SpringMongo Case insensitive search regex
Query query = new Query( Criteria.where(propName).regex(value.toString(), "i"));

> db.foo.insert({name: "Bill"});
> db.foo.insert({name: "Bill status"});
> db.foo.insert({name: "another Bill"});
> db.foo.find()
{ "_id" : ObjectId("5018e182a499db774b92bf25"), "name" : "Bill" }
{ "_id" : ObjectId("5018e191a499db774b92bf26"), "name" : "Bill status" }
{ "_id" : ObjectId("5018e19ba499db774b92bf27"), "name" : "another Bill" }
> db.foo.find({name: /bill/i})
{ "_id" : ObjectId("5018e182a499db774b92bf25"), "name" : "Bill" }
{ "_id" : ObjectId("5018e191a499db774b92bf26"), "name" : "Bill status" }
{ "_id" : ObjectId("5018e19ba499db774b92bf27"), "name" : "another Bill" }
> db.foo.find({name: /^bill$/i})
{ "_id" : ObjectId("5018e182a499db774b92bf25"), "name" : "Bill" }