使用Java和MongoDB创建“包含”查询

Question

我正在尝试按照此post在Java中创建“包含”查询。问题是它给了我一个错误。

目前我有以下代码：

MongoClient mongoClient = null;
DBCursor cursor = null;

mongoClient = new MongoClient( "localhost" , 27017 );
DB db = mongoClient.getDB("bd-films");
DBCollection coll = db.getCollection("films");

DBObject query = new BasicDBObject({"title" : {$regex : "name"}});         
cursor = coll.find(query);

它给我的错误是在'查询'行：

Syntax error on token ""title"", invalid Label
Syntax error, insert ";" to complete Statement
Syntax error on token ")", delete this token

我使用光标将其插入JTable 驱动程序：mongo-java-driver-3.4.2
提前谢谢。

Answer 1

对java驱动程序3.x版本使用新的Document和MongoCollection api。

 MongoClient mongoClient = new MongoClient("localhost", 27017);
 MongoDatabase db = mongoClient.getDatabase("bd-films");
 MongoCollection<Document> coll = db.getCollection("films");
 List<Document> results  = coll.find(Filters.regex("title", "name")).into(new ArrayList<>())

访问MongoCursor，

FindIterable<Document> results  = coll.find(Filters.regex("title", "name"));
MongoCursor<Document> cursor = results.iterator();