Golang原型模式对象克隆与复制示例

<font face="Courier New,Courier,monospace">type Person struct {
    Name string
    Age  int
}

func (p Person) Clone() Person {
    return p // 值拷贝即完成克隆
}

// 使用示例
original := Person{Name: "Alice", Age: 25}
copy := original.Clone()
copy.Age = 30

fmt.Println(original) // {Alice 25}
fmt.Println(copy)     // {Bob 30}</font>

<font face="Courier New,Courier,monospace">type Classroom struct {
    Name    string
    Students *[]string
}

func (c *Classroom) Clone() *Classroom {
    if c == nil {
        return nil
    }

    var studentsCopy []string
    if c.Students != nil {
        studentsCopy = make([]string, len(*c.Students))
        copy(studentsCopy, *c.Students)
    }

    return &Classroom{
        Name:     c.Name,
        Students: &studentsCopy,
    }
}

// 使用示例
students := []string{"Tom", "Jerry"}
room1 := &Classroom{Name: "Math", Students: &students}
room2 := room1.Clone()

*room2.Students = append(*room2.Students, "Bob")

fmt.Println(*room1.Students) // [Tom Jerry]
fmt.Println(*room2.Students) // [Tom Jerry Bob]</font>

<font face="Courier New,Courier,monospace">import (
    "bytes"
    "encoding/gob"
)

func DeepCopy(src, dst interface{}) error {
    var buf bytes.Buffer
    enc := gob.NewEncoder(&buf)
    dec := gob.NewDecoder(&buf)
    if err := enc.Encode(src); err != nil {
        return err
    }
    return dec.Decode(dst)
}

// 使用示例
type Data struct {
    A int
    B []string
}

d1 := Data{A: 100, B: []string{"x", "y"}}
var d2 Data
DeepCopy(&d1, &d2)

d2.B[0] = "z"

fmt.Println(d1.B) // [x y]
fmt.Println(d2.B) // [z y]</font>