getBytes("iso8859-1"),"utf-8")

服务端最后返回文件保存路径(这里可以随便定义返回内容)。

步骤:

配置uploadify

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%><%String path = request.getContextPath();%><%String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><base href="<%=basePath %>"><title></title><link rel="stylesheet" type="text/css" href="jquery-easyui-1.4.3/themes/default/easyui.css"><link rel="stylesheet" type="text/css" href="jquery-easyui-1.4.3/themes/icon.css"><script type="text/javascript" src="jquery-easyui-1.4.3/jquery.min.js"></script><script type="text/javascript" src="jquery-easyui-1.4.3/jquery.easyui.min.js"></script><script type="text/javascript" src="uploadify/uploadify/jquery.uploadify.min.js"></script><link rel="stylesheet" type="text/css" href="uploadify/uploadify/uploadify.css" /></head><script>$(function(){$(function() {$(function() {$('#file_upload').uploadify({'uploader' : '<%=basePath%>/UploadServlet',//服务端地址'swf' : 'uploadify/uploadify/uploadify.swf','buttonImage' : 'uploadify/uploadify/img/chooseFile.jpg',//重载按钮图片'buttonClass' : 'some-class',//重载按钮样式'height':19,//按钮宽度和高度'width':76,'queueID' : 'file_queue',//显示文件队列的一个div,在页面定义'formData' : {'parm1':'参数1','year':'2016'},//附加参数,可以在upload参数中更改'buttonText':'选择文件',//按钮显示文字,如果有图片的话,会被图片挡住'fileSizeLimit':'1MB',//文件最大'auto':false,//自动提交'fileTypeExts' : '*.gif; *.jpg; *.png',//文件类型'fileTypeDesc' : '只能上传图片',//选择文件的时候的提示信息'multi' : true,//多选'queueSizeLimit' : 3,//队列中文件的个数'onSelect' : function(file) {console.log(file);alert("选择文件:" + file.name + "/n类型="+file.type+"/n大小="+file.size);if(file.size>1024000){//文件太大,取消上传该文件alert("文件大小超过限制!");$('#file_upload').uploadify('cancel',file.id);}},'onUploadSuccess' : function(file, data, response) {alert('每个文件上传成功后触发 ' + file.name + ' was successfully uploaded with a response of ' + response + ':' + data);},'onUploadComplete' : function(file) {alert('每个文件上传完成,无论对错都触发! ' + file.name + ' finished processing.');},'onUploadError' : function(file, errorCode, errorMsg, errorString) {alert('上传出错 ' + file.name + ' could not be uploaded: ' + errorString);},'onQueueComplete':function(queueData){alert("队列中的所有文件上传完成后触发。/n"+queueData.uploadsSuccessful+'/n'+queueData.uploadsErrored)},});});});});function upload(){$('#file_upload').uploadify("settings","formData",{"name1":"中文name","parm1":"修改后的参数"});$('#file_upload').uploadify('upload', '*');//上传所有文件}function cancel(){$('#file_upload').uploadify('cancel', '*');//取消所有文件}function destroy(){alert("取消upload上传,变成原来样式!");$('#file_upload').uploadify('destroy');//destory}</script><body><div class="easyui-panel" title="说明" style="margin-bottom:15px"></div><div class="easyui-panel" style="text-align:center;margin-bottom:15px"><a href="javascript:void(0)" class="easyui-linkbutton" onclick="upload()">开始上传</a><a href="javascript:void(0)" class="easyui-linkbutton" onclick="cancel()">取消上传</a><a href="javascript:void(0)" class="easyui-linkbutton" onclick="destroy()">destroy</a><input type="file" name="file_upload" id="file_upload" /><div id="file_queue" style="width:400px;height:10px;position:absolute;z-index:999"></div></div></body></html>

服务端

package com.servlet;import java.io.File;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Iterator;import java.util.List;import java.util.UUID;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;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;/*** Servlet implementation class UploadServlet*/@WebServlet(name="UploadServlet",urlPatterns="/UploadServlet")public class UploadServlet extends HttpServlet {private static final long serialVersionUID = -6483558339095298703L;/*** @see HttpServlet#HttpServlet()*/public UploadServlet() {super();// TODO Auto-generated constructor stub}/*** @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubresponse.getWriter().append("Served at: ").append(request.getContextPath());}/*** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {System.out.println("获取session,可以根据这个session进行一些其他的判断" + request.getSession().getId());SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMdd");String remotePath = File.separator + "download" + File.separator + sdf.format(new Date()) + File.separator;String savePath = remotePath;File dfile = new File(savePath);if (!dfile.exists()) {dfile.mkdirs();}DiskFileItemFactory fac = new DiskFileItemFactory();ServletFileUpload upload = new ServletFileUpload(fac);upload.setHeaderEncoding("UTF-8");List<FileItem> 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("文件=" + name + " " + 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();}}else if(item.isFormField()){System.out.println("表单内容:" + item.getFieldName() + "=" + new String(item.getString().getBytes("iso8859-1"),"utf-8"));}}String requestPath = remotePath + name + extName;request.getSession().setAttribute(requestPath, requestPath);response.getWriter().write(savePath + name + extName);}}

发表评论 共有条评论
用户名: 密码:
验证码: 匿名发表