[EDIT]:画面遷移ができなくなるエラー修正

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

@@ -1,96 +1,85 @@
 package com.example.demo.controller;
 
+import java.util.ArrayList;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
-import org.springframework.validation.BindingResult;
-import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 
 import com.example.demo.entity.BookInsert;
 import com.example.demo.repository.BookCategoryRepository;
-import com.example.demo.repository.BookInsertRepository;
 import com.example.demo.repository.StorageLocationRepository;
 import com.example.demo.repository.SubCategoryRepository;
 import com.example.demo.service.BookInsertService;
 
 @Controller
 public class BookInsertController {
+	
+@Autowired
+private BookInsertService bookInsertService;
 
-	@Autowired
-	private BookInsertService bookInsertService;
+@Autowired
+private BookCategoryRepository categoryRepository;
 
-	@Autowired
-	private BookCategoryRepository categoryRepository;
+@Autowired
+private SubCategoryRepository subCategoryRepository;
 
-	@Autowired
-	private SubCategoryRepository subCategoryRepository;
+@Autowired 
+private StorageLocationRepository storageLocationRepository;
 
-	@Autowired
-	private StorageLocationRepository storageLocationRepository;
+	    @GetMapping("/bookInsert")
+	    public String bookInsert(Model model) {
+	    	model.addAttribute("categoryList",categoryRepository.findAll());
+	    model.addAttribute("subCategoryList",subCategoryRepository.findAll());
+		model.addAttribute("locationList",storageLocationRepository.findAll());
+	    	model.addAttribute("bookInsert",new BookInsert());
+	        return "bookInsert";
+	    }
+	    
+	    // 初期表示: 空のformを渡す(th:fieldの初期値が空になる)
+	    
+	    // 確認画面から戻る: POSTされた入力中の値がformに入ったまま入力画面へ
+	    @PostMapping("/bookInsertConfirm")
+	    public String bookInsertConfirm(BookInsert bookInsert,Model model) {
+	    	System.out.println(bookInsert);
+	    	bookInsertService.save(bookInsert);
+	    	model.addAttribute("bookInsert",bookInsert);
+	        return "bookInsertConfirm";
+	    }
+	    
+	    @PostMapping("/bookInsert")
+	    public String bookInsertBack(BookInsert bookInsert,Model model) {
+	    	model.addAttribute("categoryList",categoryRepository.findAll());
+	    	model.addAttribute("subCategoryList",new ArrayList<>());
+	    	model.addAttribute("locationList",storageLocationRepository.findAll());
+	    	model.addAttribute("bookInsert",bookInsert);
+	        return "bookInsert";
+	    }
+	    
+	    @PostMapping("/bookInsert/category")
+	    public String changeCategory(BookInsert bookInsert,Model model) {
+	    	    //カテゴリプルダウンに表示するデータを取得
+	    		model.addAttribute("categoryList",categoryRepository.findAll());
 
-	@Autowired
-	private BookInsertRepository bookInsertRepository;
+	        model.addAttribute("subCategoryList",subCategoryRepository.findByBookCategory_BookCategoryId(bookInsert.getBookCategoryId()));
+	        model.addAttribute("locationList",storageLocationRepository.findAll());
+	        model.addAttribute("bookInsert", bookInsert);
 
-	@GetMapping("/bookInsert")
-	public String bookInsert(Model model) {
-		model.addAttribute("nextBookManageId", bookInsertService.createBookManageId());
-		model.addAttribute("bookInsert", new BookInsert());
-		model.addAttribute("categoryList", categoryRepository.findAll());
-		model.addAttribute("subCategoryList", subCategoryRepository.findAll());
-		model.addAttribute("locationList", storageLocationRepository.findAll());
-		model.addAttribute("bookInsert", new BookInsert());
-		return "bookInsert";
-	}
+	        return "bookInsert";
+	    }
+	    
+	    
+	
+	    }
 
-	// 初期表示: 空のformを渡す(th:fieldの初期値が空になる)
 
