golang的json操作

package main
import (
	"encoding/json"
	"fmt"
	"os"
)
type ConfigStruct struct {
	Host       string  `json:"host"`
	Port       int   `json:"port"`
	AnalyticsFile   string  `json:"analytics_file"`
	StaticFileVersion int   `json:"static_file_version"`
	StaticDir     string  `json:"static_dir"`
	TemplatesDir   string  `json:"templates_dir"`
	SerTcpSocketHost string  `json:"serTcpSocketHost"`
	SerTcpSocketPort int   `json:"serTcpSocketPort"`
	Fruits      []string `json:"fruits"`
}
type Other struct {
	SerTcpSocketHost string  `json:"serTcpSocketHost"`
	SerTcpSocketPort int   `json:"serTcpSocketPort"`
	Fruits      []string `json:"fruits"`
}
func main() {	
	jsonStr := `{"host": "http://localhost:9090","port": 9090,"analytics_file": "","static_file_version": 1,"static_dir": "E:/Project/goTest/src/","templates_dir": "E:/Project/goTest/src/templates/","serTcpSocketHost": ":12340","serTcpSocketPort": 12340,"fruits": ["apple", "peach"]}`
	//json str 转map
	var dat map[string]interface{}
	if err := json.Unmarshal([]byte(jsonStr), &dat); err == nil {
		fmt.Println("==============json str 转map=======================")
		fmt.Println(dat)
		fmt.Println(dat["host"])
	}
	//json str 转struct
	var config ConfigStruct
	if err := json.Unmarshal([]byte(jsonStr), &config); err == nil {
		fmt.Println("================json str 转struct==")
		fmt.Println(config)
		fmt.Println(config.Host)
	}
	//json str 转struct(部份字段)
	var part Other
	if err := json.Unmarshal([]byte(jsonStr), &part); err == nil {
		fmt.Println("================json str 转struct==")
		fmt.Println(part)
		fmt.Println(part.SerTcpSocketPort)
	}
	//struct 到json str
	if b, err := json.Marshal(config); err == nil {
		fmt.Println("================struct 到json str==")
		fmt.Println(string(b))
	}
	//map 到json str
	fmt.Println("================map 到json str=====================")
	enc := json.NewEncoder(os.Stdout)
	enc.Encode(dat)
	//array 到 json str
	arr := []string{"hello", "apple", "python", "golang", "base", "peach", "pear"}
	lang, err := json.Marshal(arr)
	if err == nil {
		fmt.Println("================array 到 json str==")
		fmt.Println(string(lang))
	}
	//json 到 []string
	var wo []string
	if err := json.Unmarshal(lang, &wo); err == nil {
		fmt.Println("================json 到 []string==")
		fmt.Println(wo)
	}
}

本文来自:开源中国博客

感谢作者:liaojie

查看原文:golang的json操作

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