golang实现java uuid的序列化方法

目前只实现了java生成的固定的uuid：85bb94b8-fd4b-4e1c-8f49-3cedd49d8f28的序列化

package main

import (
 "encoding/binary"
 "encoding/json"
 "fmt"
 "log"
 "os"
 "strings"
 "time"

"github.com/Shopify/sarama"
 "github.com/google/uuid"
)

const (
 DATE_TIME_PATTERN = ""
 STREAM_MAGIC   = 0xaced
 STREAM_VERSION  = 5
 TC_STRING     = 0x74
 TC_OBJECT     = 0x73
 TC_CLASSDESC   = 0x72
 SC_SERIALIZABLE  = 0x02
 TC_ENDBLOCKDATA  = 0x78
 TC_NULL      = 0x70
)

func main() {
 uuidTest()
}

func uuidTest() {
 f, _ := os.Create("uuid-go.out")
 defer f.Close()

f.Write(ShortBytes(STREAM_MAGIC))
 f.Write(ShortBytes(STREAM_VERSION))
 f.Write([]byte{TC_OBJECT})
 f.Write([]byte{TC_CLASSDESC})

className := "java.util.UUID"
 classNameLen := len(className)

f.Write(ShortBytes(uint16(classNameLen)))
 f.Write([]byte(className))

sid := -4856846361193249489

f.Write(LongBytes(uint64(sid)))

//flags
 f.Write([]byte{2})

//fields length
 f.Write(ShortBytes(2))

//field type code
 f.Write([]byte{'J'})

f1 := "leastSigBits"
 f1Len := len(f1)

f.Write(ShortBytes(uint16(f1Len)))
 f.Write([]byte(f1))

//filed type code
 f.Write([]byte{'J'})

f2 := "mostSigBits"
 f2Len := len(f2)

f.Write(ShortBytes(uint16(f2Len)))
 f.Write([]byte(f2))

f.Write([]byte{TC_ENDBLOCKDATA})
 f.Write([]byte{TC_NULL})

leastSigBits := -8121893460813967576

f.Write(LongBytes(uint64(leastSigBits)))

mostSigBits := -8810284723775779300

f.Write(LongBytes(uint64(mostSigBits)))

}

func ShortBytes(i uint16) []byte {
 bytes := make([]byte, 2)

binary.BigEndian.PutUint16(bytes, i)

return bytes
}

func LongBytes(i uint64) []byte {
 bytes := make([]byte, 8)

binary.BigEndian.PutUint64(bytes, i)

return bytes
}

func BigEndian() { // 大端序
 // 二进制形式：0000 0000 0000 0000 0001 0002 0003 0004
 var testInt int32 = 0x01020304 // 十六进制表示
 fmt.Printf("％d use big endian: \n", testInt)

var testBytes []byte = make([]byte, 4)
 binary.BigEndian.PutUint32(testBytes, uint32(testInt)) //大端序模式
 fmt.Println("int32 to bytes:", testBytes)

convInt := binary.BigEndian.Uint32(testBytes) //大端序模式的字节转为int32
 fmt.Printf("bytes to int32: ％d\n\n", convInt)
}

func LittleEndian() { // 小端序
 //二进制形式： 0000 0000 0000 0000 0001 0002 0003 0004
 var testInt int32 = 0x01020304 // 16进制
 fmt.Printf("％d use little endian: \n", testInt)

var testBytes []byte = make([]byte, 4)
 binary.LittleEndian.PutUint32(testBytes, uint32(testInt)) //小端序模式
 fmt.Println("int32 to bytes:", testBytes)

convInt := binary.LittleEndian.Uint32(testBytes) //小端序模式的字节转换
 fmt.Printf("bytes to int32: ％d\n\n", convInt)
}

func Int64ToBytes(i int64) []byte {
 var buf = make([]byte, 8)
 binary.BigEndian.PutUint64(buf, uint64(i))
 return buf
}

java读取测试

public class Test {

public static void main(String[] args) throws IOException, ClassNotFoundException {
   readUUIDTest();
 }

private static void readUUIDTest() throws IOException, ClassNotFoundException {
   try (var fis = new FileInputStream("uuid-go.out"); var is = new ObjectInputStream(fis)) {
     var uuid = is.readObject();

System.out.print(uuid);

}
 }
}

来源：https://www.jianshu.com/p/ebf9fe8d234d