Go uint64 转化成byte数组

go中将uint64 转化成byte数组

i := uint64(123456789) fmt.Println(i) b := make([]byte, 8) binary.BigEndian.PutUint64(b, i) fmt.Println(b[:]) i = uint64(binary.BigEndian.Uint64(b))

java 中读取byte数组成long

Java 默认采用高字节序

byte[] len = new byte[]{0 ,0 ,0 ,0, 7, 91, (byte)205, 21}; ByteBuffer bb = ByteBuffer.wrap(len); System.out.println(bb.getLong());