{ "_id": { "$oid": "50a5e1cd703d7e9c65326bf9" }, "name":"arthur", "tele": "001-837475" "address":{ "country":"us", "state" : "CA", "city" : "LA" } } }
我的mongodb中存了很多这样的数据.我有这样的检索需求.查找所有来自加州的人.
在shell里是这样query:
db.test.find({"address.state":"CA"})
并且能够返回正确的结果.
我想用mongodb-java-builder来检索数据库.如何书写代码呢?
这个问题已经困扰了我好久了.
这是我的问题的stackoverflow的链接, 也没有人回答.那个回答也不管用.
谢谢了.!
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Mongo db = new Mongo("localhost", 27017); DBCollection coll = db.getCollection("collectionname"); DBObject query = new BasicDBObject("address.state","CA"); DBCursor cursor = coll.find(query); while(cursor.hasNext()){ System.out.println(cursor.next()); } cursor.close()I didn’t read the document carefully. I made such a mistake. I shouldn’t, reflect on it here.