Uploadify的使用（java版）
导读：uploadify是来自国外的一款优秀的基于jQuery的文件上传插件，主要功能是批量上传文件，此插件在项目中已被广泛之用，于是决定花点时间搞了一个基于Java语言的demo，特此公布出来。
二、uploadify页面初始化：
1、在页面需要展示的上传的地方加入如下代码：
上传课件：
注意：代码中的和
不可缺少，主要是用来显示浏览文件的flash'文件盒上传进度的显示。
2、初始化上传组件：
$(document).ready(function(){
$("#uploadify").uploadify({
'uploader': '/res/plugin/uploadify/uploadify.swf',
'script':"/fileserver/upload",
'cancelImg': '/res/plugin/uploadify/cancel.png',
'queueID': 'fileQueue',
'auto': true,
'buttonText': 'select',
'simUploadLimit' : 1,
'queueSizeLimit' : 1,
'fileExt': '*.jpg;*.gif;*.jpeg;*.png;*.bmp;*.zip;*.rar;*.7z',
onComplete: function(event, queueID, fileObj, response, data) {
//转换为json对象
var dataObj = eval("("+response+")");
saveFile(dataObj);
},
onSelect:function(){
},
onError: function(event, queueID, fileObj) {
alert("文件:" + fileObj.name + "上传失败");
}
});
});
三、uploadify上传处理的Java代码：
1、上传servlet代码：
这里我们使用Servlet来实现文件的上传处理，参考代码：
import com.poweree.util.DateUtils;
import net.sf.json.JSONObject;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
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* Date: 13-10-31
* Time: 下午4:31
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public class FileServlet extends HttpServlet {
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Map map = new HashMap();
request.setCharacterEncoding("utf-8");
DiskFileItemFactory factory = new DiskFileItemFactory();
String path = request.getRealPath("/file");
factory.setRepository(new File(path));
factory.setSizeThreshold(1024*1024) ;
ServletFileUpload upload = new ServletFileUpload(factory);
try {
//可以上传多个文件
Listlist = (List)upload.parseRequest(request);
for(FileItem item : list){
if(!item.isFormField()){
String name = item.getName() ;
String fileSuffix = name.substring(name.lastIndexOf(".")+1,name.length());
String oldName = name.replaceAll("." + fileSuffix,"");
String fileName = DateUtils.getNowTime(DateUtils.DATE_All_KEY_STR);
String newName = fileName + "." + fileSuffix;
OutputStream out = new FileOutputStream(new File(path,newName));
InputStream in = item.getInputStream() ;
int length = 0 ;
byte [] buf = new byte[1024] ;
while( (length = in.read(buf) ) != -1){
out.write(buf, 0, length);
}
in.close();
out.close();
/**将上传处理后的数据返回**/
map.put("fileSuffix",fileSuffix);
map.put("fileName",oldName);
map.put("filePath",fileName);
break;
}
}
}catch (Exception e) {
System.out.println("出错了：" + e.getMessage());
}
response.setContentType("text/xml; charset=UTF-8");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragma", "no-cache");
PrintWriter out = response.getWriter();
JSONObject jsonObject = JSONObject.fromObject(map);
String msg = jsonObject.toString();
out.print(msg);
out.close();
}
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req, resp);
}
}
代码中的String fileName = DateUtils.getNowTime(DateUtils.DATE_All_KEY_STR); 主要是为了生成文件的唯一名称（日期标记）
2、在web.xml配置servlet:
FileServlet
FileServlet
FileServlet
com.test.fileserver.utils.FileServlet
FileServlet
/fileserver/upload
四、截图：
uploadify的下载和详细介绍，详见：
