好用的golang json解析工具：gjson

Get JSON values quickly - JSON Parser for Go

项目地址

https://github.com/tidwall/gjson

安装

$ go get -u github.com/tidwall/gjson

官方的性能测试

Benchmarks of GJSON alongside encoding/json, ffjson, EasyJSON, jsonparser, and json-iterator

BenchmarkGJSONGet-8                  3000000        372 ns/op          0 B/op         0 allocs/op
BenchmarkGJSONUnmarshalMap-8          900000       4154 ns/op       1920 B/op        26 allocs/op
BenchmarkJSONUnmarshalMap-8           600000       9019 ns/op       3048 B/op        69 allocs/op
BenchmarkJSONDecoder-8                300000      14120 ns/op       4224 B/op       184 allocs/op
BenchmarkFFJSONLexer-8               1500000       3111 ns/op        896 B/op         8 allocs/op
BenchmarkEasyJSONLexer-8             3000000        887 ns/op        613 B/op         6 allocs/op
BenchmarkJSONParserGet-8             3000000        499 ns/op         21 B/op         0 allocs/op
BenchmarkJSONIterator-8              3000000        812 ns/op        544 B/op         9 allocs/op

一些使用的demo

官方demo

package main

import "github.com/tidwall/gjson"

const json = `{"name":{"first":"Janet","last":"Prichard"},"age":47}`

func main() {
    value := gjson.Get(json, "name.last")
    println(value.String())
}

自己写的一个demo

package main

import (
    "fmt"
    "github.com/tidwall/gjson"
)

var j = `
{
    "code": 0,
    "msg": "success",
    "stime": "2019-04-10 21:52:51",
    "body": {
        "data": {
            "out_trade_no": "WXP20190410215250007305",
            "pay": {
                "appid": "wx822ef833b63acd132",
                "partnerid": "1525575431",
                "prepayid": "wx10215251062790766be893d11817189886",
                "package": "Sign=WXPay",
                "noncestr": "ls6k1hh2gdnyxxvi7hvs",
                "timestamp": "1554904371",
                "sign": "DFB92DF45CCA01DEF46E9BB2DB8BB630"
            }
        }
    }
}
`

func main() {
    mp := gjson.Get(j, "body.data.pay")
    fmt.Println(mp.Map())

    str := gjson.Get(j, "body.data.pay.sign")
    fmt.Println(str.String())

    fmt.Println(gjson.Get(j, "stime").String())
}

返回信息

map[appid:wx822ef833b63acd132 partnerid:1525575771 prepayid:wx10215251062790766be893d11817189886 package:Sign=WXPay noncestr:ls6k1hh2gdnyxxvi7hvs t
imestamp:1554904371 sign:DFB92DF45CCA01DEF46E9BB2DB8BB630]
DFB92DF45CCA01DEF46E9BB2DB8BB630
2019-04-10 21:52:51