如何在Golang中应用建造者模式创建复杂对象_Golang 建造者模式复杂对象实践

type User struct {
    Name     string
    Email    string
    Age      int
    Address  string
    Phone    string
}

type UserBuilder struct {
    user User
}

func NewUserBuilder() *UserBuilder {
    return &UserBuilder{user: User{}}
}

func (ub *UserBuilder) SetName(name string) *UserBuilder {
    ub.user.Name = name
    return ub
}

func (ub *UserBuilder) SetEmail(email string) *UserBuilder {
    ub.user.Email = email
    return ub
}

func (ub *UserBuilder) SetAge(age int) *UserBuilder {
    ub.user.Age = age
    return ub
}

func (ub *UserBuilder) SetAddress(address string) *UserBuilder {
    ub.user.Address = address
    return ub
}

func (ub *UserBuilder) SetPhone(phone string) *UserBuilder {
    ub.user.Phone = phone
    return ub
}

func (ub *UserBuilder) Build() (*User, error) {
    if ub.user.Name == "" {
        return nil, fmt.Errorf("name is required")
    }
    if ub.user.Email == "" {
        return nil, fmt.Errorf("email is required")
    }
    // 可添加更多校验逻辑
    return &ub.user, nil
}

user, err := NewUserBuilder().
    SetName("Alice").
    SetEmail("alice@example.com").
    SetAge(25).
    SetAddress("Beijing").
    SetPhone("13800138000").
    Build()

if err != nil {
    log.Fatal(err)
}
fmt.Printf("%+v\n", user)