java mapper?

Question

What does it means by mapper in java?..what is the function of mapper and how does it works?..
please help me...
thank you...

Answer 1

Without a little context, it's not clear what you mean.

There is a Java class called Map, which is used for storing key-value pairs.

I've used an O/R Mapper, which transforms Java classes to/from relational databases (sort of a version of Hibernate, from before Hibernate existed).

Answer 2

A mapper is used to populate an object(class) from a database normally. You'll use a group of these mappers to manipulate, including write, read, and update the datasource and letting it take care of the behind the scenes work of connections and initialization.