Sujin's Dlog

AOP : Aspect Oriented Programming package hello.hellospring.aop; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.springframework.stereotype.Component; @Aspect @Component public class TimeTraceAop { @Around("execution(* hello.hellospring..*(..))") public Object execute(ProceedingJoinPoint joinPoint) thro..

package hello.hellospring.service; import hello.hellospring.domain.Member; import hello.hellospring.repository.MemberRepository; import hello.hellospring.repository.MemoryMemberRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation...

package hello.hellospring.repository; import hello.hellospring.domain.Member; import org.springframework.data.jpa.repository.JpaRepository; import java.util.Optional; public interface SpringDataJpaMemberRepository extends JpaRepository { Optional findByName(String name); } ▶ 스프링 데이터 JPA 회원 리푖토리 package hello.hellospring; import hello.hellospring.repository.JpaMemberRepository; import hello.hello..

- JPA는 기존의 반복 코드는 물론이고, 기본적인 SQL도 JPA가 직접 만들어서 실행해줌 - JPA를 사용하면 SQL과 데이터 중심의 설계에서 객체 중심의 설계로 패러다임을 전환함 - JPA를 사용하면 개발 생산성을 크게 높일 수 있음 plugins { id 'org.springframework.boot' version '2.7.2' id 'io.spring.dependency-management' version '1.0.12.RELEASE' id 'java' } group = 'hello' version = '0.0.1-SNAPSHOT' sourceCompatibility = '17' repositories { mavenCentral() } dependencies { implementation 'o..

package hello.hellospring.repository; import hello.hellospring.domain.Member; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import org.springframework.jdbc.core.namedparam.MapSqlParameterSource; import org.springframework.jdbc.core.simple.SimpleJdbcInsert; import javax.sql.DataSource; import java.util.HashMap; import java.util.List; import jav..

package hello.hellospring.service; import hello.hellospring.domain.Member; import hello.hellospring.repository.MemberRepository; import hello.hellospring.repository.MemoryMemberRepository; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boo..

spring.datasource.url=jdbc:h2:tcp://localhost/~/test spring.datasource.driver-class-name=org.h2.Driver spring.datasource.username=sa ▶ application.properties에 스프링부트 데이터베이스 연결 설정 추가 스프링부트 2.4부터는 spring.datasource.username=sa를 꼭 추가해야 함 → 추가하지 않으면 Wrong user name or password 오류 발생 plugins { id 'org.springframework.boot' version '2.7.2' id 'io.spring.dependency-management' version '1.0.12.RELEASE' i..

https://www.h2database.com/ H2 Database Engine (redirect) H2 Database Engine Welcome to H2, the free SQL database. The main feature of H2 are: It is free to use for everybody, source code is included Written in Java, but also available as native executable JDBC and (partial) ODBC API Embedded and client/server mo www.h2database.com ▶ 링크에 접속해 h2 데이터베이스 설치 ▶ h2 console 실행 → 연결 ▶ drop table if exis..

package hello.hellospring.controller; import hello.hellospring.domain.Member; import hello.hellospring.service.MemberService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; imp..

package hello.hellospring.controller; import hello.hellospring.domain.Member; import hello.hellospring.service.MemberService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; @Controller public class MemberControlle..