GO语言－struct to buf

概述golang struct to buf自留笔记 /** * Created with IntelliJ IDEA. * User: liaojie * Date: 13-7-4 * Time: 下午1:42 * To change this template use File | Settings | File Templates. */package main

golangstruct to buf自留笔记

/** * Created with IntelliJ IDEA. * User: liaojIE * Date: 13-7-4 * Time: 下午1:42 * To change this template use file | Settings | file Templates. */package mainimport (	"bytes"	"enCoding/binary"	"reflect"	"io"	"errors"	"fmt")func writeBuf(w io.Writer,v reflect.Value) (n int,err error){	newBuf := bytes.NewBuffer(nil)	for i := 0; i < v.NumFIEld(); i++ {		switch v.FIEld(i).Type().Kind() {		case reflect.Struct:			n,err := writeBuf(newBuf,v.FIEld(i))			if err != nil {				return n,err			}		case reflect.Bool:			boolByte := []byte{0}			if v.FIEld(i).Bool() {				boolByte = []byte{1}			}			newBuf.Write(boolByte)		case reflect.String:			newBuf.WriteString(v.FIEld(i).String())		case reflect.Slice:			newBuf.Write(v.FIEld(i).Bytes())		case reflect.Int:			binary.Write(newBuf,binary.littleEndian,int32(v.FIEld(i).Int()))		case reflect.Uint:			binary.Write(newBuf,uint32(v.FIEld(i).Uint()))		case reflect.Uint8,reflect.Uint16,reflect.Uint32,reflect.Uint64,reflect.Int8,reflect.Int16,reflect.Int32,reflect.Int64,reflect.float32,reflect.float64,reflect.Complex64,reflect.Complex128:			binary.Write(newBuf,v.FIEld(i).Interface())		}	}	return w.Write(newBuf.Bytes())}func WriteStructToBuffer(w io.Writer,data interface{}) ( error ) {	v := reflect.Indirect(reflect.ValueOf(data))	if v.Kind() == reflect.Struct {		fmt.Println("test")		_,err := writeBuf(w,v)		return err	}	return errors.New("invalID type Not a struct")}func StringFixedLength(s string,length int) []byte {	sLength := len(s)	if sLength >= length {		return []byte(s[:length])	} else {		b := make([]byte,length-sLength)		return append([]byte(s),b...)	}	return nil}

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