在Java中，整数是带符号的，并且是大端的.单数以二进制补码格式编码.要将二进制补码转换为无符号数，只需遵循以下规则:

In Java, integer is signed and big endian. Singed number are encoded in two's complement format. To convert a two's complement number to unsigned number, just follow the following rules:

如果要使用无符号表示，只需遵循规则即可获取无符号编号.由于整数已经在big endian中，因此只需将结果分成4个字节即可.

If you want a unsigned representation, just following the rules to get the unsigned number. As the integer already in big endian, just split the result in 4 bytes.