将HTML表单输入编组为JSON并写入文件，golang

<form action="/submit" method="post">
  <label for="name">姓名:</label>
  <input type="text" id="name" name="name"><br><br>
  <label for="age">年龄:</label>
  <input type="text" id="age" name="age"><br><br>
  <input type="submit" value="提交">
</form>

package main

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

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {
    http.HandleFunc("/submit", submitHandler)
    http.ListenAndServe(":8080", nil)
}

func submitHandler(w http.ResponseWriter, r *http.Request) {
    if r.Method == "POST" {
        // 解析表单数据
        r.ParseForm()

        // 创建Person对象并填充数据
        person := Person{
            Name: r.Form.Get("name"),
            Age:  r.Form.Get("age"),
        }

        // 将Person对象转换为JSON
        jsonData, err := json.Marshal(person)
        if err != nil {
            http.Error(w, err.Error(), http.StatusInternalServerError)
            return
        }

        // 将JSON数据写入文件
        err = ioutil.WriteFile("data.json", jsonData, 0644)
        if err != nil {
            http.Error(w, err.Error(), http.StatusInternalServerError)
            return
        }

        // 返回成功消息
        w.Write([]byte("数据已成功写入文件"))
    } else {
        http.Error(w, "只支持POST请求", http.StatusMethodNotAllowed)
    }
}