通过ByteArrayOutputStream将inputStream转变为outputStream(2)

 
                    fis=(FileInputStream)obj;   
 
                    try{   
 
                        BufferedInputStream bis=new BufferedInputStream(fis);      
 
                        baos=new ByteArrayOutputStream();       
 
                        BufferedOutputStream bos=new BufferedOutputStream(baos);     
 
                        int ch;       
 
                        int i=0;   
 
                        while((ch=bis.read())!=-1){         
 
                                bos.write(ch);     
 
                                if(i++==bufferSize){   
 
                                    bos.flush();   
 
                                    i=0;   
 
                                }   
 
                        }