golang將結構體轉換成json，json轉換成結構體

1、將結構體轉換成json需要用到marshl函數（或者marshlIndent（）函數）。區別：marshl函數沒有將json格式化輸出，輸出是一個json的字串。----不利於直接查看json的結構。maeshldent函數可以將json格式化輸出，可閱讀性提高了。2、將json字串轉換成結構體需要用到marshl()函數。執行個體如下：```gopackage mainimport ( "log" "encoding/json" "fmt")type Movie struct{ Title string Year int `json:"released"` Color bool `json:"color, omitempty"` Actors []string}func main(){ var movies = []Movie{ {Title:"Casabanca", Year: 1942, Color:false, Actors:[]string{"Humphrey Bogart", "Ingrid Bergman"}}, {Title:"Casabanca2", Year: 1962, Color:true, Actors:[]string{"Humphrey Paul"}}, } data, err := json.Marshal(movies) if err != nil { log.Fatalf("Json marshaling failed：%s", err) } fmt.Printf("%s\n", data) var movies2 []struct{Title string} // movies2 := make([]Movie, 10) if err3 := json.Unmarshal(data, &movies2); err3 !=nil{ log.Fatalf("JSON unmarshling failed: %s", err) } fmt.Println("*****************", movies2) data2, err2 := json.MarshalIndent(movies, ""," ") if err2 != nil { log.Fatalf("Json marshlindent failed：%s", err) } fmt.Printf("%s\n", data2) }//2package mainimport ( "log" "encoding/json" "fmt")type Movie struct{ Title string Year int `json:"released"` Color bool `json:"color, omitempty"` Actors []string}func main(){ var movies = []Movie{ {Title:"Casabanca", Year: 1942, Color:false, Actors:[]string{"Humphrey Bogart", "Ingrid Bergman"}}, {Title:"Casabanca2", Year: 1962, Color:true, Actors:[]string{"Humphrey Paul"}}, } data, err := json.Marshal(movies) if err != nil { log.Fatalf("Json marshaling failed：%s", err) } fmt.Printf("%s\n", data) var movies2 []struct{Title string} // movies2 := make([]Movie, 10) if err3 := json.Unmarshal(data, &movies2); err3 !=nil{ log.Fatalf("JSON unmarshling failed: %s", err) } fmt.Println("*****************", movies2) data2, err2 := json.MarshalIndent(movies, ""," ") if err2 != nil { log.Fatalf("Json marshlindent failed：%s", err) } fmt.Printf("%s\n", data2)}```133 次點擊