http://api.mongodb.com/java/2...
你要找的是这个API ？

// 获取Mongo Client DB 以及Collection
MongoClient mongoClient = new MongoClient("yourip",27017);
MongoDatabase db = mongoClient.getDatabase("test");
MongoCollection<Document> collection = db.getCollection("test");
// 查询条件
BasicDBObject basicDBObject = new BasicDBObject();
basicDBObject.put("c_oid", "old");
// 查询结果
Iterable<Document> documents = collection.find(basicDBObject);
for (Document document : documents) {
    String cTitle = document.getString("c_title"); // 读取响应的数据
}