这是一个例子：
import com.mongodb.Mongo;import com.mongodb.DBCollection;import com.mongodb.BasicDBObject;import com.mongodb.DBCursor;import com.mongodb.DB;public class MongoTest { public static void main(String[] args) throws Exception { // connect to the local database server Mongo m = new Mongo(); DB db = m.getDB( "test" ); DBCollection coll = db.getCollection("test"); // delete all the data from the 'test' collection coll.drop(); // make a document BasicDBObject doc = new BasicDBObject(); doc.put("id", 7); doc.put("title", "test4"); doc.put("modified", "2012-09-27"); BasicDBObject status = new BasicDBObject(); status.put("id", "1"); status.put("name", "Expired"); doc.put("status", status); // insert coll.insert(doc); BasicDBObject query = new BasicDBObject("status.name", "Expired"); // run the query and print the results out DBCursor cursor = coll.find(query); try { while (cursor.hasNext()) { System.out.println(cursor.next()); } } finally { cursor.close(); } m.close(); }}
