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uploadify java实现多文件上传和预览

转载 作者：qq735679552 更新时间：2022-09-29 22:32:09 26 4
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这篇CFSDN的博客文章uploadify java实现多文件上传和预览由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

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 。

uploadify java实现多文件上传和预览

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 。

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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:

uploadify java实现多文件上传和预览

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我.

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