Golang IntToByte 实现

package test01 import ( "bytes" "encoding/binary" "fmt" "os" ) func IntToByte(num int64) []byte { var buffer bytes.Buffer err := binary.Write(&buffer, binary.BigEndian, num) CheckErr(err) return buffer.Bytes() } func CheckErr(err error) { if err != nil { fmt.Println("err occur: ", err) os.Exit(1) } } // Write writes the binary representation of data into w. // Data must be a fixed-size value or a slice of fixed-size // values, or a pointer to such data. // Bytes written to w are encoded using the specified byte order // and read from successive fields of the data. // When writing structs, zero values are written for fields // with blank (_) field names. func Write(w io.Writer, order ByteOrder, data interface{}) error {}