Go by Example ไธญๆ–‡็‰ˆ: XML

Go ้€š่ฟ‡ encoding.xml ๅŒ…ไธบ XML ๅ’Œ ็ฑป-XML ๆ ผๅผๆไพ›ไบ†ๅ†…ๅปบๆ”ฏๆŒใ€‚

 
package main

import (
    "encoding/xml"
    "fmt"
)

Plant ็ป“ๆž„ๅฐ†่ขซๆ˜ ๅฐ„ๅˆฐ XML ใ€‚ ไธŽ JSON ็คบไพ‹็ฑปไผผ๏ผŒๅญ—ๆฎตๆ ‡็ญพๅŒ…ๅซ็”จไบŽ็ผ–็ ๅ™จๅ’Œ่งฃ็ ๅ™จ็š„ๆŒ‡ไปคใ€‚ ่ฟ™้‡Œๆˆ‘ไปฌไฝฟ็”จไบ† XML ๅŒ…็š„ไธ€ไบ›็‰นๆ€ง๏ผš XMLName ๅญ—ๆฎตๅ็งฐ่ง„ๅฎšไบ†่ฏฅ็ป“ๆž„็š„ XML ๅ…ƒ็ด ๅ็งฐ๏ผ› id,attrr ่กจ็คบ Id ๅญ—ๆฎตๆ˜ฏไธ€ไธช XML ๅฑžๆ€ง๏ผŒ่€Œไธๆ˜ฏๅตŒๅฅ—ๅ…ƒ็ด ใ€‚

 
type Plant struct {
    XMLName xml.Name `xml:"plant"`
    Id      int      `xml:"id,attr"`
    Name    string   `xml:"name"`
    Origin  []string `xml:"origin"`
}

func (p Plant) String() string {
    return fmt.Sprintf("Plant id=%v, name=%v, origin=%v",
        p.Id, p.Name, p.Origin)
}

func main() {
    coffee := &Plant{Id: 27, Name: "Coffee"}
    coffee.Origin = []string{"Ethiopia", "Brazil"}

ไผ ๅ…ฅๆˆ‘ไปฌๅฃฐๆ˜Žไบ† XML ็š„ Plant ็ฑปๅž‹ใ€‚ ไฝฟ็”จ MarshalIndent ็”Ÿๆˆๅฏ่ฏปๆ€งๆ›ดๅฅฝ็š„่พ“ๅ‡บ็ป“ๆžœใ€‚

 
    out, _ := xml.MarshalIndent(coffee, " ", "  ")
    fmt.Println(string(out))

ๆ˜Ž็กฎ็š„ไธบ่พ“ๅ‡บ็ป“ๆžœๆทปๅŠ ไธ€ไธช้€š็”จ็š„ XML ๅคด้ƒจไฟกๆฏใ€‚

 
    fmt.Println(xml.Header + string(out))

ไฝฟ็”จ Unmarshal ๅฐ† XML ๆ ผๅผๅญ—่Š‚ๆต่งฃๆžๅˆฐ Plant ็ป“ๆž„ใ€‚ ๅฆ‚ๆžœ XML ๆ ผๅผ้”™่ฏฏๆˆ–ๆ— ๆณ•ๆ˜ ๅฐ„ๅˆฐ Plant ็ป“ๆž„๏ผŒๅฐ†่ฟ”ๅ›žไธ€ไธชๆ่ฟฐๆ€ง้”™่ฏฏใ€‚

 
    var p Plant
    if err := xml.Unmarshal(out, &p); err != nil {
        panic(err)
    }
    fmt.Println(p)

    tomato := &Plant{Id: 81, Name: "Tomato"}
    tomato.Origin = []string{"Mexico", "California"}

parent>child>plant ๅญ—ๆฎตๆ ‡็ญพๅ‘Š่ฏ‰็ผ–็ ๅ™จ๏ผŒๅฐ† Plants ไธญ็š„ๅ…ƒ็ด ๅตŒๅฅ—ๅœจ <parent><child> ้‡Œ้ขใ€‚

 
    type Nesting struct {
        XMLName xml.Name `xml:"nesting"`
        Plants  []*Plant `xml:"parent>child>plant"`
    }

    nesting := &Nesting{}
    nesting.Plants = []*Plant{coffee, tomato}

    out, _ = xml.MarshalIndent(nesting, " ", "  ")
    fmt.Println(string(out))
}

$ go run xml.go
 <plant id="27">
   <name>Coffee</name>
   <origin>Ethiopia</origin>
   <origin>Brazil</origin>
 </plant>
<?xml version="1.0" encoding="UTF-8"?>
 <plant id="27">
   <name>Coffee</name>
   <origin>Ethiopia</origin>
   <origin>Brazil</origin>
 </plant>
Plant id=27, name=Coffee, origin=[Ethiopia Brazil]
 <nesting>
   <parent>
     <child>
       <plant id="27">
         <name>Coffee</name>
         <origin>Ethiopia</origin>
         <origin>Brazil</origin>
       </plant>
       <plant id="81">
         <name>Tomato</name>
         <origin>Mexico</origin>
         <origin>California</origin>
       </plant>
     </child>
   </parent>
 </nesting>

ไธ‹ไธ€ไธชไพ‹ๅญ: ๆ—ถ้—ด

@mmcgrana ๅ’ŒEli Bendersky็ผ–ๅ†™ | gobyexample-cn ็ฟป่ฏ‘ | ๅ้ฆˆ | ๆบ็  | license