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What is a class mapping and do I need to create one before I can crate or retrieve a Java object from a database?

April 26, 2017class crate create database Java Mapping object

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What is a class mapping and do I need to create one before I can crate or retrieve a Java object from a database?

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DB Mapper requires some specific information about the objects to be saved, and the database to which they are saved. The class mapping includes information such as which tables and columns of the database are used to store the various fields of the class.