jquery中的ajax异步上传

找了好久终于在网上找到了ajax异步上传文件的方法，不过网上大多数是php的 ，我改为struts2写的 大同小异，希望对学习java的人有一定的帮助。我上传的是音乐文件。

ajaxfileupload.js这个js文件是主要文件，一定要导入。

 jsp页面 ，其中我还做了div的隐藏*****************************

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+
":"+request.getServerPort()+path+"/";
%>



　
　

#div1{
color: #000000; font-size: 12px; 
  border: 0px solid #74B3DC;
  color: #000;
  background: #fff;
display:none;
}

　
   
   
   


   
 

action上传后台代码*************************************

package action;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.json.annotations.JSON;
import org.farng.mp3.MP3File;
import org.farng.mp3.TagException;
import org.farng.mp3.id3.AbstractID3v2;
import org.farng.mp3.id3.ID3v1;
import org.farng.mp3.lyrics3.AbstractLyrics3;
import com.base.baseAction;
import com.opensymphony.xwork2.ActionSupport;
public class Upload extends baseAction {
private static final long serialVersionUID = -4848248679889814408L;
private String fileName;
private File upload;
public File getUpload() {
  return upload;
}
public void setUpload(File upload) {
  this.upload = upload;
}
public void setUploadFileName(String fileName) {
  this.fileName = fileName;
}

public void uploadAction() throws IOException {
  System.out.println("进入了该方法！");
    String targetDirectory = "D:\upload";
    System.out.println(upload);
    File target = new File(targetDirectory, fileName);
    FileUtils.copyFile(upload, target);
    String path = targetDirectory+"\"+fileName;
     try { 
 MP3File file = new MP3File(path);//1,lyrics 
 AbstractID3v2 id3v2 = file.getID3v2Tag(); 
 ID3v1 id3v1 = file.getID3v1Tag(); 
 String ss = "";
 if (id3v2 != null) { 
   System.out.println("id3v2"); 
     ss = id3v2.getAlbumTitle()+";"+id3v2.getSongTitle()+";"+id3v2.getLeadArtist();
     //String str = "{'msg','"+ss+"'}";
     String str = ss;
     outPut(str);
   System.out.println(id3v2.getAlbumTitle());//专辑名 
   System.out.println(id3v2.getSongTitle());//歌曲名 
   System.out.println(id3v2.getLeadArtist());//歌手 
 } else { 
   System.out.println("id3v1"); 
   System.out.println(id3v1.getAlbumTitle()); 
   System.out.println(id3v1.getSongTitle()); 
   System.out.println(id3v1.getLeadArtist()); 
 } 
 AbstractLyrics3 lrc3Tag = file.getLyrics3Tag(); 
 if (lrc3Tag != null) { 
   String lyrics = lrc3Tag.getSongLyric(); 
   System.out.println(lyrics); 
 } 
      } catch (IOException e) { 
 e.printStackTrace(); 
      } catch (TagException e) { 
 e.printStackTrace(); 
      } 
      System.out.println("over"); 
 }
}

struts.xml配置文件*********************************

  
    //设置上传文件最大量
    
  
  
     
/index.jsp
      
     
  

  后来经过调试，发现火狐和ie不兼容 导致无执行争取结果，所以我上传ajaxfileupload.js 我修改了源码

以上是本文给大家介绍jquery中的ajax异步上传，希望对大家有所帮助。