java - Crud save function not working spring-boot

Question

(This question already has answers here): question from:https://stackoverflow.com/questions/66066227/crud-save-function-not-working-spring-boot

Answer 1

Use constructor injection

@Service
public class StudentService {
    private final StudentRepository repo;

    public StudentService(StudentRepository repo) {
        this.repo = repo;
    }

Or annotate setter for repo variable with @Autowired (but still constructor injection is preferred)

Same goes for your other class that has next1 method where you are trying to call StudentService

More on topic:

• What exactly is Field Injection and how to avoid it?