不是太清楚，这是guid各个部分比较完整的解释： time_low unsigned long 0-3 The low field of the timestamp. time_mid unsigned short 4-5 The middle field of the timestamp. time_hi_and_version unsigned short 6-7 The high field of the timestamp multiplexed with the version number. clock_seq_hi_and_reserved unsigned small 8 The high field of the clock sequence multiplexed with the variant. clock_seq_low unsigned small 9 The low field of the clock sequence. node character 10-15 The spatially unique node identifier. 按照这个说法guid的10-15个字节应该就是网卡的mac地址，但实际上这个几个位数是会变化，难道我们得出的guid是通过再一层换算的？
['{8496D10B-E1B6-4CED-80F4-B0C2B34C1FA4}']
['{43A7AC69-CAFE-488B-A20E-9DD5734845E7}']当然不是了,我连着生成三个,如果是那就应该一样了
有部分取自 网卡的mac地址 計算而已, 還有當前時間!
time_low unsigned long 0-3 The low field of the timestamp.
time_mid unsigned short 4-5 The middle field of the timestamp.
time_hi_and_version unsigned short 6-7 The high field of the timestamp multiplexed with the version number.
clock_seq_hi_and_reserved unsigned small 8 The high field of the clock sequence multiplexed with the variant.
clock_seq_low unsigned small 9 The low field of the clock sequence.
node character 10-15 The spatially unique node identifier.
按照这个说法guid的10-15个字节应该就是网卡的mac地址，但实际上这个几个位数是会变化，难道我们得出的guid是通过再一层换算的？