A byte array and string conversion library
Introduction
update time：2017-02-23This class library can implement
1. Convert a String to a byte array
2. Convert byte array to String type data
3. Convert an int to a byte array
4. Read an Integer type data from the specified position in the byte array
5. Convert a shor string to a byte array
6. Read a Short type data from the specified position in the byte array
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