java io

数据拷贝

     public static void copyFile(File sourceFile,File targetFile) throws IOException{

        BufferedInputStream inBuff=null;

        BufferedOutputStream outBuff=null;

        try{

            //缓冲输入流

            inBuff=new BufferedInputStream(new FileInputStream(sourceFile));

            //缓冲输出流

            outBuff=new BufferedOutputStream(new FileOutputStream(targetFile));

            

            byte[] b=new byte[1024*5];

            int len;

            while ((len=inBuff.read(b))!=-1) {

                outBuff.write(b,0,len);

            }

        }

        finally{

            if(inBuff!=null){

                inBuff.close();

            }

            if(outBuff!=null){

                outBuff.close();

            }

        }

    }