[EDIT]transactionRepositoryにカテゴリ別集計を追記しました。

src/main/java/com/example/demo/app/domain/service/impl/AnalysisServiceImpl.java

@@ -1,8 +1,9 @@
-package com.example.demo.app.domain.service;
+package com.example.demo.app.domain.service.impl;
 
 import org.springframework.stereotype.Service;
 
 import com.example.demo.app.domain.model.AnalysisModel;
+import com.example.demo.app.domain.service.AnalysisService;
 
 import lombok.RequiredArgsConstructor;
 

src/main/java/com/example/demo/app/infra/repository/AllocationRepository.java

@@ -1,9 +1,12 @@
 package com.example.demo.app.infra.repository;
 
+import java.util.List;
+
 import org.springframework.data.jpa.repository.JpaRepository;
 
 import com.example.demo.app.infra.entity.AllocationEntity;
 
 public interface AllocationRepository extends JpaRepository<AllocationEntity, Long>{
 	
+	List<AllocationEntity> findByCourseId(Long courseId);
 }

src/main/java/com/example/demo/app/infra/repository/TransactionRepository.java

@@ -22,5 +22,6 @@ public interface TransactionRepository extends JpaRepository<TransactionEntity,
 	@Query("select sum(t.amount) from TransactionEntity t inner join CategoryEntity c on t.categoryId = c.categoryId where (t.userId = :userId and t.transactionDate between :startDate and :endDate) and c.transactionType = 1")
 	public Integer findTotalIncome(LocalDate startDate, LocalDate endDate, Long userId);
 	
-	
+	@Query("select sum(t.amount) from TransactionEntity t where t.userEntity.userId = :userId and t.categoryEntity.categoryId = :categoryId and t.transactionDate between :startDate and :endDate")
+	public Integer findCategoryExpense(LocalDate startDate, LocalDate endDate, Long userId, Long categoryId);
 }

src/main/resources/templates/analysis.html

@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
+<title>分析画面</title>
+<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.7/dist/css/bootstrap.min.css" rel="stylesheet">
+</head>
+<body>
+	
+	<h2 class="text-center">支出分析</h2>
+	
+	<table class="table text-center">
+        <thead>
+	        <tr>
+                <th scope="col">カテゴリ別</th>
+			    <th scope="col">支出</th>
+			    <th scope="col">前月比</th>
+			</tr>
+        </thead>
+        <tbody>
+			<tr>
+		      <th scope="row">総支出</th>
+			      <td>￥234,000</td>
+			      <td>+￥38,000</td>
+		      </tr>
+		</tbody>
+	</table>
+	
+	<hr class="border border-primary border-2 opacity-50">
+	
+	<table class="table text-center">
+	  <thead>
+	    <tr>
+	      <th scope="col">カテゴリ別</th>
+	      <th scope="col">支出</th>
+	      <th scope="col">前月比<br>コース比</th>
+	    </tr>
+	  </thead>
+	  <tbody>
+	    <tr>
+	      <th scope="row">食費</th>
+	      <td>￥34,000</td>
+	      <td>+￥8,000<br>+￥1,100</td>
+	    </tr>
+	    <tr>
+	      <th scope="row">交通費</th>
+	      <td>￥14,000</td>
+	      <td>+￥8,000<br>+￥1,100</td>
+	    </tr>
+	    <tr>
+	      <th scope="row">日用品</th>
+	      <td>￥4,000</td>
+	      <td>+￥8,000<br>+￥1,100</td>
+	    </tr>
+	  </tbody>
+	</table>
+	
+	<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.7/dist/js/bootstrap.bundle.min.js"></script>
+</body>
+</html>