[EDIT]:図書一覧画面へ遷移できなくなっていた不具合を修正

# Conflicts:
#	src/main/resources/templates/book.html
#	src/main/resources/templates/topmenu.html

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

@@ -9,6 +9,7 @@ import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToOne;
 import jakarta.persistence.Table;
 
 import lombok.Data;
@@ -88,4 +89,7 @@ public class Book {
 	@Column(name = "book_approval", nullable = false)
 	private Integer bookApproval;
 	
+	@OneToOne(mappedBy = "book")
+	private BookLend bookLends;
+	
 }

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

@@ -7,6 +7,8 @@ import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.OneToOne;
 import jakarta.persistence.Table;
 
 import lombok.Data;
@@ -22,8 +24,9 @@ public class BookLend {
 	private int lendId;
 
 	// 図書管理ID（BK-1など）
-	@Column(name = "book_manage_id", nullable = false)
-	private String bookManageId;
+	@OneToOne
+	@JoinColumn(name = "book_manage_id", referencedColumnName = "book_manage_id",nullable = false)
+	private Book book;
 
 	// 図書管理ID（BK-1など）
 	@Column(name = "employee_id", nullable = false)

src/main/resources/templates/book.html

@@ -1,25 +1,100 @@
 <!DOCTYPE html>
-<html>
+
+<html xmlns:th="http://www.thymeleaf.org">
+
 <head>
 	<meta charset="UTF-8">
 	<title>社内図書一覧</title>
 </head>
+
 <body>
-	<form method="post" action="bookLend">
+	<div class="container">
+		<h1>社内図書一覧</h1>
+		<div class="float-end">
+		</div>
+		<form method="get" action="bookLend">
+
+			<table class="table table-striped">
+				<thead>
+					<tr>
+						<th>図書ID</th>
+						<th>ISBN</th>
+						<th>タイトル</th>
+						<th>著者名</th>
+						<th>出版社</th>
+						<th>出版日</th>
+						<th>カテゴリー名</th>
+						<th>サブカテゴリー名</th>
+						<th>保管場所</th>
+						<th>本の状態</th>
+						<th>登録日時</th>
+						<th>更新日時</th>
+						<th>寄贈者</th>
+						<th>貸出状態??</th>
+						<th>操作??</th>
+					</tr>
+				</thead>
+
+				<tbody>
+					<tr th:each="book : ${book}">
+						
+						<td th:text="*{book.bookManageId}"></td>
+						<td th:text="*{book.isbn}"></td>
+						<td th:text="*{book.title}"></td>
+						<td th:text="*{book.author}"></td>
+						<td th:text="*{book.publisher}"></td>
+						<td th:text="*{book.publicationDate}"></td>
+						<td th:text="*{book.bookSubcategory.bookCategory.bookCategoryName}"></td>
+						<td th:text="*{book.bookSubcategory.bookSubcategoryName}"></td>
+						<td th:text="*{book.storageLocation.locationName}"></td>
+						<td th:text="*{book.condition}"></td>
+						<td th:text="*{book.createdAt}"></td>
+						<td th:text="*{book.updatedAt}"></td>
+						<td th:text="*{book.employee != null ? book.employee.employeeId : '-'}"></td>
+						<td th:text="*{book.bookLends != null ? book.bookLends.bookStatus : '-'}"></td>
+						
+						
+						
+					</tr>
+				</tbody>
+			</table>
 
 
 			<button type="submit" class="btn-login">
-	                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M15 3h4a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-4"/><polyline points="10 17 15 12 10 7"/><line x1="15" y1="12" x2="3" y2="12"/></svg>
+				<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
+					stroke-linejoin="round">
+					<path d="M15 3h4a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-4" />
+					<polyline points="10 17 15 12 10 7" />
+					<line x1="15" y1="12" x2="3" y2="12" />
+				</svg>
+				貸出
+			</button>
+		</form>
+
+		<button type="submit" class="btn-login">
+			<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
+				stroke-linejoin="round">
+				<path d="M15 3h4a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-4" />
+				<polyline points="10 17 15 12 10 7" />
+				<line x1="15" y1="12" x2="3" y2="12" />
+			</svg>
 			貸出
 		</button>
 		</form>
 
 		<form method="post" action="update">
 			<button type="submit" class="btn-login">
-						  <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M15 3h4a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-4"/><polyline points="10 17 15 12 10 7"/><line x1="15" y1="12" x2="3" y2="12"/></svg>
+				<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
+					stroke-linejoin="round">
+					<path d="M15 3h4a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-4" />
+					<polyline points="10 17 15 12 10 7" />
+					<line x1="15" y1="12" x2="3" y2="12" />
+				</svg>
 				更新
 			</button>
 		</form>
 
+
 </body>
+
 </html>

src/main/resources/templates/topmenu.html

@@ -35,17 +35,16 @@
 
 
 	<!-- ===== 共通：社内図書一覧 ===== -->
-	<form method="post" name="社内図書一覧" action="book">
-		<a href="javascript:form1.submit()">リンク名</a>
-		<button type="submit" class="btn-book">
+
+	<a class="card" href="/book">
 
 		<h3>社内図書一覧</h3>
 
 		<p>
 			登録されている図書の<br> 一覧を表示します。
 		</p>
-		</button>
-	</form>
+	</a>
+
 	<hr> <!--区切り線-->
 
 	<!-- ===== 共通：寄贈申請 ===== -->