It looks these two methods both save a BasicDbObject to a collection instance.What is the difference between these two methods? com.mongodb.DBCollection.Insert() com.mongodb.DBCollection.Save()
Save can only save one object at a time. If _id is provided and it already exists, the new document will overwrite the previously existing one. If it doesn't exist, it will do an insert.
Insert can take a single object or an ArrayList of objects and do a "bulk insert" of them.
If you give an existing _id to an insert it will cause a duplicate Id exception.
.insert
is only for insert, while .save
can do insert or update.
com.mongodb.DBCollection.Save
Saves an object to this collection (does insert or update based on the object _id).
Save will either insert or update if the document has a set _id and insert will just insert.
You can read more about it here: http://www.mongodb.org/display/DOCS/Updating/#Updating- {{save%28%29}}inthemongoshell
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