Field studentRepository in com.example.demo.StudentController required a bean of type 'com.example.demo.StudentRepository' that could not be found. Action: Consider defining a bean of type 'com.example.demo.StudentRepository' in your configuration. @RestController public class StudentController { @Autowired private StudentRepository studentRepository; @GetMapping(value = "/findAll") public List<Student> studentList(){ return studentRepository.findAll(); } } StudentRepository 繼承 JpaRepository，應(yīng)該是個(gè)最簡(jiǎn)單的例子了 一共就一個(gè)包，SpringBootApplication和Controller都放在一個(gè)包下面，應(yīng)該不會(huì)出現(xiàn)網(wǎng)上的順序的問(wèn)題