/
xml.go
102 lines (92 loc) · 2.3 KB
/
xml.go
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package encode
import (
// "fmt"
"github.com/beevik/etree"
"github.com/pkg/errors"
"reflect"
"sort"
"strconv"
)
var (
ErrNoContent = errors.New("内容为空")
)
// EncodeXML 导出xml的配置文件
func EncodeXML(v interface{}) ([]byte, error) {
doc := etree.NewDocument()
doc.CreateProcInst("xml", `version="1.0" encoding="utf-8"`)
root := doc.CreateElement("root")
switch value := v.(type) {
case []interface{}:
if len(value) == 0 {
return nil, ErrNoContent
}
for _, elem := range value {
child, err := encodeXMLElement(elem)
if err != nil {
return nil, err
}
root.AddChild(child)
}
case map[string]interface{}:
child, err := encodeMap(value)
if err != nil {
return nil, err
}
root.AddChild(child)
default:
return nil, errors.Errorf("EncodeXML不支持的类型:%s:%v\n", reflect.TypeOf(value).Kind(), value)
}
doc.Indent(4)
return doc.WriteToBytes()
}
func encodeXMLElement(value interface{}) (*etree.Element, error) {
switch realV := value.(type) {
case map[string]interface{}:
return encodeMap(realV)
default:
return nil, errors.Errorf("encodeXMLElement不支持的类型:%s:%v\n", reflect.TypeOf(realV).Kind(), realV)
}
}
func encodeMap(v map[string]interface{}) (*etree.Element, error) {
elem := etree.NewElement("i")
// keys := reflect.ValueOf(v).MapKeys()
var err error
SortedMapIterate(v, func(k string, value interface{}) {
str, err2 := interfaceToString(value)
if err2 != nil {
err = err2
return
}
elem.CreateAttr(k, str)
})
if err != nil {
return nil, err
}
// for i := 0; i < len(keys); i++ {
// key := keys[i].Interface().(string)
// value := v[key]
// }
return elem, nil
}
func interfaceToString(v interface{}) (string, error) {
switch value := v.(type) {
case string:
return value, nil
case int64:
return strconv.FormatInt(value, 10), nil
case float64:
return strconv.FormatFloat(value, 'f', 4, 64), nil
default:
return "", errors.Errorf("不支持的类型:%s:%v\n", reflect.TypeOf(value).Kind(), value)
}
}
func SortedMapIterate(m map[string]interface{}, f func(string, interface{})) {
var keys []string
for k := range m {
keys = append(keys, k)
}
sort.Strings(keys)
for _, k := range keys {
f(k, m[k])
}
}