上传文件的内容会多一些字符串，怎么去调？？？（高手请进）

Question

关键语句
 int s;
       byte[] bt=new byte[4096];       while((s=m_request.getInputStream().readLine(bt,0,bt.length))!=-1)
       {       
           out.write(bt,0,s);     
       }
       out.flush();
       out.close();
怎么回多呢？上传文件的格式是这样的啊？怎么去除这些东东啊？

Answer 1

package com.centralsoft.gs.files;import java.io.*;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
public class file_upload {  public file_upload() {
  }
  public void upload(HttpServletRequest m_request) throws Exception{
     byte[] b=new byte[4096];
     int i;
    String filename="";
    boolean condition=true;
     while(((i=m_request.getInputStream().readLine(b,0,b.length))!=-1) && condition)
     {
       String maybename=new String(b,0,b.length);     
       int j=maybename.indexOf("filename=");
       if(j>0)
       {
         String name=maybename.substring(j);
         filename= name.substring(name.lastIndexOf("\\")+1).trim();        
         condition=false;//得到文件名
       }
     }    
     if(!filename.equals(""))
     {
       System.out.println(filename.substring(0,filename.length()-1));
       File f=new File("c:\\upload\\",filename.substring(0,filename.length()-1));
       System.out.println("file ok!"+f.getAbsolutePath());
       FileOutputStream out=new FileOutputStream(f);
       System.out.println("out!");
       int s;
       byte[] bt=new byte[4096];
       while((s=m_request.getInputStream().readLine(bt,0,bt.length))!=-1)
       {       
           out.write(bt,0,s);     
       }
       out.flush();
       out.close();
     }
  }
}

Answer 2

我都是从m_request中获得的啊！怎么可能是我的变量呢？？