-	// 確認画面から戻る: POSTされた入力中の値がformに入ったまま入力画面へ
-	//入力内容確認してOKであれば確認画面へ
-	@PostMapping("/bookInsertConfirm")
-	public String bookInsertConfirm(@Validated BookInsert bookInsert, BindingResult result, Model model) {
-		if (result.hasErrors()) {
-			model.addAttribute("nextBookManageId", bookInsertService.createBookManageId());
-			model.addAttribute("categoryList", categoryRepository.findAll());
-			if (bookInsert.getBookCategoryId() != null) { //nullじゃなかったら
-				model.addAttribute("subCategoryList",
-						subCategoryRepository.findByBookCategory_BookCategoryId(bookInsert.getBookCategoryId()));
-				//そのカテゴリに属するサブカテゴリを持ってくる
-			} else {
-				model.addAttribute("subCategoryList", subCategoryRepository.findAll());
-			}
-			model.addAttribute("locationList",storageLocationRepository.findAll());
-			model.addAttribute("bookInsert", bookInsert);
-			return "bookInsert";
-
-		}
-		bookInsertService.save(bookInsert);
-		model.addAttribute("bookInsert", bookInsert);
-		return "bookInsertConfirm";
-	}
-
-	@PostMapping("/bookInsert/category")
-	public String changeCategory(BookInsert bookInsert, Model model) {
-		//カテゴリプルダウンに表示するデータを取得
-		model.addAttribute("nextBookManageId", bookInsertService.createBookManageId());
-		model.addAttribute("categoryList", categoryRepository.findAll());
-		if (bookInsert.getBookCategoryId() != null) { //nullじゃなかったら
-			model.addAttribute("subCategoryList",
-					subCategoryRepository.findByBookCategory_BookCategoryId(bookInsert.getBookCategoryId()));
-			//そのカテゴリに属するサブカテゴリを持ってくる
-		} else {
-			model.addAttribute("subCategoryList", subCategoryRepository.findAll());
-		}
-		model.addAttribute("locationList", storageLocationRepository.findAll());
-		model.addAttribute("bookInsert", bookInsert);
-
-		return "bookInsert";
-	}
-
-}
-
-//画面で選択したカテゴリbookInsert.getBookCategoryId()に選択した結果をいれる
-//subCategoryRepository.findBookCategory_BookCategoryId(bookInsert.getBookCategoryId(1)));
-//「カテゴリIDが1のサブカテゴリを取ってくる」
-//model.addAttribute("subCategoryList",取得結果)
+	//画面で選択したカテゴリbookInsert.getBookCategoryId()に選択した結果をいれる
+	//subCategoryRepository.findBookCategory_BookCategoryId(bookInsert.getBookCategoryId(1)));
+	//「カテゴリIDが1のサブカテゴリを取ってくる」
+	//model.addAttribute("subCategoryList",取得結果)
+	    
+	  
+	   
+	 

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

@@ -3,13 +3,20 @@ package com.example.demo.controller;
 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 lombok.RequiredArgsConstructor;
 
 @Controller
+@RequiredArgsConstructor
 public class BookLendController {
+	
+	@Autowired
+	private final BookServiceImpl bookServiceImpl;
 
 	@Autowired
 	private EmployeeRepository employeeRepository;
@@ -19,12 +26,13 @@ public class BookLendController {
 		return "bookLend";
 	}
 	
-	// 社員IDを取得してプルダウンに表示させる
-	@PostMapping("/bookLend/employeeId")
-	public String selectEmployeeId(Employee employee, Model model) {
-		model.addAttribute("employeeList", employeeRepository.findByEmployeeId(employee.getEmployeeId()));
-		model.addAttribute("bookLend", employee);
+	@PostMapping("/bookLend/{id}")
+	public String bookLend(@PathVariable int id, Model model) {
+		System.out.println(id);
+		model.addAttribute("book", bookServiceImpl.findById(id));
 		return "bookLend";
 	}
+	
+	
 
 }

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

@@ -1,11 +1,8 @@
 package com.example.demo.controller;
 
-import java.util.List;
-
 import jakarta.servlet.http.HttpSession;
 import jakarta.validation.Valid;
 
