국비학원_70일차(Spring JPA4)

🔻oBootJpa03

🤝@validation(회원가입)

[com.oracle.oBootJpa03.controller]

• MemberController.java

  Logger anotation -> @Slf4j
  생성자 -> @RequiredArgsConstructor

package com.oracle.oBootJpa03.controller;

import java.util.List;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

import com.oracle.oBootJpa03.domain.Address;
import com.oracle.oBootJpa03.domain.Member;
import com.oracle.oBootJpa03.form.MemberForm;
import com.oracle.oBootJpa03.service.MemberService;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;

@Controller
@Slf4j
@RequiredArgsConstructor
public class MemberController {
	
	private final MemberService memberService;
//	public MemberController(MemberService memberService) {
//		this.memberService = memberService;
//	}
	
	// 회원가입이동
	@GetMapping(value = "/members/new")
	public String createForm(Model model) {
		System.out.println("MemberController /members/new Start...");
		log.info("/members/new Start...");
		model.addAttribute("memberForm", new MemberForm());
		return "/members/createMemberForm";
	}
	
	// 회원저장
	@PostMapping(value = "/member/Save")
	public String memberSave(@Valid MemberForm form, BindingResult result) {
		System.out.println("MemberService memberSave Start...");
		if(result.hasErrors()) {
			return "members/createMemberForm";
		}
		Address address = new Address(form.getCity(), form.getStreet(), form.getZipcode());
		Member member = new Member();
		member.setName(form.getName());
		member.setAddress(address);
		memberService.memberSave(member);
		System.out.println("MemberController memberSave After");
		return "redirect:/";
	}
}

[com.oracle.oBootJpa03.service]

• MemberService.java

package com.oracle.oBootJpa03.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.oracle.oBootJpa03.domain.Member;
import com.oracle.oBootJpa03.repository.MemberRepository;

@Service
@Transactional
public class MemberService {
	@Autowired
	private final MemberRepository memberRepository;
	// 생성자 Injection 많이 사용, 생성자가 하나면 생략 가능
	public MemberService(MemberRepository memberRepository) {
		this.memberRepository = memberRepository;
	}
	
	// 회원저장
	public Long memberSave(Member member) {
		System.out.println("MemberService memberSave Before...");
		memberRepository.memberSave(member);
		System.out.println("MemberService memberSave After member.getId()->"+member.getId());
		return member.getId();
	}
}

[com.oracle.oBootJpa03.repository]

• MemberRepository.java

package com.oracle.oBootJpa03.repository;

import javax.persistence.EntityManager;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.oracle.oBootJpa03.domain.Member;

@Repository
public class MemberRepository {
	private final EntityManager em;
	@Autowired
	public MemberRepository(EntityManager em) {
		this.em = em;
	}
	
	public void memberSave(Member member) {
		em.persist(member);
	}
}

[com.oracle.oBootJpa03.domain]

• Address.java

@ToString을 걸어줘서 객체 타입 확인

package com.oracle.oBootJpa03.domain;

import javax.persistence.Embeddable;

import lombok.Getter;
import lombok.ToString;
/*
 *  1. 값 타입은 변경 불가능하게 설계.
 *  2. @Setter 를 제거하고, 생성자에서 값을 모두 초기화해서 변경 불가능한 클래스를 만들기 권장 
 */
@Getter
@ToString
// 값 타입을 정의하는 곳에 표시
@Embeddable
public class Address {
	private String city;
	private String street;
	private String zipcode;
	
	protected Address() {
	}
	
	public Address(String city, String street, String zipcode) {
		this.city = city;
		this.street = street;
		this.zipcode = zipcode;
	}
	
}

[com.oracle.oBootJpa03.form]

• MemberForm.java

Entity -> 테이블에 대한 속성(영구적)
화면(레이아웃)에 대한 유효성검사는 따로 클래스를 만드는 것이 좋다.(한정적)

package com.oracle.oBootJpa03.form;

import javax.validation.constraints.NotEmpty;

import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class MemberForm {
	@NotEmpty
	private String name;
	private String city;
	private String street;
	private String zipcode;
}

