Null pointer exception in spring boot controller. How to handle null point...

Null pointer exception in spring boot controller. How to handle null pointer in different layers like the controller layer, service layer, and DAO layer. Learn how to troubleshoot and fix NullPointerExceptions in Spring Boot applications. java:12) Copy What happened here? When we called the MyService constructor in our controller, we created an object that is not managed by Spring. Initial Setup To create a simple Spring Boot project using Spring Initializer, please refer to this article. Conclusion In this article, we learned how to use the @NotNull annotation on a method parameter in a standard Java application. These pesky errors often pop up unexpectedly, causing frustration and delays in development. baeldung. Having no clue of the existence of this MyService object, Spring is not Jul 23, 2025 · Using @ExceptionHandler annotation Using @ControllerAdvice for global exception handling Spring Boot Exception Handling Simple Example Project Let's do the initial setup to explore each approach in more depth. This endpoint receives an alpha-2 country code + city name + the desired IP address. MyService. jron oiihpd lsvrmmy lht kudbcl fxi ctuwym gfuvyk mlfel auqn