Question

Im using java/mongodb. I would like to create a table (collection) with some users. Well, its working im just not sure about my coding style. Could be this good if i just want to add 3 new persons to the collection?

    BasicDBObject doc = new BasicDBObject();
    doc.put("name", "klaus");
    doc.put("age", 30);
    doc.put("city", "new york");
    col.insert(doc);

    BasicDBObject doc2 = new BasicDBObject();
    doc2.put("name", "mirko");
    doc2.put("age", 23);
    doc2.put("city", "madrid");
    col.insert(doc2);

    BasicDBObject doc3 = new BasicDBObject();
    doc3.put("name", "jon");
    doc3.put("age", 34);
    doc3.put("city", "unknown");
    col.insert(doc3);

Its look so “long”. To add only 3 Persons I have to create always a new BasicDBObject and insert it with the same line code (col.insert(bla))? It cant be ^^ And an other question too: At the first time(doc) im adding name, age and city as column. Why do I have to add “name”, “age” and “city” again and again… I just want to add “mirko”, 23 and “madrid” for doc2.

The last thing what bugs me is that I can add a new Dokument to the Collection with the same(!) values. I could add a new jon with 34 years and the same city. Is this ok? And if yes, I would like to change it. Howto?

Thank you!

Answer 1

Use json for it..

String json = "{'key' : 'value'}"; /* Create json formatted data here */

DBObject dbObject = (DBObject)JSON.parse(json);

collection.insert(dbObject);