[templates.members]

• createMemberForm.html

<!DOCTYPE html>
<html xml:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<div class="container">
		<form role="fomr" action="/memberSave" th:object="${memberForm}" method="post">
			<div class="form-group">
				<label th:for="name">이름</label>
				<input type="text" th:field="*{name}" class="form-control" placeholder="이름을 입력하세요"
					   th:class="${#fields.hasErrors('name')}? 'form-control fieldError' : 'form-control'">
				<p th:if="${#fields.hasErrors('name')}" th:error="*{name}">Incorrect name</p>
			</div>
			<div class="form-group">
				<label th:for="city">도시</label>
				<input type="text" th:field="*{city}" class="form-control" placeholder="도시를 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="street">거리</label>
				<input type="text" th:field="*{street}" class="form-control" placeholder="거리를 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="zipcode">우편번호</label>
				<input  type="text" th:field="*{zipcode}" class="form-control" placeholder="우편번호를 입력하세요">
			</div>
			<button type="submit" class="btn btn-primary">Submit</button>
		</form>
	</div>
</body>
</html>

❌오류보고서

id가 계속 null 값으로 출력됨
-> 🤔이유 : pk인 id에 시퀀스가 생성❌
✍해결방법
-> Member 클래스에 시퀀스를 생성하고 @GeneratedValue 선언

package com.oracle.oBootJpa03.domain;

import java.util.ArrayList;
import java.util.List;

import javax.persistence.Column;
import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

import lombok.Getter;
import lombok.Setter;

@Entity
@Getter
@Setter
@SequenceGenerator(
		name = "member3_seq_gen",
		sequenceName = "member3_seq_generator",
		initialValue = 1,
		allocationSize = 1
		)
@Table(name = "member3")
public class Member {
	@Id
	@Column(name = "member_id")
	@GeneratedValue(strategy = GenerationType.SEQUENCE,
	generator = "member3_seq_gen")
	private Long id;
	private String name;
	
	@Embedded
	private Address address;
	
	// Order Entity의 member field에 의해서 mapper 당함 --> 읽기 전용
	@OneToMany(mappedBy = "member")
	private List<Order> orders = new ArrayList<>();
}

• HIBERNATE_SEQUENCE 삭제
  

---

📝회원목록

[templates.members]

• memberList.html

<!DOCTYPE html>
<html xml:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<div class="container">
		<table class="table table-striped" border="1">
			<thead>
				<tr>
				<th>#</th>
				<th>이름</th>
				<th>도시</th>
				<th>주소</th>
				<th>우편번호</th>
				</tr>
			</thead>
			<tbody>
			<!-- 타임리프에서 ?를 사용하면 null 을 무시 -->
				<tr th:each="member : ${members}">
				<td th:text="${member.id}"></td>
					<td th:text="${member.name}"></td>
					<td th:text="${member.address?.city}"></td>
					<td th:text="${member.address?.street}"></td>
					<td th:text="${member.address?.zipcode}"></td>
				</tr>
			</tbody>
		</table>
	</div>
</body>
</html>

[com.oracle.oBootJpa03.controller]

• MemberController.java

package com.oracle.oBootJpa03.controller;

import java.util.List;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

import com.oracle.oBootJpa03.domain.Address;
import com.oracle.oBootJpa03.domain.Member;
import com.oracle.oBootJpa03.form.MemberForm;
import com.oracle.oBootJpa03.service.MemberService;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;

@Controller
@Slf4j
@RequiredArgsConstructor
public class MemberController {
	
	private final MemberService memberService;
//	public MemberController(MemberService memberService) {
//		this.memberService = memberService;
//	}
	
	// 회원가입이동
	@GetMapping(value = "/members/new")
	public String createForm(Model model) {
		System.out.println("MemberController /members/new Start...");
		log.info("/members/new Start...");
		model.addAttribute("memberForm", new MemberForm());
		return "/members/createMemberForm";
	}
	
