英文:
read arrays from a JSON file to your GO variables
问题
我被指派将我的项目从Python转换为Go，但我已经在这个问题上困惑了几个小时。
我有一个名为data.json的文件，其中包含以下数据：
{
"mobiles":["iPhone 13 Pro","OnePlus 10 Pro","Google Pixel 6"],
"laptops":["Dell XSP 13","Acer Chromebook Spin","Lenovo ThinkPad x1"],
"cars":["Suzuki Crossover","Golf GTI","Hyundai Tucson","Hyundai Kona"]
}
对于我的项目，我想将data.json中的数据加载到以下切片中：
mobiles := []{从json中获取的数据}
laptops := []{从json中获取的数据}
cars := []{从json中获取的数据}
我在考虑使用切片，如果我没错的话，这样做是否允许我根据需要向我的json文件中的数组添加更多数据？
jsonFile, err := os.Open("data/data.json")
if err != nil {
fmt.Println(err)
}
fmt.Println(jsonFile)
fmt.Println("Successfully Opened data.json")
这给我输出：
&{0xc000062180}
Successfully Opened data.json
我试图使用以下方式获取我需要的数据：
fmt.Println(jsonFile["cars"])
我需要学习指针吗？还是我完全走错了方向？
英文:
I have been tasked with converting my project from Python to Go, but I've been stumped for hours on this.
I have this file data.json which contains the following data
{
"mobiles":["iPhone 13 Pro","OnePlus 10 Pro","Google Pixel 6"],
"laptops":["Dell XSP 13","Acer Chromebook Spin","Lenovo ThinkPad x1"],
"cars":["Suzuki Crossover","Golf GTI","Hyundai Tucson","Hyundai Kona"]
}
For my project, I would like to load the data from data.json into the following slices
mobiles := []{ data from json }
laptops := []{ data from json }
cars := []{ data from json }
I'm thinking of using slices, if I'm not wrong would that allow me to add more data to my arrays in the json file as I need?
jsonFile, err := os.Open("data/data.json")
if err != nil {
fmt.Println(err)
}
fmt.Println(jsonFile)
fmt.Println("Successfully Opened data.json")
This gives me:
&{0xc000062180}
Successfully Opened data.json
I was trying to target the data I need with for example:
fmt.Println(jsonFile["cars"])
Do I need to learn about pointers or am I completly barking up the wrong tree?
答案1
得分: 1
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
)
type Todo struct {
Mobiles []string `json:"mobiles"`
Laptops []string `json:"laptops"`
Cars []string `json:"cars"`
}
func main() {
jsonFile, err := os.Open("file.json")
if err != nil {
panic(err)
}
defer jsonFile.Close()
byteValue, err := ioutil.ReadAll(jsonFile)
if err != nil {
panic(err)
}
var todo Todo
json.Unmarshal([]byte(byteValue), &todo)
fmt.Println(todo)
fmt.Println(todo.Cars)
}
第一个输出是你的 JSON 文件
{[iPhone 13 Pro OnePlus 10 Pro Google Pixel 6] [Dell XSP 13 Acer Chromebook Spin Lenovo ThinkPad x1] [Suzuki Crossover Golf GTI Hyundai Tucson Hyundai Kona]}
第二个输出是汽车列表
[Suzuki Crossover Golf GTI Hyundai Tucson Hyundai Kona]
英文:
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
)
type Todo struct {
Mobiles []string `json:"mobiles"`
Laptops []string `json:"laptops"`
Cars []string `json:"cars"`
}
func main() {
jsonFile, err := os.Open("file.json")
if err != nil {
panic(err)
}
defer jsonFile.Close()
byteValue, err := ioutil.ReadAll(jsonFile)
if err != nil {
panic(err)
}
var todo Todo
json.Unmarshal([]byte(byteValue), &todo)
fmt.Println(todo)
fmt.Println(todo.Cars)
}
the first output will be your json file
> {[iPhone 13 Pro OnePlus 10 Pro Google Pixel 6] [Dell XSP 13 Acer
> Chromebook Spin Lenovo ThinkPad x1] [Suzuki Crossover Golf GTI Hyundai
> Tucson Hyundai Kona]}
and the second the cars
> [Suzuki Crossover Golf GTI Hyundai Tucson Hyundai Kona]
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