编程实现帧封装。帧封装只是在数据的头和尾上加特定的二进制数据，可以直接用读写二进制文件的方式读出来，然后把该加的头尾写进去就行了。

-Programming frame package. Encapsulated only in the data frame the head and tail add a specific binary data, you can read and write binary files directly read out the way and then the beginning and end of the added inclusion of opinions on line.