简单flex文件上传--java端

用到的第三方包：commons-fileupload-1.2.jar 可到apache官方网站下载
package fileupload;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import java.util.ListIterator;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.xml.sax.helpers.AttributesImpl;


public class UploadHandler extends HttpServlet {

private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println("*****************doget");
//super.doPost(req, resp);
}


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

        PrintWriter out = null;
        
       System.out.println("********************post method uploadDirectory:"+uploadPath);

      
        File disk = null;
        FileItem item = null;
        DiskFileItemFactory factory = new DiskFileItemFactory();                                  
       process the request.
        String statusMessage = "";
        String fileName = "";
      
        ListIterator iterator = null;
        List items = null;
        ServletFileUpload upload = new ServletFileUpload( factory );

        try {
            out = response.getWriter();
  
          
            items = upload.parseRequest(request);
            iterator = items.listIterator();
          
          
            while( iterator.hasNext() )                                                                       {
          
                         
              item = (FileItem)iterator.next();

              if( item.isFormField() )
              {

                if (item.getFieldName().equalsIgnoreCase("othername")){
                fileName = item.getString();                                                                  }
                                    
              } else {
                   
                      
                        disk = new File(uploadPath + fileName);                                              item.write(disk);                                                                                 System.out.println("***************upload sucess:"+uploadPath + fileName);

                                           }
                 
                
                  
                               }      
          
out.write("ok")；
            out.close();                                                                  
        }
        catch (Exception e){
        e.printStackTrace();
            out.println(e.getMessage());
        }
   
}  


public void init() throws ServletException {   

//     tempPath = ....   
    // 文件夹不存在就自动创建：   
    if(!new File(uploadPath).isDirectory())   
        new File(uploadPath).mkdirs();   
  
}  

private String uploadPath = "d:\\tmp\\"; // 上传文件的目录  


}