File jpgFlieI = new File(jpgold);
jpgIs = new FileInputStream(jpgFlieI);
jpgb = new byte[jpgIs.available()];
jpgIs.read(jpgb);
File jpgFileO=new File(fullurl+"mypic.jpg");
jpgFileO.createNewFile();
jpgOs = new FileOutputStream(jpgFileO);
jpgOs.write(jpgb);
jpgIs = new FileInputStream(jpgFlieI);
jpgb = new byte[jpgIs.available()];
jpgIs.read(jpgb);
File jpgFileO=new File(fullurl+"mypic.jpg");
jpgFileO.createNewFile();
jpgOs = new FileOutputStream(jpgFileO);
jpgOs.write(jpgb);
fullurl 为要拷的路径
看看这个就知道了