Import Data to Realm Database

问题

I want to use a centralized database and am looking at various options to do so. From my understanding, I have three main options: SQLite, Realm, and CoreData. Are these options fine for a large centralized database for all users.

Additionally, I am trying to import data from JSON and CSV into a Realm database. Does Realm have this functionality?

回答1:

As for now Realm does not seem to have the import functionality that you need. Check this thread for more information.

Realm does have a great documentation that you can read at Realm and for SQLite there is this framework (there are for sure more out there) and they both support Swift 2.x. You have to check what suits your requests most.

I can also recommend you to read this database thread at reddit.

回答2:

public String composeJsonFromRealm(){
        ArrayList<HashMap<String, String>> wordList;
        wordList = new ArrayList<HashMap<String, String>>();
       // Build the query looking at all users:
        // Execute the query:
        RealmResults<User> users = realm.where(User.class).findAll();

        if (users.size()>0){
                User user = users.first();
                HashMap<String, String> map = new HashMap<String, String>();
                map.put("name", user.getName());
                map.put("email",user.getEmail());
                wordList.add(map);


        }

        Gson gson = new GsonBuilder().create();

        return gson.toJson(wordList);

    }