map转json

func MapToJsonDemo1(){
        mapInstances := []map[string]interface{}{}
        instance_1 := map[string]interface{}{"name": "John", "age": 10}
        instance_2 := map[string]interface{}{"name": "Alex", "age": 12}
        mapInstances = append(mapInstances, instance_1, instance_2)

        jsonStr, err := json.Marshal(mapInstances)

        if err != nil {
                fmt.Println("MapToJsonDemo err: ", err)
        }
        fmt.Println(string(jsonStr))
}

又或者:

func MapToJsonDemo2(){
        b, _ := json.Marshal(map[string]int{"test":1, "try":2})
        fmt.Println(string(b))
}