[add] 新規図書登録画面→登録確認画面作成

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

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+package com.example.demo.controller;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class BookInsertConfirmController {
+	@GetMapping("/bookInsertConfirm")
+	public String bookInsertConfirm() {
+		return "bookInsertConfirm";
+		
+	}
+
+}

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

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+package com.example.demo.controller;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class BookInsertController {
+	@GetMapping("bookInsert")
+		public String bookInsert() {
+			return "bookInsert";
+		
+	}
+}

src/main/resources/templates/bookInsert.html

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+<!DOCTYPE html>
+<html>
+
+<head>
+	<meta charset="UTF-8">
+	<title>新規図書登録</title>
+</head>
+
+<body>
+	<h1>新規図書登録入力</h1>
+	<form action="/bookInsertConfirm" method="GET">
+	<input type="submit" value="確認画面へ" class="btn">
+</body>
+
+</html>

src/main/resources/templates/bookInsertConfirm.html

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+<!DOCTYPE html>
+<html>
+
+<head>
+	<meta charset="UTF-8">
+	<title>登録内容確認</title>
+</head>
+
+<body>
+	<h1>登録内容確認</h1>
+</body>
+
+</html>