uploadify java实现多文件上传和预览

2019-11-26 13:44:16

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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

<!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;  } }

效果图：