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.validation.BindingResult;
@@ -14,9 +11,7 @@ import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PostMapping;
 
 import com.example.demo.entity.AccountEntity;
-import com.example.demo.entity.Employee;
 import com.example.demo.form.LoginForm;
-import com.example.demo.repository.EmployeeRepository;
 import com.example.demo.service.LoginService;
 
 import lombok.RequiredArgsConstructor;
@@ -26,20 +21,12 @@ import lombok.RequiredArgsConstructor;
 public class LoginController {
 
 	private final LoginService loginService;
-	@Autowired
-	private EmployeeRepository employeeRepository;
-
 
 	// Boot起動直後にログイン画面に移動する用のメソッド
 	@GetMapping("/")
-	public String index(Model model,HttpSession session) {
+	public String index(HttpSession session) {
 		if (session.getAttribute("loginEmployee") != null) {
-			if(session.getAttribute("EmployeeId") != null) {
-				
-				List<Employee> emrp = employeeRepository.findByEmployeeId((Integer)session.getAttribute("EmployeeId") );
-				model.addAttribute("LoginName",emrp.getFirst().getEmployeeName());
-			}
-				return "topmenu";
+			return "redirect:/topmenu";
 		}
 		return "redirect:/login";
 	}
@@ -47,12 +34,7 @@ public class LoginController {
 	@GetMapping("/login")
 	public String loginForm(Model model, HttpSession session) {
 		if (session.getAttribute("loginEmployee") != null) {
-			if(session.getAttribute("EmployeeId") != null) {
-				
-				List<Employee> emrp = employeeRepository.findByEmployeeId((Integer)session.getAttribute("EmployeeId") );
-				model.addAttribute("LoginName",emrp.getFirst().getEmployeeName());
-			}
-			return "topmenu";
+			return "redirect:/topmenu";
 		}
 
 		model.addAttribute("loginForm", new LoginForm());
@@ -79,13 +61,7 @@ public class LoginController {
 		}
 
 		session.setAttribute("loginEmployee", accountEntity);
-		
-		List<Employee> emrp = employeeRepository.findByEmployeeId(accountEntity.getEmployee().getEmployeeId());
-		model.addAttribute("LoginName",emrp.getFirst().getEmployeeName());
-		session.setAttribute("EmployeeId", accountEntity.getEmployee().getEmployeeId());
-		
-
-		return "topmenu";
+		return "redirect:/topmenu";
 	}
 	
 	// ログアウト処理
@@ -97,13 +73,7 @@ public class LoginController {
 
 	// 各画面からトップメニューへの遷移用
 	@GetMapping("/topmenu")
-	public String showTopMenu(Model model,HttpSession session) {
-		
-		if(session.getAttribute("EmployeeId") != null) {
-			
-			List<Employee> emrp = employeeRepository.findByEmployeeId((Integer)session.getAttribute("EmployeeId") );
-			model.addAttribute("LoginName",emrp.getFirst().getEmployeeName());
-		}
+	public String showTopMenu() {
 		return "topmenu";
 	}
 }

src/main/java/com/example/demo/entity/BookInsert.java

@@ -8,7 +8,6 @@ import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
 import jakarta.persistence.Table;
 import jakarta.persistence.Transient;
-import jakarta.validation.constraints.Pattern;
 
 import lombok.Data;
 
@@ -28,7 +27,6 @@ public class BookInsert {
     @Column(name = "title")
     private String title;
     
-    @Pattern(regexp = "^(?=(?:.*-){4})[0-9-]{17}$",message = "ISBNは半角数字(13文字)とハイフン(4つ)を含めて入力してください")
     @Column(name = "isbn")
     private String isbn;
     
@@ -68,7 +66,7 @@ public class BookInsert {
     @Column(name = "book_approval")
     private Integer bookApproval;
   
-    @Transient 
+    @Transient //DB保存無効
     private Integer bookCategoryId;
     
     

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

@@ -3,13 +3,9 @@ package com.example.demo.repository;
 
 
 import org.springframework.data.jpa.repository.JpaRepository;
-import org.springframework.stereotype.Repository;
 
 import com.example.demo.entity.BookInsert;
 
-@Repository
 public interface BookInsertRepository extends JpaRepository<BookInsert,Integer> {
 
