【解决办法】DatasetVectorInfo datasetvectorinfo = new DatasetVectorInfo();
datasetvectorinfo.setType(DatasetType.MODEL);
datasetvectorinfo.setName("New_Model_1");
DatasetVector datasetVector = datasource.getDatasets().create(datasetvectorinfo);
datasetVector.setPrjCoordSys(new PrjCoordSys(4326));