golang的json标签

 1package main
 2
 3import (
 4	"encoding/json"
 5	"fmt"
 6)
 7type T1 struct {
 8	FieldInt     int    `json:"field_int"`
 9	FieldIgnore  int    `json:"-"`                       //忽略
10	FieldBooleab bool   `json:"field_boolean,string"`    //不同类型
11	FieldString1 string `json:"field_string1,omitempty"` //忽略空值，当时复合结构时为要为指针类型
12	FieldString2 string `json:"field_string2,omitempty"`
13}
14type T2 struct {
15	T1 `json:",inline"`  //表示内嵌与T1输出一致
16}
17type T3 struct {
18	T1 `json:"t1"` //表示用t1包一层
19}
20func main() {
21	val1 := T1{
22		FieldInt:     11,
23		FieldIgnore:  11,
24		FieldBooleab: true,
25		FieldString2: "no empty",
26	}
27	bty1, _ := json.Marshal(val1)
28	fmt.Printf("%v\r\n", string(bty1))
29
30	val2 := T2{
31		val1,
32	}
33	bty2, _ := json.Marshal(val2)
34	fmt.Printf("%v\r\n", string(bty2))
35
36	val3 := T3{
37		val1,
38	}
39	bty3, _ := json.Marshal(val3)
40	fmt.Printf("%v\r\n", string(bty3))
41}
42//程序输出
43{"field_int":11,"field_boolean":"true","field_string2":"no empty"}
44{"field_int":11,"field_boolean":"true","field_string2":"no empty"}
45{"t1":{"field_int":11,"field_boolean":"true","field_string2":"no empty"}}