Java / MapStruct Java Interview questions part 2
What is MapStruct?
MapStruct is a Java annotation processor that generates type-safe bean mapping code at compile time. You write a mapper interface declaring source and target types, and MapStruct produces a plain Java implementation class that copies fields between them.
Because the mapping code is generated during compilation rather than resolved through reflection at runtime, errors such as missing or mismatched properties surface as compiler warnings or errors instead of failing silently in production.
It is commonly used to convert entities to DTOs and back in layered applications such as Spring Boot services.
MapStruct generates mapping code:
A typical use case for MapStruct is:
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