public static void copy(String c_url,String p_url){
try {
fis = new FileInputStream(c_url);
bis = new BufferedInputStream(fis);
fos = new FileOutputStream(p_url);
bos = new BufferedOutputStream(fos);
int b = 0;
while((b=bis.read())>0){
bos.write(b);
bos.flush();
}
System.out.println("copy success!");