How to parse JSON data from HTTP response in Golang?

Parsing JSON responses in Go: Use the Unmarshal function of the encoding/json package. Create a target structure that represents JSON data. Read the HTTP response body and parse the JSON data. Print or use the parsed data.

How to parse JSON data from HTTP response in Golang

In Golang, you can use encoding/ The json package parses JSON data in HTTP responses. This package provides an Unmarshal function that decodes JSON-encoded data into a target structure.

Code example:

package main

import (
    "encoding/json"
    "fmt"
    "net/http"
    "io/ioutil"
)

func main() {
    // 创建一个 HTTP 客户端
    client := &http.Client{}

    // 发送一个 GET 请求
    resp, err := client.Get("https://example.com/api/data")
    if err != nil {
        fmt.Println(err)
        return
    }
    defer resp.Body.Close()

    // 读取响应体
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Println(err)
        return
    }

    // 创建一个目标结构
    type Data struct {
        Name string
        Age  int
    }
    var data Data

    // 解析 JSON 数据
    if err := json.Unmarshal(body, &data); err != nil {
        fmt.Println(err)
        return
    }

    // 打印解析后的数据
    fmt.Println(data)
}

Practical case:

This example is from a sample API (https:/ /example.com/api/data) and parse it into a Data structure. Then, it prints the parsed data.

You can do this by using your favorite IDE or text editor to create a new file (e.g. main.go) and paste the code above. You can then run the following commands to compile and execute the program:

go run main.go

This will output the parsed JSON data.

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