golang 类型转换

import (
    "bytes"
    "encoding/binary"         
    "encoding/gob"
    "fmt"
)

func str_to_byte(src string) []byte {
    //strSlice := []string{src}    
    buffer := &bytes.Buffer{}
    gob.NewEncoder(buffer).Encode(src)
    return buffer.Bytes()
}

func uint64_to_byte(src uint64) []byte {
    buf := make([]byte, 8)
    binary.BigEndian.PutUint64(buf, src)
    return buf
}

func main() {
    var u uint64
    u = 128
    bytes := uint64_to_byte(u)
    fmt.Println(bytes)
    str := "128"
    bytes = str_to_byte(str)
    fmt.Println(bytes)
}