	// 회원저장
	@PostMapping(value = "/member/Save")
	public String memberSave(@Valid MemberForm form, BindingResult result) {
		System.out.println("MemberService memberSave Start...");
		if(result.hasErrors()) {
			return "members/createMemberForm";
		}
		Address address = new Address(form.getCity(), form.getStreet(), form.getZipcode());
		Member member = new Member();
		member.setName(form.getName());
		member.setAddress(address);
		memberService.memberSave(member);
		System.out.println("MemberController memberSave After");
		return "redirect:/";
	}
	
	// 전체회원목록
	@GetMapping(value = "/members")
	public String memberList(Model model) {
		log.info("members memberList...");
		List<Member> members = memberService.findMembers();
		model.addAttribute("members", members);
		return "members/memberList";
	}
}

[com.oracle.oBootJpa03.service]

• MemberService.java

package com.oracle.oBootJpa03.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.oracle.oBootJpa03.domain.Member;
import com.oracle.oBootJpa03.repository.MemberRepository;

@Service
@Transactional
public class MemberService {
	@Autowired
	private final MemberRepository memberRepository;
	// 생성자 Injection 많이 사용, 생성자가 하나면 생략 가능
	public MemberService(MemberRepository memberRepository) {
		this.memberRepository = memberRepository;
	}
	
	// 회원저장
	public Long memberSave(Member member) {
		System.out.println("MemberService memberSave Before...");
		memberRepository.memberSave(member);
		System.out.println("MemberService memberSave After member.getId()->"+member.getId());
		return member.getId();
	}
	
	// 전체회원목록
	public List<Member> findMembers() {
		System.out.println("MemberService findMembers Before");
		List<Member> listMember = memberRepository.findAll();
		System.out.println("MemberService findMembers After listMember.size()->"+listMember.size());
		return listMember;
	}
}

[com.oracle.oBootJpa03.repository]

• MemberRepository.java

package com.oracle.oBootJpa03.repository;

import java.util.List;

import javax.persistence.EntityManager;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.oracle.oBootJpa03.domain.Member;

@Repository
public class MemberRepository {
	private final EntityManager em;
	@Autowired
	public MemberRepository(EntityManager em) {
		this.em = em;
	}
	
	// 회원가입
	public void memberSave(Member member) {
		em.persist(member);
	}
	
	// 전체회원목록
	public List<Member> findAll() {
		System.out.println("MemberRepository findAll Start...");
		List<Member> memberList = em.createQuery("select m from Member m", Member.class)
									.getResultList();
		System.out.println("MemberRepository findAll After memberList.size()->"+memberList.size());
		return memberList;
	}
}

---

📌상품등록

[com.oracle.oBootJpa03.form]

• BookForm.java

package com.oracle.oBootJpa03.form;

import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class BookForm {
	private Long id;
	private String name;
	private int price;
	private int stockQuantity;
	private String author;
	private String isbn;
}

[templates.items]

• createItemForm.html

<!DOCTYPE html>
<html xml:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<div class="container">
		<form th:action="@{/items/save}" th:object="${form}" method="post">
			<div class="form-group">
				<label th:for="name">상품명</label>
				<input type="text" th:field="*{name}" class="form-contrl" placeholder="이름을 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="price">가격</label>
				<input type="number" th:field="*{price}" class="form-contrl" placeholder="가격을 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="stockQuantity">수량</label>
				<input type="number" th:field="*{stockQuantity}" class="form-contrl" placeholder="수량을 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="author">저지</label>
				<input type="text" th:field="*{author}" class="form-contrl" placeholder="저자를 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="isbn">ISBN</label>
				<input type="text" th:field="*{isbn}" class="form-contrl" placeholder="ISBN을 입력하세요">
			</div>
			<button type="submit" class="btn btn-primary">Submit</button>
		</form>
	</div>
</body>
</html>

[com.oracle.oBootJpa03.controller]

• ItemController.java

package com.oracle.oBootJpa03.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

import com.oracle.oBootJpa03.domain.item.Book;
import com.oracle.oBootJpa03.form.BookForm;
import com.oracle.oBootJpa03.service.ItemService;

import lombok.RequiredArgsConstructor;

