uploadify java实现多文件上传和预览

本文实例为大家分享了java文件上传和预览实现代码，供大家参考，具体内容如下

1、下载uploadify插件

2、index.html

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									<!DOCTYPE html> 

									<html lang="en"> 

									<head> 

									<@head/> 

									<script src="<@path/>/js/uploadify-v3.1/jquery.uploadify-3.1.js"></script> 

									<link href="<@path/>/js/uploadify-v3.1/uploadify.css" rel="stylesheet" type="text/css" /> 

									<style type="text/css"> 

									#uploader { 

									 position: relative; 

									} 

									#uploader_queue { 

									 position: absolute; 

									 width: 600px; 

									 left: 200px; 

									 top: 0; 

									} 

									</style> 

									<script type="text/javascript"> 

									 $(function() { 

									  $("#file_upload") 

									    .uploadify( 

									      { 

									       'auto' : false, 

									       'method' : "get", 

									       'formData' : { 

									        'folder' : 'file' 

									       }, 

									       'height' : 30, 

									       'swf' : '<@path/>/js/uploadify-v3.1/uploadify.swf', // flash 

									       'uploader' : '<@path/>/uploadAttach.do', // 

									       'width' : 120, 

									       'fileTypeDesc' : 'ֻ支持多种文件格式', 

									       'fileTypeExts' : '.dat;.264;.h264;.mp4;.dav;.MP4;.AVI;.ts;.avi;' 

									         + '.mpg;.rmvb;.flv;.rm;.mov;.wmv;.JPG;.bmp;.png;.BMP;.jpg;.PNG;' 

									         + '.gif;.xlsx;.xls;.txt;.pdf;.doc;.docx;.rar;.zip;.7z', 

									       'fileSizeLimit' : '800KB', 

									       'buttonText' : '选择文件', 

									       'uploadLimit' : 5, 

									       'successTimeout' : 5, 

									       'requeueErrors' : false, 

									       'removeTimeout' : 10, 

									       'removeCompleted' : false, 

									       'queueSizeLimit' : 10, 

									       'queueID' : 'uploader_queue', 

									       'progressData' : 'speed', 

									       'onInit' : function() { 

									       }, 

									       'onUploadSuccess' : function(file, data, response) { 

									        $("#uploader_view").append( 

									          '<img height="60" alt="" src="<@path/>/upload/' 

									            + encodeURI(data) 

									            + '"/><br/><br/>'); 

									       }, 

									       'onQueueComplete' : function(queueData) { 

									        $('#uploader_msg').html( 

									          queueData.uploadsSuccessful 

									            + '个文件上传成功<br/>'); 

									       } 

									      }); 

									 }); 

									</script> 

									</head> 

									<body class=""> 

									 <@header/> 

									 <br /> 

									 <br /> 

									 <br /> 

									 <br /> 

									 <div id="uploader"> 

									  <p> 

									   <input type="file" name="file_upload" id="file_upload" /> 

									  </p> 

									  <a href="javascript:$('#file_upload').uploadify('upload','*')">上传</a> 

									  <a href="javascript:$('#file_upload').uploadify('stop')">取消上传</a> 

									  <div id="uploader_queue"></div> 

									  <div id="uploader_msg"></div> 

									  <div id="uploader_view"></div> 

									 </div> 

									 <br /> 

									 <br /> 

									 <br /> 

									 <br /> <@footer/> 

									</body> 

									</html>

3、java文件

				?

									package com.frame.core.ctrl; 

									import java.io.File; 

									import java.io.FileNotFoundException; 

									import java.io.FileOutputStream; 

									import java.io.IOException; 

									import java.io.PrintWriter; 

									import java.util.Date; 

									import java.util.Map; 

									import java.util.UUID; 

									import javax.servlet.ServletException; 

									import javax.servlet.http.HttpServletRequest; 

									import javax.servlet.http.HttpServletResponse; 

									import org.apache.log4j.Logger; 

									import org.springframework.stereotype.Controller; 

									import org.springframework.ui.ModelMap; 

									import org.springframework.web.bind.annotation.RequestMapping; 

									import org.springframework.web.multipart.MultipartFile; 

									import org.springframework.web.multipart.MultipartHttpServletRequest; 

									import org.springframework.web.servlet.ModelAndView; 

									@Controller

									public class loginCtrl { 

									 private static Logger log = Logger.getLogger(loginCtrl.class); 

									 @RequestMapping(value = "/goindex") 

									 public ModelAndView goindex() { 

									  ModelAndView mav = new ModelAndView("index"); 

									  mav.addObject("name", "笑傲江湖"); 

									  mav.addObject("projectName", "Freemarker框架"); 

									  return mav; 

									 } 

									 @RequestMapping(value = "/login") 

									 public void login(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { 

									  request.getSession().setAttribute("username", "身份认证成功"); 

									  request.getRequestDispatcher("/index.jsp").forward(request, response); 

									 } 

									 @RequestMapping("/uploadAttach") 

									 public void processUploadDir(ModelMap modelMap, 

									   MultipartHttpServletRequest request, PrintWriter writer) throws Exception { 

									  Map<String, MultipartFile> fileMap = request.getFileMap(); 

									  String path = request.getSession().getServletContext().getRealPath("/");; 

									  System.out.println("path:"+path); 

									  Date currentTime = new Date(); 

									  long prefix = currentTime.getTime(); 

									  StringBuffer attachIds = new StringBuffer(); 

									  for (Map.Entry<String, MultipartFile> f : fileMap.entrySet()) { 

									   MultipartFile file = f.getValue(); 

									   if (!isLegalFile(file)) { 

									    String msg = "is a illegal file"; 

									    throw new RuntimeException(msg); 

									   } 

									   String originalFileName = prefix + "_" + file.getOriginalFilename(); 

									   File fileDir = new File(path + "/upload" + File.separator); 

									   if (!fileDir.exists()) { 

									    fileDir.mkdirs(); 

									   } 

									   File files = new File(path + "/upload" + File.separator 

									     + originalFileName); 

									   FileOutputStream fileOutputStream = null; 

									   try { 

									    fileOutputStream = new FileOutputStream(files); 

									    fileOutputStream.write(file.getBytes()); 

									    fileOutputStream.flush(); 

									    attachIds.append(originalFileName + ","); 

									   } catch (FileNotFoundException e) { 

									    e.printStackTrace(); 

									   } catch (IOException e) { 

									    e.printStackTrace(); 

									   } catch (Exception e) { 

									    e.printStackTrace(); 

									   } finally { 

									    if (fileOutputStream != null) { 

									     try { 

									      fileOutputStream.close(); 

									     } catch (IOException e) { 

									      e.printStackTrace(); 

									     } 

									    } 

									   } 

									  } 

									  writer.write(attachIds.toString().substring(0,attachIds.toString().length()-1)); 

									 } 

									 private final String[] fileType = new String[]{".dat",".264",".h264",".mp4",".dav",".MP4",".AVI",".ts",".avi",".mpg",".rmvb",".flv",".rm",".mov",".wmv", 

									   ".JPG",".bmp",".png",".BMP",".jpg",".PNG",".gif", 

									   ".xlsx",".xls",".txt",".pdf",".doc",".docx", 

									   ".rar",".zip",".7z"}; 

									 private boolean isLegalFile(MultipartFile file) { 

									  String originalFileName = file.getOriginalFilename(); 

									  for(String ft : fileType) { 

									   if (originalFileName.endsWith(ft)) { 

									    return true; 

									   } 

									  } 

									  return false; 

									 } 

									}