Java background accepts the processing of a nested JSON array in a JSON array __java

First, mobile phone to the Java background interface, sometimes due to the needs of the business needs to pass the data JSON array nested JSON array, background received after the need to deal with

Eg: front-end data structure:
			front-end data structure: Linejson =[{"startprovince": "2", "Startcity": "2", "Carlist": [{"Carid": "1", "Telephone" : "15091060694", "remark": "Memo"}]}]  
			background received: String Linejson=getpara ("Linejson");
			Jsonarray Linearray=jsonarray.fromobject (Linejson);
			for (int j=0;j<linearray.size (); j + +) {
				jsonobject Line=jsonobject.fromobject (Linearray.get (j));
				String startprovince=line.getstring ("startprovince");
				Jsonarray Carlist=jsonarray.fromobject (line.getstring ("Carlist"));
				for (int i=0;i<carlist.size (); i++) {
						business logic
				}
			}