@Controller
@RequiredArgsConstructor
public class ItemController {
	private final ItemService itemService;
	
	// 상품등록폼이동
	@GetMapping(value = "/items/new")
	public String createForm(Model model) {
		System.out.println("ItemController /items/new Start...");
		model.addAttribute("form", new BookForm());
		return "items/createItemForm";
	}
	
	// 상품등록
	@PostMapping(value = "/items/save")
	public String itemSave(BookForm form) {
		System.out.println("ItemController /items/save Start...");
		Book book = new Book();
		// 1. BookForm -> Book
		book.setId(form.getId());
		book.setName(form.getName());
		book.setAuthor(form.getAuthor());
		book.setIsbn(form.getIsbn());
		book.setPrice(form.getPrice());
		book.setStockQuantity(form.getStockQuantity());
		itemService.saveItem(book);
		return "redirect:/";
	}
}

[com.oracle.oBootJpa03.service]

• ItemService.java

package com.oracle.oBootJpa03.service;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.oracle.oBootJpa03.domain.item.Item;
import com.oracle.oBootJpa03.repository.ItemRepository;

import lombok.RequiredArgsConstructor;

@Service
@Transactional
@RequiredArgsConstructor
public class ItemService {
	private final ItemRepository itemRepository;
    
	// 상품등록
	public void saveItem(Item item) {
		System.out.println("ItemService saveItem Start...");
		itemRepository.itemSave(item);
		System.out.println("ItemService saveItem After...");
		
	}
	
	
}

[com.oracle.oBootJpa03.repository]

• ItemRepository.java

package com.oracle.oBootJpa03.repository;

import javax.persistence.EntityManager;

import org.springframework.stereotype.Repository;

import com.oracle.oBootJpa03.domain.item.Item;

import lombok.RequiredArgsConstructor;

@Repository
@RequiredArgsConstructor
public class ItemRepository {
	private final EntityManager em;
	
	// 상품등록
	public void itemSave(Item item) {
		em.persist(item);
	}
}

❌오류보고서2

😡시퀀스가 없어 id가 null로 출력

✍해결방법 : 시퀀스 create
-> @GeneratedValue 이렇게 하면 JPA에서 자동으로 시퀀스를 생성한다(HIBERNATE_SEQUENCE)

• item.java

package com.oracle.oBootJpa03.domain.item;

import javax.persistence.Column;
import javax.persistence.DiscriminatorColumn;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;

import lombok.Getter;
import lombok.Setter;

@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "dtype")
@Getter
@Setter
public abstract class Item {
	@Id
	@GeneratedValue
	@Column(name = "item_id")
	private Long id;
	
	private String name;
	private int price;
	private int stockQuantity;
}

---

🧐상품조회

[templates.items]

• itemList.html

<!DOCTYPE html>
<html xml:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<div class="container">
		<table class="table table-striped">
			<thead>
				<tr>
					<th>#</th>
					<th>상품명</th>
					<th>가격</th>
					<th>재고수량</th>
					<th></th>
				</tr>
			</thead>
			<tbody>
				<tr th:each="item : ${items}">
					<td th:text="${item.id}"></td>
					<td th:text="${item.name}"></td>
					<td th:text="${item.price}"></td>
					<td th:text="${item.stockQuantity}"></td>
					<td><a href="#" th:href="@{/items/{id}/edit (id=${item.id})}" class="btn btn-primary" role="button">수정</a></td>
				</tr>
			</tbody>
		</table>
	</div>
</body>
</html>

[com.oracle.oBootJpa03.controller]

• ItemController.java

package com.oracle.oBootJpa03.controller;

import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

import com.oracle.oBootJpa03.domain.item.Book;
import com.oracle.oBootJpa03.domain.item.Item;
import com.oracle.oBootJpa03.form.BookForm;
import com.oracle.oBootJpa03.service.ItemService;

import lombok.RequiredArgsConstructor;

@Controller
@RequiredArgsConstructor
public class ItemController {
	private final ItemService itemService;
	
