Programmer DD

May 26, 2022 · Backend Development

How to Fix Spring Boot 2.6 Swagger NullPointerException by Switching to ant_path_matcher

After upgrading to Spring Boot 2.6, a NullPointerException occurs when integrating Swagger due to the new PathPatternParser, and the issue can be resolved by changing the path‑matching strategy to ant_path_matcher or adding a custom WebMvcEndpointHandlerMapping bean.