HTTP接受文件的java实现

package TOOLS;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;

public  class HTTPPostAcceptPhoto {
    
    Map<String,String> result = new HashMap<String,String>();
    
    public Map<String,String> analyze(HttpServletRequest request,
            HttpServletResponse response,String imageurl) {
        if (ServletFileUpload.isMultipartContent(request)) {// 判断是否含有文件
            insertPIC(request,imageurl);
        } else {
            txthandle(request, response);
        }
        return result;
    }
    //写出图片
    private void insertPIC(HttpServletRequest request,String url) {

        ServletFileUpload upload = new ServletFileUpload();
        FileItemIterator iter;
        try {
            iter = upload.getItemIterator(request);
            while (iter.hasNext()) {
                FileItemStream item = iter.next();
                String name = item.getFieldName();// filename
                InputStream stream = item.openStream();
                System.out.println("文本" + item.isFormField());
                if (item.isFormField()) {// 如果是文本
                    txt(result,name, Streams.asString(stream,"utf-8"));
                } else {
                    String dir = request.getSession().getServletContext()
                            .getRealPath(url);
                    OutputStream fileos = null;
                    byte[] buff = new byte[1];
                    File image =new File(dir, item.getName());
                    System.out.println(" item.getName():"+ item.getName());
                    fileos = new BufferedOutputStream(new FileOutputStream(
                            image));

                    while ((stream.read(buff)) != -1) {
                        fileos.write(buff);
                    }
                    fileos.flush();
                    fileos.close();
                    result.put("imagename", item.getName());//返回图片名字
                }
            }
        } catch (FileUploadException e) {
            // TODO Auto-generated catch block
            System.out.println(e);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            System.out.println(e);
        }
    }
    //有文本时的操作
    private  void txt(Map<String,String> result,String name, String asString){
        result.put(name, asString);
    }
    //纯文本操作
    public  void txthandle(HttpServletRequest request,
            HttpServletResponse response){
        result = request.getParameterMap();
    }
    
}