लुकअप समर्थन 1.9 संस्करण के बाद से है।
LookupOperation lookupOperation = LookupOperation.newLookup().
from("inventory").
localField("item").
foreignField("sku").
as("inventory_docs");
Aggregation aggregation = Aggregation.newAggregation(lookupOperation);
List<BasicDBObject> results = mongoOperations.aggregate(aggregation, "orders", BasicDBObject.class).getMappedResults();