我是一个新手，但这是我目前为止收集到的:

package srf

import (
    "bytes"
    "encoding/json"
    "os"
)

func WriteDataToFileAsJSON(data interface{}, filedir string) (int, error) {
    //write data as buffer to json encoder
    buffer := new(bytes.Buffer)
    encoder := json.NewEncoder(buffer)
    encoder.SetIndent("", "\t")

    err := encoder.Encode(data)
    if err != nil {
        return 0, err
    }
    file, err := os.OpenFile(filedir, os.O_RDWR|os.O_CREATE, 0755)
    if err != nil {
        return 0, err
    }
    n, err := file.Write(buffer.Bytes())
    if err != nil {
        return 0, err
    }
    return n, nil
}

这是函数的执行，而且是标准的

b, _ := json.MarshalIndent(SomeType, "", "\t")

代码:

package main

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

    minerals "./minerals"
    srf "./srf"
)

func main() {

    //array of Test struct
    var SomeType [10]minerals.Test

    //Create 10 units of some random data to write
    for a := 0; a < 10; a++ {
        SomeType[a] = minerals.Test{
            Name:   "Rand",
            Id:     123,
            A:      "desc",
            Num:    999,
            Link:   "somelink",
            People: []string{"John Doe", "Aby Daby"},
        }
    }

    //writes aditional data to existing file, or creates a new file
    n, err := srf.WriteDataToFileAsJSON(SomeType, "test2.json")
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println("srf printed ", n, " bytes to ", "test2.json")

    //overrides previous file
    b, _ := json.MarshalIndent(SomeType, "", "\t")
    ioutil.WriteFile("test.json", b, 0644)

}

一个简单的货架上漂亮的打印机。可以通过以下方法将其编译为二进制文件:

go build -o jsonformat jsonformat.go

它从标准输入读取，写入标准输出，并允许设置缩进:

package main

import (
    "bytes"
    "encoding/json"
    "flag"
    "fmt"
    "io/ioutil"
    "os"
)

func main() {
    indent := flag.String("indent", "  ", "indentation string/character for formatter")
    flag.Parse()
    src, err := ioutil.ReadAll(os.Stdin)
    if err != nil {
        fmt.Fprintf(os.Stderr, "problem reading: %s", err)
        os.Exit(1)
    }

    dst := &bytes.Buffer{}
    if err := json.Indent(dst, src, "", *indent); err != nil {
        fmt.Fprintf(os.Stderr, "problem formatting: %s", err)
        os.Exit(1)
    }
    if _, err = dst.WriteTo(os.Stdout); err != nil {
        fmt.Fprintf(os.Stderr, "problem writing: %s", err)
        os.Exit(1)
    }
}

它允许运行bash命令，如:

cat myfile | jsonformat | grep "key"

MarshalIndent将允许您输出带有缩进和间距的JSON。例如:

{
    "data": 1234
}

缩进参数指定要缩进的字符序列。因此,json。MarshalIndent(data， ""， "")将使用四个空格进行缩进。

我是一个新手，但这是我目前为止收集到的:

package srf

import (
    "bytes"
    "encoding/json"
    "os"
)

func WriteDataToFileAsJSON(data interface{}, filedir string) (int, error) {
    //write data as buffer to json encoder
    buffer := new(bytes.Buffer)
    encoder := json.NewEncoder(buffer)
    encoder.SetIndent("", "\t")

    err := encoder.Encode(data)
    if err != nil {
        return 0, err
    }
    file, err := os.OpenFile(filedir, os.O_RDWR|os.O_CREATE, 0755)
    if err != nil {
        return 0, err
    }
    n, err := file.Write(buffer.Bytes())
    if err != nil {
        return 0, err
    }
    return n, nil
}

这是函数的执行，而且是标准的

b, _ := json.MarshalIndent(SomeType, "", "\t")

代码:

package main

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

    minerals "./minerals"
    srf "./srf"
)

func main() {

    //array of Test struct
    var SomeType [10]minerals.Test

    //Create 10 units of some random data to write
    for a := 0; a < 10; a++ {
        SomeType[a] = minerals.Test{
            Name:   "Rand",
            Id:     123,
            A:      "desc",
            Num:    999,
            Link:   "somelink",
            People: []string{"John Doe", "Aby Daby"},
        }
    }

    //writes aditional data to existing file, or creates a new file
    n, err := srf.WriteDataToFileAsJSON(SomeType, "test2.json")
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println("srf printed ", n, " bytes to ", "test2.json")

    //overrides previous file
    b, _ := json.MarshalIndent(SomeType, "", "\t")
    ioutil.WriteFile("test.json", b, 0644)

}

//You can do it with json.MarshalIndent(data, "", "  ")

package main

import(
  "fmt"
  "encoding/json" //Import package
)

//Create struct
type Users struct {
    ID   int
    NAME string
}

//Asign struct
var user []Users
func main() {
 //Append data to variable user
 user = append(user, Users{1, "Saturn Rings"})
 //Use json package the blank spaces are for the indent
 data, _ := json.MarshalIndent(user, "", "  ")
 //Print json formatted
 fmt.Println(string(data))
}

如果您想将一个对象转换为JSON，那么接受的答案是非常好的。这个问题还提到了漂亮打印任何JSON字符串，这就是我试图做的。我只是想从POST请求(特别是CSP违反报告)漂亮地记录一些JSON。

要使用MarshalIndent，必须将其解编组到一个对象中。如果你需要，那就去吧，但我不需要。如果你只是需要漂亮地打印一个字节数组，普通缩进是你的朋友。

这是我最后得出的结论:

import (
    "bytes"
    "encoding/json"
    "log"
    "net/http"
)

func HandleCSPViolationRequest(w http.ResponseWriter, req *http.Request) {
    body := App.MustReadBody(req, w)
    if body == nil {
        return
    }

    var prettyJSON bytes.Buffer
    error := json.Indent(&prettyJSON, body, "", "\t")
    if error != nil {
        log.Println("JSON parse error: ", error)
        App.BadRequest(w)
        return
    }

    log.Println("CSP Violation:", string(prettyJSON.Bytes()))
}