public static void main(String[] args) throws Exception {
    Mongo m = new Mongo("10.18.96.160", 27017);
    
    System.out.println(m.getDatabaseNames());
    
    DB db = m.getDB("test");
    System.out.println(db.getCollectionNames());
    
    DBCollection collection = db.getCollection("foo1");
    
    BasicDBObject info = new BasicDBObject();
    info.put("name", "test");
    
    BasicDBObject emails = new BasicDBObject();
    emails.put("email_1", "test@test.cn");
    emails.put("email_2", "test@test.com");
    info.put("emails", emails);
    
    collection.insert(info);
    
    System.out.println(collection.findOne());
    
    BasicDBObject condition = new BasicDBObject();
    condition.put("email_1", "test@test.cn");
    System.out.println(collection.find(condition));
}