-	BookInsert findFirstByOrderByBookIdDesc();//bookIDが一番大きいデータを取得
-
-	}
+}

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

@@ -8,5 +8,4 @@ public interface BookInsertService {
 	String regist(BookInsert book);
 	List<BookInsert> findAll();
 	void save(BookInsert bookInsert);
-	String createBookManageId(); 
-	}
+}

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

@@ -12,17 +12,9 @@ import com.example.demo.repository.BookInsertRepository;
 	@Service
 	public class BookInsertServiceImpl implements BookInsertService {
 	
-	@Autowired
-	private BookInsertRepository bookInsertRepository;
+	    @Autowired
+	    private BookInsertRepository bookInsertRepository;
 	
-	@Override
-	public String createBookManageId() { //次に表示する図書管理IDを作る
-	    		BookInsert book =bookInsertRepository.findFirstByOrderByBookIdDesc();
-	    			if(book ==null){
-	                return "BK-1";}
-	    			return "BK-"+(book.getBookId()+1); //いまのIDの次のIDを返す
-	    }
-	    
 	    @Override
 	    public String regist(BookInsert book) {
 	        // DTO → エンティティへ詰め替えて保存
@@ -41,14 +33,15 @@ import com.example.demo.repository.BookInsertRepository;
 	    	bookInsert.setIsDeleted(0);//削除フラグ設定
 	    	bookInsert.setBookApproval(0);//承認フラグ(承認されていないため0)
 	    	bookInsertRepository.save(bookInsert);
-	    	//BK-〇形式で管理IDを作る
-	    	String manageId="BK-"+bookInsert.getBookId();//BookId取得→BK形式に変換
+	    	//BK〇〇〇〇形式で管理IDを作る
+	    	String manageId="BK-" + bookInsert.getBookId();//BookId取得→BK形式に変換
 	    	bookInsert.setBookManageId(manageId);
 	    
 	     bookInsertRepository.save(bookInsert);//データベースに保存
 	    }
-	    }
+	}
+	
+	
 	
 	// ※BookService インタフェースにも List<Review> findAll(); を追加すること
 	
-	

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

@@ -15,7 +15,7 @@ public class BookLendService {
 	private BookLendRepository bookLendRepository;
 
 	public List<BookLend> findAll() {
-		return bookLendRepository.findBybookStatus(1);
+		return bookLendRepository.findAll();
 	}
 
 }

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
@@ -17,9 +23,19 @@ public class BookServiceImpl {
 	public List<Book> findAll() {
 		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/java/com/example/demo/service/EmployeeService.java

@@ -0,0 +1,24 @@
+package com.example.demo.service;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.example.demo.entity.Employee;
+import com.example.demo.repository.EmployeeRepository;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class EmployeeService {
+
+	@Autowired
+	private EmployeeRepository employeeRepository;
+	
+	public List<Employee> findAll() {
+		return employeeRepository.findAll();
+	}
+	
+}

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

src/main/resources/templates/bookInsert.html

@@ -8,33 +8,26 @@
 
 <body>
 	<h1>新規図書登録入力</h1>
-	       <br>
-	<h4>新しく図書を登録します。必要事項を入力し、「登録」ボタンを押してください。</h4>
+	       <br><br>
+	<h4>新しく図書を登録します。必要事項を入力し、「登録」ボタンを押してください</h4>
 	<span style="color:red;">※は必須項目です</span>
-	<br>
-	<h4>図書情報</h4>
+	<br><br>
 	<form action="/bookInsertConfirm" method="POST" th:object="${bookInsert}">
  
 		
 		<label for="bookmanageId">図書管理ID</label><br>
-				<input type="text" id="bookManageId" th:value="${nextBookManageId}" readonly>
-				<div style="font-size:12px; color:rgb(128, 128, 128);">
-				※例：BK-1、BK-2...
-				</div>
-				<br>
+				<input type="text"
+				       id="bookManageId"
+				       placeholder="登録時に自動採番されます" readonly>
+				<br><br>
 
 	<label for="title">タイトル<span style="color:red;">※</span></label><br>
 	<input type="text" id="title" name="title" placeholder="タイトルを入力" th:value="${bookInsert.title}" required>
 	<br><br>
 	