	// 상품등록폼이동
	@GetMapping(value = "/items/new")
	public String createForm(Model model) {
		System.out.println("ItemController /items/new Start...");
		model.addAttribute("form", new BookForm());
		return "items/createItemForm";
	}
	
	// 상품등록
	@PostMapping(value = "/items/save")
	public String itemSave(BookForm form) {
		System.out.println("ItemController /items/save Start...");
		Book book = new Book();
		// 1. BookForm -> Book
		book.setId(form.getId());
		book.setName(form.getName());
		book.setAuthor(form.getAuthor());
		book.setIsbn(form.getIsbn());
		book.setPrice(form.getPrice());
		book.setStockQuantity(form.getStockQuantity());
		itemService.saveItem(book);
		return "redirect:/";
	}
	
	// 상품조회
	@GetMapping(value = "/items")
	public String itemList(Model model) {
		System.out.println("ItemController /items Start...");
		List<Item> items = itemService.findItems();
		model.addAttribute("items", items);
		return "items/itemList";
	}
}

[com.oracle.oBootJpa03.service]

• ItemService.java

package com.oracle.oBootJpa03.service;

import java.util.List;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.oracle.oBootJpa03.domain.item.Item;
import com.oracle.oBootJpa03.repository.ItemRepository;

import lombok.RequiredArgsConstructor;

@Service
@Transactional
@RequiredArgsConstructor
public class ItemService {
	private final ItemRepository itemRepository;

	public void saveItem(Item item) {
		System.out.println("ItemService saveItem Start...");
		itemRepository.itemSave(item);
		System.out.println("ItemService saveItem After...");
		
	}

	public List<Item> findItems() {
		System.out.println("ItemService findItems Start...");
		List<Item> itemList = itemRepository.findAll();
		System.out.println("ItemService findItems After itemList.size()->"+itemList.size());
		return itemList;
	}
}

[com.oracle.oBootJpa03.repository]

• ItemRepository.java

package com.oracle.oBootJpa03.repository;

import java.util.List;

import javax.persistence.EntityManager;

import org.springframework.stereotype.Repository;

import com.oracle.oBootJpa03.domain.item.Item;

import lombok.RequiredArgsConstructor;

@Repository
@RequiredArgsConstructor
public class ItemRepository {
	private final EntityManager em;
	
	// 상품등록
	public void itemSave(Item item) {
		System.out.println("ItemRepository itemSave Start...");
		em.persist(item);
	}

	public List<Item> findAll() {
		System.out.println("ItemRepository findAll Start...");
		List<Item> itemList = em.createQuery("select i from Item i",Item.class)
								.getResultList();
		System.out.println("ItemRepository itemList.size()->"+itemList.size());
		return itemList;
	}
}

---

✍상품수정

[templates.items]

• updateItemForm.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<div class="container">
		<form th:object="${form}" method="post">
			<input type="hidden" th:field="*{id}">
			<div class="form-group">
				<label th:for="name">상품명</label>
				<input type="text" th:field="*{name}" class="form-control" placeholder="이름을 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="price">가격</label>
				<input type="number" th:field="*{price}" class="form-control" placeholder="가격을 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="stockQuantity">수량</label>
				<input type="number" th:field="*{stockQuantity}" class="form-control" placeholder="수량을 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="author">저자</label>
				<input type="text" th:field="*{author}" class="form-control" placeholder="저자를 입력하세요">
			</div>
			<div class="form-group">
				<label th:for="isbn">ISBN</label>
				<input type="text" th:field="*{isbn}" class="form-control" placeholder="ISBN을 입력하세요">
			</div>
			<button type="submit" class="btn btn-primary">Submit</button>
		</form>
	</div>
</body>
</html>

[com.oracle.oBootJpa03.controller]

• ItemController.java

package com.oracle.oBootJpa03.controller;

import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import com.oracle.oBootJpa03.domain.item.Book;
import com.oracle.oBootJpa03.domain.item.Item;
import com.oracle.oBootJpa03.form.BookForm;
import com.oracle.oBootJpa03.service.ItemService;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;

