如何避免Golang结构体嵌套格式化输出指针地址

go结构体存在嵌套结构体时，使用%+v格式化输出时会出现打印指针地址的问题，如：

type Student struct{
	Name string
	Desp string
}

type Teacher struct{
	Student []*Student
	Name string
}

func main() {
	teacher := new(Teacher)
	teacher.Name = "teacher"

	student := new(Student)
	student.Name = "student"
	student.Desp = "this is student"

	student2 := new(Student)
	student2.Name = "student2"
	student2.Desp = "this is student2"

	teacher.Student = append(teacher.Student, student)
	teacher.Student = append(teacher.Student, student2)
	result := fmt.Sprintf("%+v",*teacher)
	fmt.Print(result)
}

//输出：
//{Student:[0xc420080020 0xc420080040] Name:teacher}

如果要实现%+v格式化输出所有的内容，可以通过实现对应结构体的String()方法，如：

type Student struct{
	Name string
	Desp string
}

type Teacher struct{
	Student []*Student
	Name string
}

func (s *Student) String() string {
	return "{Name:"+s.Name+" "+"Desp:"+s.Desp+"}"
}

func main() {
	teacher := new(Teacher)
	teacher.Name = "teacher"

	student := new(Student)
	student.Name = "student"
	student.Desp = "this is student"

	student2 := new(Student)
	student2.Name = "student2"
	student2.Desp = "this is student2"

	teacher.Student = append(teacher.Student, student)
	teacher.Student = append(teacher.Student, student2)
	result := fmt.Sprintf("%+v",*teacher)
	fmt.Print(result)
}

//输出：
//{Student:[{Name:student Desp:this is student} {Name:student2 Desp:this is student2}] Name:teacher}