[JAVA] Springboot DI(의존성 주입)

 

Service의 구조체의 의존성 주입을 위해(Controller)

1. Autowired 롬복을 사용

2. 최종적인 값(변하지 않는 객체 값) final 사용 

 

 

StudentController.java

...
public class StudentController {

    private final StudentService studentService;

    @Autowired
    public StudentController(StudentService studentService) {
        this.studentService = studentService;
    }

Business Logic을 담는 Service 클래스 생성

Component 대신 Service 롬복 사용

 

StudentService.java

package com.js.app.student;

import java.time.LocalDate;
import java.time.Month; 
import java.util.List;

import org.springframework.stereotype.Service;

@Service
public class StudentService {
    public List<Student> getStudents() {
        return List.of(new Student(
            1L, "mariam","mariam@gmail.com",
            LocalDate.of(2000, Month.JANUARY,6),
             21)
        );

    }
}

참고

https://www.youtube.com/watch?v=9SGDpanrc8U&t=1600s 

 

끝