package main

import (
	"encoding/json"
	"fmt"
)

type Student struct {
	ID     int
	Gender string
	Name   string
}
type Class struct {
	Title   string
	Student []*Student
}

func main() {
	c := &Class{
		Title:   "101",
		Student: make([]*Student, 0, 200),
	}
	for i := 0; i < 10; i++ {
		stu := &Student{
			ID:     i,
			Gender: "男",
			Name:   fmt.Sprintf("stu%02d", i),
		}
		c.Student = append(c.Student, stu)
	}
	//for _, v := range c.Student {
	//	fmt.Printf("%#v\n", v)
	//}
	data, err := json.Marshal(c)
	if err != nil {
		fmt.Println("json marshal failed")
		return
	}
	fmt.Printf("JSON:\n %s\n", data)

	str := `{"Title":"101","Student":[{"ID":0,"Gender":"男","Name":"stu00"},{"ID":1,"Gender":"男","Name":"stu01"}]}`
	c1 := &Class{}
	err = json.Unmarshal([]byte(str), c1)
	if err != nil {
		fmt.Println("json unmarshal failed")
		return
	}
	for _, v := range c1.Student {
		fmt.Printf("%#v\n", v)
	}
}