有人知道在Go中漂亮打印JSON输出的简单方法吗?
我想漂亮地打印json的结果。Marshal,以及格式化现有的JSON字符串,以便更容易阅读。
有人知道在Go中漂亮打印JSON输出的简单方法吗?
我想漂亮地打印json的结果。Marshal,以及格式化现有的JSON字符串,以便更容易阅读。
当前回答
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)
}
其他回答
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。
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()
}
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"
}
//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))
}
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)
}