英文:
Unmarshal numbered XML tags in Go
问题
我尝试了很多结构体来解析这个XML，但是我无法弄清楚：
package main
import (
"bytes"
"encoding/xml"
"fmt"
)
type SettingContainer struct {
XMLName xml.Name `xml:"Settings"`
Settings []Setting `xml:",any"`
}
type Setting struct {
XMLName xml.Name `xml:",any"`
SettingRegisters []SettingRegister `xml:",any"`
}
type SettingRegister struct {
XMLName xml.Name `xml:",any"`
Value string `xml:"value,attr"`
}
func main() {
var xmlData = bytes.NewBufferString(`
<Settings>
<Setting0>
<Setting0_register value="0x20" />
<Setting0ArbitraryName value="0x0" />
</Setting0>
<Setting1>
<Setting1_register value="0x60" />
<Setting1WhateverEnable value="0x0" />
</Setting1>
<Setting2>
<Setting2_register value="0x80" />
<Setting2blahblah value="0x1" />
</Setting2>
<Setting4>
<Setting4_register value="0x2fffff8" />
<Setting4ThisCanBeAnything value="0x0" />
</Setting4>
</Settings>`)
var s []SettingContainer
xml.Unmarshal(xmlData.Bytes(), &s)
for _, i := range s {
fmt.Println(i)
}
}
我无法打印任何内容。我实际需要的字段是SettingN_register的value属性以及SettingN标签的名称。我该如何正确地将XML解析到这些字段中？我正在研究创建一个自定义的解析函数，但是我无法找到正确的方法。我只能获取到"Settings"标签的名称。
英文:
I've tried quite a lot of structs to try and unmarshal this XML, but I couldn't really figure it out:
package main
import (
"bytes"
"encoding/xml"
"fmt"
)
type SettingContainer struct {
XMLName xml.Name `xml:"Settings"`
Settings []Setting `xml:",any"`
}
type Setting struct {
XMLName xml.Name `xml:",any"`
SettingRegisters []SettingRegister `xml:",any"`
}
type SettingRegister struct {
XMLName xml.Name `xml:",any"`
Value string `xml:"value,attr"`
}
func main() {
var xmlData = bytes.NewBufferString(`
<Settings>
<Setting0>
<Setting0_register value="0x20" />
<Setting0ArbitraryName value="0x0" />
</Setting0>
<Setting1>
<Setting1_register value="0x60" />
<Setting1WhateverEnable value="0x0" />
</Setting1>
<Setting2>
<Setting2_register value="0x80" />
<Setting2blahblah value="0x1" />
</Setting2>
<Setting4>
<Setting4_register value="0x2fffff8" />
<Setting4ThisCanBeAnything value="0x0" />
</Setting4>
</Settings>`)
var s []SettingContainer
xml.Unmarshal(xmlData.Bytes(), &s)
for _, i := range s {
fmt.Println(i)
}
}
I just can't get it to print anything. The fields I actually need are the value attr of the SettingN_register as well as the SettingN tag names. How can I make it so the xml is unmarshalled into these fields properly? I was looking into making a custom unmarshal function, but I couldn't really find how to make one properly. All I was able to get from this XML was the "Settings" tag name.
答案1
得分: 2
将XMLName字段中的xml:",any"标签移除（这会导致解码器尝试将额外的子元素映射到该字段），并将其解组为SettingContainer而不是[]SettingContainer，因为XML文档只能有一个根元素。工作示例在这里：https://go.dev/play/p/dItnmEGH8oM
type SettingContainer struct {
XMLName xml.Name `xml:"Settings"`
Settings []Setting `xml:",any"`
}
type Setting struct {
XMLName xml.Name
SettingRegisters []SettingRegister `xml:",any"`
}
type SettingRegister struct {
XMLName xml.Name
Value string `xml:"value,attr"`
}
func main() {
var xmlData = bytes.NewBufferString(`...`)
var s SettingContainer
xml.Unmarshal(xmlData.Bytes(), &s)
fmt.Println(s)
}
英文:
Remove the xml:",any" tags from the XMLName fields (this is causing the decoder to try to map the extra child elements to this field), and unmarshal into a SettingContainer instead of []SettingContainer as an XML document can only have one root element. Working example here: https://go.dev/play/p/dItnmEGH8oM
type SettingContainer struct {
XMLName xml.Name `xml:"Settings"`
Settings []Setting `xml:",any"`
}
type Setting struct {
XMLName xml.Name
SettingRegisters []SettingRegister `xml:",any"`
}
type SettingRegister struct {
XMLName xml.Name
Value string `xml:"value,attr"`
}
func main() {
var xmlData = bytes.NewBufferString(`...`)
var s SettingContainer
xml.Unmarshal(xmlData.Bytes(), &s)
fmt.Println(s)
}
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论