 	<label for="isbn">ISBN<span style="color:red;">※</span></label><br>
-	<input type="text" id="isbn" name="isbn" placeholder="例：978-4-123-45678-9" th:value="${bookInsert.isbn}"  required>
-	<div style="font-size:12px; color:rgb(128, 128, 128);">
-	※ハイフン(4つ)を含む形式で入力してください
-	</div>
-	<div th:if="${#fields.hasErrors('isbn')}" th:errors="*{isbn}" style="color:red">
-		   </div>
-		<br>
+	<input type="text" id="isbn" name="isbn" placeholder="例:978-1-23-456789-0" th:value="${bookInsert.isbn}" required>
+		<br><br>
 	
 		<label for="title">著者名<span style="color:red;">※</span></label><br>
 		<input type="text" id="author" name="author" placeholder="著者名を入力" th:value="${bookInsert.author}" required>
@@ -55,34 +48,30 @@
 		<br><br>
 		
 		<label for="subcategory">サブカテゴリ<span style="color:red;">※</span></label><br>
-		<select th:field="*{subcategory}"  required>
+		<select th:field="*{subcategory}">
 		    <option value="">選択してください</option>
 			<option th:each="sub:${subCategoryList}"
 				    th:value="${sub.bookSubcategoryId}"
-				    th:text="${sub.bookSubcategoryName}">
+				    th:text="${sub.bookSubcategoryName}" required>
 				    </option>
 				</select>
-				<div th:if="${#fields.hasErrors('subcategory')}" th:errors="*{subcategory}" style="color:red">
-						</div>
 		<br><br>
 		
 		<label for="location">保管場所<span style="color:red;">※</span></label><br>
-		<select th:field="*{location}" required>
+		<select th:field="*{location}">
 		<option value="">選択してください</option>
 			<option th:each="location:${locationList}"
 		            th:value="${location.locationId}"
-		            th:text="${location.locationName}" >
+		            th:text="${location.locationName}" required>
 		    </option>
 
 		</select>
-		<div th:if="${#fields.hasErrors('location')}" th:errors="*{location}" style="color:red">
-		</div>
 		<br><br>
 		
 		<label for="condition">図書状態<span style="color:red;">※</span></label><br>
-		<select th:field="*{condition}" required>
+		<select name="condition" required>
 			<option value="">選択してください</option>
-		    <option value="1">新品</option>
+		    <option value="1">新品同様</option>
 		    <option value="2">良好</option>
 		    <option value="3">使用感あり</option>
 		    <option value="4">傷みあり</option>
@@ -107,9 +96,11 @@
 		<br><br>
 </label>-->
 
-<input type="submit" value="登録" onclick="return confirm('この内容で登録しますか？');">
 
+	<input type="submit" value="登録" class="btn">
 </form>
+
+
 </body>
 
 </html>

src/main/resources/templates/bookInsertConfirm.html

@@ -9,6 +9,30 @@
 <body>
 	<h1>登録内容確認</h1>
 
+		
+		<!-- もどる: 入力中の値を持って入力画面へ -->
+		<form method="post" th:action="@{/bookInsert}" >
+		    <input type="hidden" name="bookId" th:value="${bookInsert.bookId}">
+			<input type="hidden" name="bookmanageId" th:value="${bookInsert.bookManageId}">
+		    <input type="hidden" name="title" th:value="${bookInsert.title}">
+			<input type="hidden" name="isbn" th:value="${bookInsert.isbn}">
+			<input type="hidden" name="author" th:value="${bookInsert.author}">
+			<input type="hidden" name="category" th:value="${bookInsert.bookCategoryId}">
+			<input type="hidden" name="subcategory" th:value="${bookInsert.subcategory}">
+			<input type="hidden" name="publisher" th:value="${bookInsert.publisher}">
+			<input type="hidden" name="publicationDate" th:value="${bookInsert.publicationDate}">
+			<input type="hidden" name="location" th:value="${bookInsert.location}">
+			<input type="hidden" name="condition" th:value="${bookInsert.condition}">
+			<input type="hidden" name="donor" th:value="${bookInsert.donor}">
+			<input type="hidden" name="description" th:value="${bookInsert.description}">
+		    <button type="submit">もどる</button>
+		</form>
+	</form>
+	<!-- 完了 -->
+	<form action="/book" method="GET">
+		<input type="submit" value="完了" class="btn">
+	</form>
+	<div id="registerModal" class="modal-overlay">
 
