5 Mistakes Developers Make When Building Java APIs (and How to Fix Them)
summary
Five concrete API mistakes with Java and Spring Boot come with specific fixes and a demo repo: inconsistent naming (use kebab-case URLs), misplaced validation (move checks to controller/DTOs with @NotNull validation and return 400s not 500s), inconsistent error handling (centralize with a ControllerAdvice centralized exception handler), returning JPA entities (introduce DTOs instead of entities), and missing versioning. Examples show before/after code and Postman screenshots proving clearer error responses, reduced coupling, and easier future changes.
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chapters (8)
- 0:00Five Java API mistakes
- 2:40Inconsistent naming issues
- 10:57Misplaced validation risks
- 13:21Fixing error handling
- 14:22Raw DB entities risks
- 15:29API versioning benefits
- 17:35Poor API design effects
- 19:21Intentional API design
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