go json处理 encoding/json 查询和修改gjson/sjson

ops/2025/2/24 19:59:49/

标准库encoding/json

import ("encoding/json""log"
)// Student1 注意点：
// 1. 注意alain别名的写法： `json:"name1"` 而非 "json:name1"
// 2. 注意json.Marshal的时候只输出首字母大写的属性
// 3. `json:"-"` 标识这个属性忽略，不输出  用约定替代语法
type Student1 struct {Name string `json:"name1"`Age  string `json:"-"`sex  string `json:"sex1"`
}func main() {log.Println("main ...")// 将对象转换为jsons := Student1{"111", "222", "333"}data, err := json.Marshal(s)if err != nil {log.Fatalln("json marshall error", err.Error())}// {"name1":"111"}log.Println("student json :", string(data))// 将map转为jsonm := make(map[string]interface{})m["name"] = "111"m["age"] = "22"data, err = json.Marshal(m)if err != nil {log.Fatalln("json marshall error", err.Error())}log.Println("map json :", string(data))// 将json数据转为Studentjson1 := "{\"name1\":\"111\"}"var s1 Student1json.Unmarshal([]byte(json1), &s1)log.Println("student object:", s1)log.Println("success ...")
}

快速查询和修改gjson/sjson

类似java中JsonPath，可以根据路径来修改json。

import ("log""github.com/tidwall/gjson""github.com/tidwall/sjson"
)func main() {log.Println("main ...")json1 := `{"name":{"first":"www.topgoer.com","last":"dj"},"age":18}`// 获取某个属性,返回Result对象lastName := gjson.Get(json1, "name.last")log.Println("name.last:", lastName)log.Println("name.last:", lastName.String())// 获取到对象name := gjson.Get(json1, "name")// {"first":"www.topgoer.com","last":"dj"}log.Println("name:", name)log.Println("name:", name.Get("last"))// 修饰符 @pretty 打印： {//  "first": "www.topgoer.com",//  "last": "dj"//}name = gjson.Get(json1, "name|@pretty")log.Println("pretty name:", name)// 一次获取多个many := gjson.GetMany(json1, "name", "age")for i := 0; i < len(many); i++ {log.Println("many", i, many[i])}// 设置值  {"name":{"first":"www.topgoer.com","last":"dj"},"age":30}newJson, _ := sjson.Set(json1, "age", 30)log.Println("newJson:", newJson)log.Println("success ...")// 校验json格式if gjson.Valid(json1) {log.Println("is json ", gjson.Valid(json1))}// 遍历属性 {"first":"www.topgoer.com","last":"dj"}//2025/02/13 16:39:32 name > first : www.topgoer.com//2025/02/13 16:39:32 name > last : djname.ForEach(func(key, value gjson.Result) bool {log.Println("name >", key, ":", value.String())return true})// 多行json数据的变量json1 = `{"name": "Gilbert", "age": 61}{"name": "Alexa", "age": 34}{"name": "May", "age": 57}{"name": "Deloise", "age": 44}`gjson.ForEachLine(json1, func(line gjson.Result) bool {log.Println(line.String())return true})}