 		<div class="modal">
 

src/main/resources/templates/bookLend.html

@@ -13,181 +13,109 @@
 	</h1>
 
 	<p>
-		以下の図書を貸出します。貸出先と貸出日・返却予定日を入力してください。
+		以下の図書を貸出します。貸出先の社員IDと返却予定日を入力してください。
 	</p>
 
 	<h2>
 		図書情報
 	</h2>
 
-	<div class="card-body">
-		<table class="info-table">
-			<tr>
-				<th>
-					図書管理ID
-				</th>
+	<form id="lendForm" action="bookLendConfirm" method="post">
 
-				<td>
-					（図書管理IDをここに表示させる）
-				</td>
-			</tr>
+		<div class="card-body">
+			<table class="info-table">
+				<thead>
+					<tr>
+						<th>図書管理ID</th>
+						<th>図書タイトル</th>
+						<th>著者名</th>
+						<th>ISBN</th>
+					</tr>
+				</thead>
 
-			<tr>
-				<th>
-					図書タイトル
-				</th>
+				<tbody>
+					<tr th:each="book : ${book}">
+						<td th:hidden="*{book.bookId}"></td>
+						<td th:text="*{book.bookManageId}"></td>
+						<td th:text="*{book.title}"></td>
+						<td th:text="*{book.author}"></td>
+						<td th:text="*{book.isbn}"></td>
+					</tr>
 
-				<td>
-					（タイトルをここに表示させる）
-				</td>
-			</tr>
+				</tbody>
 
-			<tr>
-				<th>
-					著者名
-				</th>
-
-				<td>
-					（著者名をここに表示させる）
-				</td>
-			</tr>
-
-			<tr>
-				<th>
-					ISBN
-				</th>
-
-				<td>
-					（ISBNをここに表示させる）
-				</td>
-			</tr>
-		</table>
-	</div>
-
-	<h2>
-		社員情報
-	</h2>
-
-	<div class="card">
-
-		<div class="form-row">
-
-			<label for="employeeSelect">
-				社員ID
-			</label>
-
-<!--			<select th:field="*{employeeId}" onchange="this.form.action='/bookLend/employeeId';this.form.submit();">-->
-
-			<select name="employeeId" id="employeeSelect">
-				
-				<option value="">
-					社員IDを選択してください
-				</option>
-
-<!--				<option th:each="employee : ${employeeList}" th:value="${employee.employeeId}">-->
-<!--				</option>-->
-
-				<option value="1">1</option>
-				<option value="2">2</option>
-				<option value="3">3</option>
-				<option value="4">4</option>
-				
-			</select>
+			</table>
 		</div>
 
-		<div class="form-row">
-			<label for="employeeName">
-				社員名
-			</label>
+		<h2>
+			社員情報
+		</h2>
 
-			<input type="text" id="employeeName" value="" placeholder="社員名が表示されます" readonly>
+		<div class="card">
 
-		</div>
+			<div class="form-row">
 
-	</div>
+				<label for="employeeSelect">
+					社員ID
+				</label>
 
-	<h2>
-		貸出・返却日入力
-	</h2>
+				<input type="text" id="employeeId" placeholder="社員IDを入力してください">
 
-	<div class="date-section">
-
-		<div class="date-box">
-
-			<label>
-				貸出日(自動取得)
-			</label>
-
-			<input type="date" id="loanDate" name="loanDate" value="">
-
-			<div class="note">
-				※ 現在の日付が自動で設定されます。
+				</select>
 			</div>
 
