多个 map[string] 接口并将它们映射到多个 json 文件 GOLANG

Question

How can i create and array of maps[string]interface to add multiple json files (not all json in one, but in different). I created a code, that add all json files in one. But in the future i need to compare field in map[string]interface. I think that need to create a loop. Here my program code:

var master map[string]interface{}

func main() {
    fileIndex := 3 // three json files. All named test1.json, test2.json and test3.json
    for i := 1; i <= fileIndex; i++ {
        fileName := fmt.Sprintf("%s%d%s", "test", i, ".json")
        // Open jsonFile
        jsonFile, err := os.Open(fileName)
        if err != nil {
            log.Println("Error:", err)
        }

        defer jsonFile.Close()

        byteValue, _ := ioutil.ReadAll(jsonFile)

        json.Unmarshal(byteValue, &master)

        fmt.Println(master)

    }
}

And here my 3 json: First:

 {
     "name":"Kate",
     "date":"2013-04-23T19:24:59.511Z",
     "data":"is nice"
 }

Second:

{
    "name":"Gleison",
    "date":"2012-04-23T19:25:00.511Z",
    "data":"is a good person"
}

Third:

{
    "name":"Rodrigo",
    "date":"2013-04-23T20:24:59.511Z",
    "data":"is kind"
}

It is necessary to divide them into different map[string]interface. Without creating struct.

Answer 1

For an array, I think you are looking []map[string]interface{}. You can simply create this variable and append it if I understood your question correctly

Here is a modified example

package main

import (
    "encoding/json"
    "fmt"
    "io/ioutil"
    "log"
    "os"
)

func main() {

    var master map[string]interface{}
    var allMaster []map[string]interface{}

    fileIndex := 3 // three json files. All named test1.json, test2.json and test3.json
    for i := 1; i <= fileIndex; i++ {
        fileName := fmt.Sprintf("%s%d%s", "test", i, ".json")
        // Open jsonFile
        jsonFile, err := os.Open(fileName)
        if err != nil {
            log.Println("Error:", err)
        }

        defer jsonFile.Close()

        byteValue, _ := ioutil.ReadAll(jsonFile)

        err = json.Unmarshal(byteValue, &master)
        if err != nil {
            log.Fatal(err)
        }

        allMaster = append(allMaster, master)
        fmt.Println(allMaster)

    }
}