Golang结构体格式化输出问题

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}