jsonObject = {"mmbRetrieveBookingResponse":{"bookingData":null,"isAfterTransactionFromSb":false,"isAllFlightsCancelled":false,"isSuccess":false}}

如图所示的json,取出bookingData判断为null的问题

if(jsonObject.get("bookingData") == null || "null".equals(jsonObject.get("bookingData")) || isEmpty等判断都为true)

 

直接getJsonObject ，由于bookingData为null会报错

用jsonObject.isNull(“bookingData”)可正确判断;

赶项目，匆忙记录，请忽略格式混乱