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json - 在golang中将JSON文件转换为csv

问题描述

以下代码运行成功，它将我的 json 文件转换为 csv 文件。但我想将我的每一列的标题添加到 csv 文件中。不幸的是，我不知道该怎么做。如果有人有想法，那将非常有帮助。

问候

package main

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

type People struct {
    Name string
    Craft string
}

type General struct {
    People []People
    Number int
    Message string
}

func main() {
    // Reading data from JSON File  
    response, err := http.Get("http://api.open-notify.org/astros.json")
    if err != nil {
        fmt.Printf("The Http request failed with error %s\n", err)
    }

    data,_ := ioutil.ReadAll(response.Body)
    //fmt.Println(string(data))
    // Unmarshal JSON data
    var general General
    json.Unmarshal([]byte(data), &general)
    //fmt.Printf("First person: %s, Message: %s", general.People[0].Name, general.Message)

    // Create a csv file
    csvdatafile, err := os.Create("./astros.csv")
    if err != nil {
        fmt.Println(err)
    }
    defer csvdatafile.Close()
    // Write Unmarshaled json data to CSV file
    w := csv.NewWriter(csvdatafile)
    for _, obj := range general.People {    
        fmt.Println("Are you going into the for ?")
        var record []string
        record = append(record, strconv.Itoa(general.Number), general.Message)
        record = append(record, obj.Name, obj.Craft)
        w.Write(record)
        fmt.Println("Are you coming here")
        record = nil
    }
    w.Flush()
    fmt.Println("Appending succed")

}

标签： jsoncsvgo

解决方案

好吧，如果你只想要这个例子，你可以在语句之前将列标题写入文件for，即：

w := csv.NewWriter(csvdatafile)
//new code 
var header []string
header = append(header, "Number")
header = append(header, "Message")
header = append(header, "Name")
header = append(header, "Craft")
w.Write(header)

for _, obj := range general.People {

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