摘要:Java -MongoDB Add DBRef
mongo = this.dao.getMongo();//取的Mongo物件,自行撰寫
db = this.dao.getDB(mongo);//取得DB物件，自行撰寫
DBCollection collection = db.getCollection(this.collection_name);
obj.append("ref_field",new DBRef(db,"ref_collection_name",obj.getString("ref_field_id")));
collection.save(obj)