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Spring Boot CRUD Application
Last Updated : 26 May, 2026
title: CRUD Application with Spring Boot
Spring Framework19 words3 headingsExamples included
title: CRUD Application with Spring Boot description: Complete CRUD app with JPA
Entity
java exampleWoHoTech
@Entity
@Table(name = "students")
public class Student {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(nullable = false)
private String name;
private int age;
private double marks;
// Constructors, getters, setters, toString
}Repository
java exampleWoHoTech
@Repository
public interface StudentRepository extends JpaRepository<Student, Long> {
List<Student> findByName(String name);
List<Student> findByMarksGreaterThan(double marks);
Optional<Student> findByNameAndAge(String name, int age);
@Query("SELECT s FROM Student s WHERE s.marks > :minMarks ORDER BY s.marks DESC")
List<Student> findTopStudents(@Param("minMarks") double minMarks);
}Service
java exampleWoHoTech
@Service
@Transactional
public class StudentService {
@Autowired
private StudentRepository repository;
public List<Student> findAll() { return repository.findAll(); }
public Optional<Student> findById(Long id) { return repository.findById(id); }
public Student save(Student student) { return repository.save(student); }
public void deleteById(Long id) { repository.deleteById(id); }
public Student update(Long id, Student updated) {
Student existing = repository.findById(id)
.orElseThrow(() -> new ResourceNotFoundException("Student not found: " + id));
existing.setName(updated.getName());
existing.setAge(updated.getAge());
existing.setMarks(updated.getMarks());
return repository.save(existing);
}
}Exam Focus
Revise definitions, diagrams, examples, and short-answer points for Spring Boot CRUD Application.
Interview Use
Prepare one clear explanation, one practical example, and one common mistake for this Java topic.
Search Terms
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