Map me if you can! Painless bean mappings with MapStruct
summary
MapStruct generates Java mapper implementations at compile time from plain interfaces, producing compile-time code generation that yields plain method calls and no reflection so mapping runs fast and debuggable. It detects unmapped target properties, performs built-in conversions (BigDecimal→double, LocalDate↔String with format), supports custom methods and expressions, uses other mappers, integrates via annotationProcessorPath for Maven and IDE plugins (Eclipse/IntelliJ), and outputs type-safe, reflection-free mappings with warnings or errors when mappings are incomplete.
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chapters (7)
- 0:00Start
- 1:02The Problem
- 2:17How to implement mappings?
- 3:16Introducing Map Struct
- 12:16Advantages of code generation
- 13:35What else is there?
- 14:22Resources
