golang动态解析xml

package main

import (
	"encoding/xml"
	"fmt"
	"mahonia"
	"os"
	"strconv"
	"text/template"
)

type Attribute struct {
	Name  string
	Value string
}

type Token struct {
	Name       string
	Attributes []Attribute
	Tokens     []Token
}

type Result struct {
	Root Token
}

var result = Result{}

func main() {

	if !parse("config.xml") {
		return
	}

	if !output("code_h.tpl", "code.h") {
		return
	}

	if !output("code_cpp.tpl", "code.cpp") {
		return
	}

	fmt.Println("OK")
}

func parse_token(decoder *xml.Decoder, tt xml.Token, mytoken *Token) {

	token := tt.(xml.StartElement)
	name := token.Name.Local
	mytoken.Name = name

	for _, attr := range token.Attr {
		attrName := attr.Name.Local
		attrValue := attr.Value

		attr := Attribute{Name: attrName, Value: attrValue}

		mytoken.Attributes = append(mytoken.Attributes, attr)
	}

	var t xml.Token
	var err error

	for t, err = decoder.Token(); err == nil; t, err = decoder.Token() {

		switch t.(type) {
		// 处理元素开始（标签）
		case xml.StartElement:

			mytoken.Tokens = append(mytoken.Tokens, Token{})

			parse_token(decoder, t, &mytoken.Tokens[len(mytoken.Tokens)-1])

			// 处理元素结束（标签）
		case xml.EndElement:
			return
		case xml.CharData:
		default:
			return
		}
	}
}

func parse(filename string) bool {
	file, err := os.Open(filename)
	if err != nil {
		fmt.Println(err)
		return false
	}

	var t xml.Token

	decoder := xml.NewDecoder(file)
	t, decerr := decoder.Token()
	if decerr != nil {
		fmt.Println(decerr)
		return false
	}
	parse_token(decoder, t, &result.Root)
	fmt.Println("result", result.Root)
	return true
}

func genlist(n string) []string {
	num, _ := strconv.Atoi(n)
	ret := make([]string, num)
	for i := 0; i < num; i++ {
		ret[i] = strconv.Itoa(i)
	}
	return ret
}

func iconv(str string) string {
	enc := mahonia.NewEncoder("gb2312")
	return enc.ConvertString(str)
}

func output(src string, des string) bool {

	file, err := os.Create(des)
	if err != nil {
		fmt.Println(err)
		return false
	}

	t := template.New("text")
	if err != nil {
		fmt.Println(err)
		return false
	}

	t = t.Funcs(template.FuncMap{"genlist": genlist, "iconv": iconv})

	srcfile, err := os.Open(src)
	if err != nil {
		fmt.Println(err)
		return false
	}

	var buffer [1024 * 1024]byte
	n, rerr := srcfile.Read(buffer[0:])
	if rerr != nil {
		fmt.Println(rerr)
		return false
	}

	t, err = t.Parse(string(buffer[0:n]))
	if err != nil {
		fmt.Println(err)
		return false
	}

	err = t.Execute(file, result.Root)
	if err != nil {
		fmt.Println(err)
		return false
	}

	return true
}

有疑问加站长微信联系（非本文作者）