[EDIT]:図書一覧画面から貸出処理画面に遷移後、図書情報を引き継ぐ処理を追加

src/main/java/com/example/demo/controller/BookLendController.java

@@ -1,21 +1,59 @@
 package com.example.demo.controller;
 
+import java.util.List;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 
 import com.example.demo.entity.Employee;
 import com.example.demo.repository.EmployeeRepository;
+import com.example.demo.service.BookServiceImpl;
+import com.example.demo.service.EmployeeService;
+
+import lombok.RequiredArgsConstructor;
 
 @Controller
+@RequiredArgsConstructor
 public class BookLendController {
 	
+	@Autowired
+	private final BookServiceImpl bookServiceImpl;
+
 	@Autowired
 	private EmployeeRepository employeeRepository;
 	
-	@PostMapping("/bookLend")
-	public String bookLend(Model model) {
+	@Autowired
+	private EmployeeService employeeService;
+
+//	@PostMapping("/bookLend")
+//	public String bookLend(Model model) {
+//		return "bookLend";
+//	}
+	
+//	@PostMapping("/bookLend/{id}")
+//	public String bookLend(@PathVariable int id, Model model) {
+//		System.out.println(id);
+//		model.addAttribute("book", bookServiceImpl.findById(id));
+//		return "bookLend";
+//	}
+	
+	@PostMapping("/bookLend/{id}")
+	public String bookLend(@PathVariable int id,Employee employee, Model model) {
+		
+		// 図書ID取得
+		model.addAttribute("book", bookServiceImpl.findById(id));
+		
+		// 社員ID取得（プルダウン用）
+		List<Employee> empList = employeeService.findAll();
+
+		model.addAttribute("bookLend", employeeService.findAll());
+		
+//		model.addAttribute("employeeList", employeeRepository.findByEmployeeId(employee.getEmployeeId()));
+//		model.addAttribute("bookLend", employee);
+		
 		return "bookLend";
 	}
 

src/main/java/com/example/demo/repository/BookLendRepository.java

@@ -1,5 +1,7 @@
 package com.example.demo.repository;
 
+import java.util.List;
+
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
@@ -8,4 +10,6 @@ import com.example.demo.entity.BookLend;
 @Repository
 public interface BookLendRepository extends JpaRepository<BookLend, Integer> {
 
+	List<BookLend> findBybookStatus(Integer bookStatus);
+	
 }

src/main/java/com/example/demo/service/BookServiceImpl.java

@@ -1,14 +1,20 @@
 package com.example.demo.service;
 
 import java.util.List;
+import java.util.Optional;
 
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
+import org.springframework.web.server.ResponseStatusException;
 
 import com.example.demo.entity.Book;
 import com.example.demo.repository.BookRepository;
 
+import lombok.RequiredArgsConstructor;
+
 @Service
+@RequiredArgsConstructor
 public class BookServiceImpl {
 
 	@Autowired
@@ -18,8 +24,18 @@ public class BookServiceImpl {
 		return bookRepository.findAll();
 	}
 
-	public List<Book> findBooks(String keyword){ 
+	public List<Book> findBooks(String keyword) {
 		return bookRepository.searchBooks(keyword);
 	}
 
+	public Book findById(int bookId) {
+		Optional<Book> book = bookRepository.findById(bookId);
+		if (book.isEmpty()) {
+			throw new ResponseStatusException(
+					HttpStatus.NOT_FOUND, "図書情報が見つかりません");
+		}
+
+		return book.get();
+	}
+
 }

src/main/resources/templates/book.html

@@ -80,6 +80,7 @@
 				<tbody>
 					<tr th:each="book : ${book}" th:if="${book.bookManageId != null}">
 
+						<td th:hidden="*{book.bookId}"></td>
 						<td th:text="*{book.bookManageId}"></td>
 						<td th:text="*{book.isbn}"></td>
 						<td th:text="*{book.title}"></td>
@@ -106,8 +107,8 @@
 						
 						<td th:if="${session.loginEmployee.adminFlag == 1}">
 							
-							<form method="post" action="/bookLend">
-								<input type="hidden" name="bookManageId" th:value="*{book.bookManageId}">
+							<form method="post" th:action="@{/bookLend/{id}(id=${book.bookId})}">
+								<input type="hidden" name="id" th:value="*{book.bookId}">
 								<button type="submit"
 									th:disabled="*{book.bookLends != null && book.bookLends.bookStatus == 1}">
 									貸出