 		</div>
 
-		<div class="date-box">
+		<h2>
+			貸出・返却日入力
+		</h2>
 
-			<label>
-				貸出期間日数
-			</label>
+		<div class="date-section">
 
-			<input type="text" id="loanDays" placeholder="日数を入力してください">
+			<div class="date-box">
+
+				<label>
+					貸出日（現在の日付が自動で設定されます。)
+				</label>
+
+				<p th:text="${#calendars.format(#calendars.createNowForTimeZone('Asia/Tokyo'), 
+				'yyyy年MM月dd日')}">
+				</p>
+
+			</div>
+
+			<div class="date-box">
+
+				<label>
+					返却予定日（必ず指定してください。）
+				</label>
+
+				<input type="date" id="returnDate" name="returnDate">
+
+				<div class="note">
+					※ カレンダーから日付を選択してください。
+				</div>
+
+				<div class="error">
+					※ 現在の日付より前は選択できません。
+				</div>
 
-			<div class="note">
-				※ 数値（1以上）で入力してください。
 			</div>
 
 		</div>
 
-		<div class="date-box">
-
-			<label>
-				返却予定日（必須）
-			</label>
-
-			<input type="date" id="returnDate" name="returnDate">
-
-			<div class="note">
-				※ カレンダーから日付を選択してください。
-			</div>
-
-			<div class="error">
-				※ 現在の日付より前は選択できません。
-			</div>
-
-		</div>
-
-	</div>
-
-	<div class="warning-area">
-
-		<strong>
+		<h3>
 			注意事項
-		</strong>
+		</h3>
 
-		<ul>
-			<li>
-				貸出処理を行うと、対象の図書のステータスが「貸出中」に変更されます。
-			</li>
+		<p>
+			貸出処理を行うと、対象の図書のステータスが「貸出中」に変更されます。
+		</p>
 
-			<li>
-				返却予定日を必ず指定してください。
-			</li>
-		</ul>
+		<input type="submit" name="submit" onclick="submitLend()" value="貸出する">
+<!--		<button type="button" class="btn btn-primary" onclick="submitLend()">-->
 
-	</div>
-
-	<form id="lendForm" action="bookLendConfirmation" method="post">
-		<div class="button-area">
-
-			<div class="right-buttons">
-				<button type="button" class="btn btn-primary" onclick="submitLend()">
-					貸出する
-				</button>
-			</div>
-
-		</div>
+		<input type="reset" name="reset" value="入力内容をクリア">
 
 	</form>
 
@@ -201,6 +129,19 @@
 			}
 		}
 
+		// カレンダーを当日以前の日付を入力できないようにする
+		const today = new Date();
+		function dateFormat(today, format) {
+			format = format.replace("YYYY", today.getFullYear());
+			format = format.replace("MM", ("0" + (today.getMonth() + 1)).slice(-2));
+			format = format.replace("DD", ("0" + today.getDate()).slice(-2));
+			return format;
+		}
+
+		const data = dateFormat(today, 'YYYY-MM-DD');
+		const field = document.getElementById('returnDate');
+		field.setAttribute("min", data);
+
 	</script>
 
 </body>

src/main/resources/templates/topmenu.html

@@ -1,6 +1,6 @@
 <!DOCTYPE html>
-<html xmlns:th="http://www.thymeleaf.org">
-	
+<html>
+
 <head>
 	<meta charset="UTF-8">
 	<title>トップメニュー</title>
@@ -17,7 +17,7 @@
 		<div class="header-right">
 
 			<span class="user">
-				<h1 th:text="${LoginName}"></h1>
+				テストユーザー（一般）
 			</span>
 
 			<a class="button-link" th:href="@{/logout}">
@@ -61,17 +61,15 @@
 	<hr>
 
 	<!-- ===== 管理者のみ ===== -->
-	<th th:if="${session.loginEmployee.adminFlag == 1}">		
 
-		<a class="card" href="/bookInsert">
+	<a class="card" href="/bookInsert">
 
-			<h3>新規図書登録</h3>
+		<h3>新規図書登録</h3>
 
 		<p>
 			図書の登録申請を<br> 行います。
 		</p>
 	</a>
-	
 
 	<hr>
 
@@ -105,12 +103,7 @@
 			初期パスワードを<br> 変更します。
 		</p>
 	</a>
-	</th>
 
 </body>
 
-<script>
-  var admin =getElementByID
-</script>
-
 </html>