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package main
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/**
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Tag是结构体的元信息，可以在运行的时候通过反射的机制读取出来。 Tag在结构体字段的后方定义，由一对反引号包裹起来，具体的格式如下：
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`key1:"value1" key2:"value2"`
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*/
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import (
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"encoding/json"
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"fmt"
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)
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// Student2 学生
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type Student2 struct {
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ID int `json:"id"` //通过指定tag实现json序列化该字段时的key
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Gender string //json序列化是默认使用字段名作为key
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name string //私有不能被json包访问
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}
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func main() {
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s1 := Student2{
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ID: 1,
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Gender: "男",
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name: "沙河娜扎",
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}
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data, err := json.Marshal(s1)
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if err != nil {
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fmt.Println("json marshal failed!")
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return
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}
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fmt.Printf("json str:%s\n", data) //json str:{"id":1,"Gender":"男"}
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}
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