http://studygolang.com/articles/810
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"`
}
type Object []interface{}
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"]}`
jsonStr = `{"accessToken":"507b5e08ee444dck887b66bd08672905",
"clientToken":"64e3a5415bfe405d9485f1jf2ea5c68e",
"selectedProfile":{"id":"selID","name":"Bluek404"},
"availableProfiles":[{"id":"测试ava","name":"Bluek404"}]}`
//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)
mapTmp := dat["selectedProfile"].(map[string]interface {})
fmt.Println(mapTmp["id"])
/*
var dat2 map[string]interface{}
if err := json.Unmarshal([]byte(jsonStr), &dat2); err == nil {
fmt.Println( dat2["firstName"])
}
*/
mapTmp2 := (dat["availableProfiles"].([]interface {}))[0].(map[string]interface {})
//mapTmp3 := mapTmp2[0].(map[string]interface {})
fmt.Println(mapTmp2["id"])
}
//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)
}
}
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