Golang对JSON文件的读写操作

Go语言JSON文件的读写操作

写

package main

import (

"encoding/json"

"fmt"

"os"

)

type Website struct {
    
    

Name string `xml:"name,attr"`

Url string

Course []string

}

func main() {
    
    

info := []Website{
    
    {
    
    "Golang", "http://c.biancheng.net/golang/", []string{
    
    "http://c.biancheng.net/cplus/", "http://c.biancheng.net/linux_tutorial/"}}, {
    
    "Java", "http://c.biancheng.net/java/", []string{
    
    "http://c.biancheng.net/socket/", "http://c.biancheng.net/python/"}}}

// 创建文件

filePtr, err := os.Create("info.json")

if err != nil {
    
    

fmt.Println("文件创建失败", err.Error())

return

}

defer filePtr.Close()

// 创建 json 编码器

encoder := json.NewEncoder(filePtr)

err = encoder.Encode(info)

if err != nil {
    
    

fmt.Println("编码错误", err.Error())

} else {
    
    

fmt.Println("编码成功")

}

}

读

package main

import (

"encoding/json"

"fmt"

"os"

)

type Website struct {
    
    

Name string `xml:"name,attr"`

Url string

Course []string

}

func main() {
    
    

filePtr, err := os.Open("./info.json")

if err != nil {
    
    

fmt.Println("文件打开失败 [Err:%s]", err.Error())

return

}

defer filePtr.Close()

var info []Website

// 创建json解码器

decoder := json.NewDecoder(filePtr)

err = decoder.Decode(&info)

if err != nil {
    
    

fmt.Println("解码失败", err.Error())

} else {
    
    

fmt.Println("解码成功")

fmt.Println(info)

}

}

/**

解码成功

[{Golang http://c.biancheng.net/golang/ [http://c.biancheng.net/cplus/ http://c.biancheng.net/linux_tutorial/]}

{Java http://c.biancheng.net/java/ [http://c.biancheng.net/socket/ http://c.biancheng.net/python/]}]
``
*/