使用java操作mongodb

Mongo mg = new Mongo("localhost", 27017);

db = mg.getDB("CRUD");
// get collection
dc = db.getCollection("test");

//Update
BasicDBObject query = new BasicDBObject();
query.put("name", "hulu22");
query.put("title", "PO");
BasicDBObject newDoc = new BasicDBObject();
newDoc.put("$set", new BasicDBObject("title", "PM").append("name", "hulu22"));// $unset: Removes the specified field from a document.

dc.update(query, newDoc);

dc.update(query, newDoc, false, false);

dc.updateMulti(query, newDoc);