@Slf4j
@Controller
@RequiredArgsConstructor
public class ItemController {
	private final ItemService itemService;
	
	// 상품등록폼이동
	@GetMapping(value = "/items/new")
	public String createForm(Model model) {
		System.out.println("ItemController /items/new Start...");
		model.addAttribute("form", new BookForm());
		return "items/createItemForm";
	}
	
	// 상품등록
	@PostMapping(value = "/items/save")
	public String itemSave(BookForm form) {
		System.out.println("ItemController /items/save Start...");
		Book book = new Book();
		// 1. BookForm -> Book
		book.setId(form.getId());
		book.setName(form.getName());
		book.setAuthor(form.getAuthor());
		book.setIsbn(form.getIsbn());
		book.setPrice(form.getPrice());
		book.setStockQuantity(form.getStockQuantity());
		itemService.saveItem(book);
		return "redirect:/";
	}
	
	// 상품조회
	@GetMapping(value = "/items")
	public String itemList(Model model) {
		System.out.println("ItemController /items Start...");
		List<Item> items = itemService.findItems();
		model.addAttribute("items", items);
		return "items/itemList";
	}
	
	// 상품수정폼이동
	@GetMapping(value = "/items/{itemId}/edit")
	public String updateItemForm(@PathVariable("itemId") Long itemId, Model model) {
		log.info("itemId->{}",itemId);
		Book item = (Book) itemService.findOne(itemId);
		BookForm form = new BookForm();
		form.setId(item.getId());
		form.setName(item.getName());
		form.setPrice(item.getPrice());
		form.setStockQuantity(item.getStockQuantity());
		form.setAuthor(item.getAuthor());
		form.setIsbn(item.getIsbn());
		model.addAttribute("form", form);
		return "items/updateItemForm";
	}
}

[com.oracle.oBootJpa03.service]

• ItemService.java

package com.oracle.oBootJpa03.service;

import java.util.List;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.oracle.oBootJpa03.domain.item.Item;
import com.oracle.oBootJpa03.repository.ItemRepository;

import lombok.RequiredArgsConstructor;

@Service
@Transactional
@RequiredArgsConstructor
public class ItemService {
	private final ItemRepository itemRepository;
	
	// 상품등록
	public void saveItem(Item item) {
		System.out.println("ItemService saveItem Start...");
		itemRepository.itemSave(item);
		System.out.println("ItemService saveItem After...");
		
	}
	
	// 상품조회
	public List<Item> findItems() {
		System.out.println("ItemService findItems Start...");
		List<Item> itemList = itemRepository.findAll();
		System.out.println("ItemService findItems After itemList.size()->"+itemList.size());
		return itemList;
	}
	
	// 상품수정폼이동
	public Item findOne(Long itemId) {
		System.out.println("ItemService findOne Start...");
		Item item = itemRepository.findOne(itemId);
		System.out.println("ItemService findOne After");
		return item;
	}
}

[com.oracle.oBootJpa03.repository]

• ItemRepository.java

package com.oracle.oBootJpa03.repository;

import java.util.List;

import javax.persistence.EntityManager;

import org.springframework.stereotype.Repository;

import com.oracle.oBootJpa03.domain.item.Item;

import lombok.RequiredArgsConstructor;

@Repository
@RequiredArgsConstructor
public class ItemRepository {
	private final EntityManager em;
	
	// 상품등록
	public void itemSave(Item item) {
		System.out.println("ItemRepository itemSave Start...");
		em.persist(item);
	}
	
	// 상품조회
	public List<Item> findAll() {
		System.out.println("ItemRepository findAll Start...");
		List<Item> itemList = em.createQuery("select i from Item i",Item.class)
								.getResultList();
		System.out.println("ItemRepository itemList.size()->"+itemList.size());
		return itemList;
	}
	
	// 상품수정폼이동
	public Item findOne(Long id) {
		System.out.println("ItemRepository findOne id->"+id);
		Item item = em.find(Item.class, id);
		System.out.println("ItemRepository findOne After");
		return item;
	}
}