yooniversal

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yooniversal

package jpabook.start;

import javax.persistence.*;
import java.util.List;

public class JpaMain {

    public static void main(String[] args) {

        //엔티티 매니저 팩토리 생성

yooniversal

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence" version="2.1">

    <persistence-unit name="jpabook">

        <properties>

            <!-- 필수 속성 -->
            <property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/>
            <property name="javax.persistence.jdbc.user" value="sa"/>

yooniversal

import javax.persistence.*;

@Entity
@Table(name="MEMBER")
public class Member {

    @Id
    @Column(name = "ID")
    private String id;

yooniversal

public class Member {

    private String id;
    private String username;
    private Integer age;

    public String getId() {
        return id;
    }

yooniversal

#include <string>
#include <vector>

using namespace std;

const int INF = 987654321;

char get_score(double cur) {
    if (cur >= 90.0) return 'A';
    if (cur >= 80.0) return 'B';

yooniversal

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 {

yooniversal

public Long join(Member member) {

    long start = System.currentTimeMillis();

    try {
        // 핵심 관심 사항
        validateDuplicateMember(member);
        memberRepository.save(member);
        return member.getId();
    } finally {

yooniversal

package hello.hellospring.service;

import hello.hellospring.repository.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.persistence.EntityManager;
import javax.sql.DataSource;

yooniversal

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<Member, Long>, MemberRepository {

    @Override