枚举系统中所有已打开文件的句柄，有时一个文件删不掉，可能是文件句柄没有释放，可以用它来寻找哪个进程打开了文件，结束这个进程或者关掉句柄就可以了-Enumerate the system to handle all open files, and sometimes can not afford to delete a file, it may not release the file handle, you can use it to find which process opens a file, the end of this process or you can switch off the handle of the