CubeOpenSearchRequest request = new CubeOpenSearchRequest();
        request.setQueryString("ti:汽车");
        request.setSource(15);
        request.setLevel(ApiLevel.ONE);
        request.setPageIndex(1);
        request.setPageSize(1);
        request.setSortField(PatField.ApplicationNumber);
        request.setFieldOrder(FieldOrder.DESC);
        CubePatentSearchResponse response = CLIENT.execute(request);
        List<Document<PatField>> documents = response.getDocuments();
        long totalHits = response.getTotalHits();
                            
                        

                            
    "documents":[
		{
			"fieldValues":{
				"an":"CN88210864",
				"ad":"19880307",
				"pn":"CN88210864",
				"pd":"19881207",
				"ti":"汽车售票员专用包",
				"pa":[
					"杨开山"
				],
				"id":"CN88210864"
			},
			"hlFieldValues":{
				"pa":[
					"杨开山"
				],
				"ad":[
					"19880307"
				],
				"pd":[
					"19881207"
				],
				"ti":[
					"<span class=\"c-highligth-default\">汽</span><span class=\"c-highligth-default\">车</span>售票员专用包"
				],
				"id":[
					"CN88210864"
				],
				"an":[
					"CN88210864"
				],
				"pn":[
					"CN88210864"
				]
			}
		}
	],
	"groupedHits":0,
	"qTime":197,
	"success":true,
	"totalHits":277915
}
                            
                        

                            
    {
       "errorCode":"500",
       "groupedHits":0,
       "msg":"patFields cannot be empty or null!",
       "qTime":0,
       "success":false,
       "totalHits":0
    }