使用encoding/xml包提供的函数进行XML编码和解码，并设置缩进格式

type Person struct {
    Name    string `xml:"name"`
    Age     int    `xml:"age"`
    Address string `xml:"address"`
}

func main() {
    p := &Person{
        Name:    "Alice",
        Age:     25,
        Address: "123 Main St",
    }
    
    xmlData, err := xml.MarshalIndent(p, "", "    ")
    
    if err != nil {
        fmt.Println("XML encoding error:", err)
        return
    }
    
    fmt.Println(string(xmlData))
}

<Person>
    <name>Alice</name>
    <age>25</age>
    <address>123 Main St</address>
</Person>

func main() {
    xmlData := []byte(`
        <Person>
            <name>Alice</name>
            <age>25</age>
            <address>123 Main St</address>
        </Person>
    `)
    
    var p Person
    
    err := xml.Unmarshal(xmlData, &p)
    
    if err != nil {
        fmt.Println("XML decoding error:", err)
        return
    }
    
    fmt.Println("Name:", p.Name)
    fmt.Println("Age:", p.Age)
    fmt.Println("Address:", p.Address)
}

Name: Alice
Age: 25
Address: 123 Main St