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package mainimport ("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 轉mapvar dat map[string]interface{}if err := json.Unmarshal([]byte(jsonStr), &dat); err == nil {fmt.Println("==============json str 轉map=======================")fmt.Println(dat)fmt.Println(dat["host"])}//json str 轉structvar config ConfigStructif err := json.Unmarshal([]byte(jsonStr), &config); err == nil {fmt.Println("================json str 轉struct==")fmt.Println(config)fmt.Println(config.Host)}//json str 轉struct(部份欄位)var part Otherif err := json.Unmarshal([]byte(jsonStr), &part); err == nil {fmt.Println("================json str 轉struct==")fmt.Println(part)fmt.Println(part.SerTcpSocketPort)}//struct 到json strif b, err := json.Marshal(config); err == nil {fmt.Println("================struct 到json str==")fmt.Println(string(b))}//map 到json strfmt.Println("================map 到json str=====================")enc := json.NewEncoder(os.Stdout)enc.Encode(dat)//array 到 json strarr := []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 []stringvar wo []stringif err := json.Unmarshal(lang, &wo); err == nil {fmt.Println("================json 到 []string==")fmt.Println(wo)}}