responsewriter的另一个例子。

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

func main() {
    var w http.ResponseWriter

    type About struct {
        ProgName string
        Version string
    }
    goObj := About{ProgName: "demo", Version: "0.0.0"}
    beautifulJsonByte, err := json.MarshalIndent(goObj, "", "  ")
    if err != nil {
        panic(err)
    }
    _, _ = w.Write(beautifulJsonByte)
}

输出

{
  "ProgName": "demo",
  "Version": "0.0.0"
}

如果你想创建一个命令行工具来漂亮地打印JSON

package main

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


func main(){

    var out bytes.Buffer

    reader := bufio.NewReader(os.Stdin)
    text, _ := reader.ReadString('\n')

    err := json.Indent(&out, []byte(text), "", "  ")
    if err != nil {
      fmt.Println(err)
    }

    fmt.Println(string(out.Bytes()))
}

echo "{\"boo\":\"moo\"}" | go run main.go 

将产生以下输出:

{
  "boo": "moo"
}

请随意构建二进制文件

go build main.go

然后把它放到/usr/local/bin中

这是我用的。如果它不能漂亮地打印JSON，它只返回原始字符串。用于打印应该包含JSON的HTTP响应。

import (
    "encoding/json"
    "bytes"
)

func jsonPrettyPrint(in string) string {
    var out bytes.Buffer
    err := json.Indent(&out, []byte(in), "", "\t")
    if err != nil {
        return in
    }
    return out.String()
}

为了更好地使用内存，我想这样更好:

var out io.Writer
enc := json.NewEncoder(out)
enc.SetIndent("", "    ")
if err := enc.Encode(data); err != nil {
    panic(err)
}

//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))
}

使用json。带字符串的MarshalIndent

这个easyPrint函数接受参数数据(任何类型的数据)，并将其打印成预期的(漂亮的)JSON格式。

import (
  "encoding/json"
  "log"
)

func easyPrint(data interface{}) {
  manifestJson, _ := json.MarshalIndent(data, "", "  ")

  log.Println(string(manifestJson))
}

使用name参数。

TODO:使参数名可选。

func easyPrint(data interface{}, name string) {
  manifestJson, _ := json.MarshalIndent(data, "", "  ")

  log.Println(name + " ->", string(manifestJson))
}