MongoDB Java: How can I represent $in query in DBObject?

Question

My schema looks like

Id:
date_created:
vars: {
      NAME:
      VALUE:
      EDITABLE:
      .....

}

I know that using command-line we can select range of documents like

.find({'Id': {$in: ['a', 'b', ...]}}) 

Is it possible to do something similar using DBObject ?

This is because I want to perform update on multiple documents, which have Id in a', 'b',' 'c', ...

Answer 1

刚刚找到http://api.mongodb.org/java/2.8.0/com/mongodb/QueryBuilder.html#in(java.lang.Object ）