go-读写json文件

package mainimport ( ???"encoding/json" ???"fmt" ???"os")type PersonInfo struct { ???Name ???string ???age ????int32 ???Sex ????bool ???Hobbies []string}func main() { ???writeFile() ???readFile()}func readFile() { ???filePtr, err := os.Open("person_info.json") ???if err != nil { ???????fmt.Println("Open file failed [Err:%s]", err.Error()) ???????return ???} ???defer filePtr.Close() ???var person []PersonInfo ???// 创建json解码器 ???decoder := json.NewDecoder(filePtr) ???err = decoder.Decode(&person) ???if err != nil { ???????fmt.Println("Decoder failed", err.Error()) ???} else { ???????fmt.Println("Decoder success") ???????fmt.Println(person) ???}}func writeFile() { ???personInfo := []PersonInfo{{"David", 30, true, []string{"跑步", "读书", "看电影"}}, {"Lee", 27, false, []string{"工作", "读书", "看电影"}}} ???// 创建文件 ???filePtr, err := os.Create("person_info.json") ???if err != nil { ???????fmt.Println("Create file failed", err.Error()) ???????return ???} ???defer filePtr.Close() ???// 创建Json编码器 ???encoder := json.NewEncoder(filePtr) ???err = encoder.Encode(personInfo) ???if err != nil { ???????fmt.Println("Encoder failed", err.Error()) ???} else { ???????fmt.Println("Encoder success") ???}

 ??// 带JSON缩进格式写文件
　　//data, err := json.MarshalIndent(personInfo, "", " ?")
 ??//if err != nil {
 ??// fmt.Println("Encoder failed", err.Error())
 ??//
 ??//} else {
 ??// fmt.Println("Encoder success")
 ??//}
 ??//
 ??//filePtr.Write(data)

}