GO JSON Data parsing

This is a creation in Article, where the information may have evolved or changed.

JSON is now a very common way of data passing, and go itself integrates the generation and parsing of JSON

Introduction Package

import {  "bytes"  "encoding/json"}

Analytical

1. Define json the corresponding entity class, which is exactly the structure

   type GoAccessToken struct {  AccessToken string  ExpiresIn   int}

2. Create a reference to the struct body

   goAccessToken := &GoAccessToken{}

3. Unmarshalparse the string by going to json

   err := json.Unmarshal(str, goAccessToken)最终的 goAcessToken 为解析后的对象

If you find that the member variable in the object does not have a value, check that the first letter of the member variable is uppercase, and note that the key value of the JSON string is case-insensitive and only the first-capitalized member variable is parsed out of the value

Generate JSON

1. Define json the corresponding entity class, which is exactly the structure

   type GoAccessToken struct {  AccessToken string  ExpiresIn   int}

2. Create a reference to the struct and assign a value

   goAccessToken := &GoAccessToken{   "这是token值",   7200,}

3. By Marshal going to generate a json string

   str, err := json.Marshal(goAccessToken)str 即为生成的 json 字符串

The first letter of the member variable must be capitalized, otherwise the variable will not be generated in the JSON string