Swift 4 - 如何像Java中的Gson一样自动将Json转换为swift对象

I am new in Swift 4 and trying to figure out How to convert Json to swift Object automatically like Gson in java. Is there is any plugin i can use which can convert my json to object and vice versa. I have tried to use SwiftyJson Library but couldnt understand what is syntax for directly converting the json to object mapper. In Gson conversion is as follow :I am new in Swift 4 and trying to figure out Ho