springを用いて表示させようとしたらエラーになる

[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 18.154 s <<< FAILURE! - in jp.co.sss.shop.SharedShop3ApplicationTests
[ERROR] contextLoads  Time elapsed: 0.007 s  <<< ERROR!
java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set

[INFO] 
[INFO] Results:
[INFO] 
[ERROR] Errors: 
[ERROR]   SharedShop3ApplicationTests.contextLoads » IllegalState Failed to load Applica...
[INFO] 
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  28.589 s
[INFO] Finished at: 2022-08-23T16:05:08+09:00
[INFO] ------------------------------------------------------------------------
[WARNING] The requested profile "pom.xml" could not be activated because it does not exist.
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project shared_shop3: There are test failures.
[ERROR] 
[ERROR] Please refer to C:\Users\宮城\Desktop\shared_shop_SelectJoin\shared_shop3\target\surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

package jp.co.sss.shop.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

@Entity
@Table(name = "items")
public class Item {
	 @Id
	 @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq_items_gen")
	 @SequenceGenerator(name = "seq_items_gen", sequenceName = "seq_items",
	 allocationSize = 1)
	 private Integer id;

	 @Column
	 private String name;

	 @Column
	 private Integer price;

	 public Integer getId() {
	 return id;
	 }

	 public void setId(Integer id) {
		 this.id = id;
	 }

	 public String getName() {
		 return name;
	 }

	 public void setName(String name) {
		 this.name = name;
	 }

	 public Integer getPrice() {
		 return price;
	 }

	 public void setPrice(Integer price) {
		 this.price = price;
	 }

}

package jp.co.sss.shop.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import jp.co.sss.shop.entity.Item;

public interface ItemRepository extends JpaRepository<Item, Integer>{

}

package jp.co.sss.shop.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import jp.co.sss.shop.repository.ItemRepository;

@Controller
public class ItemController {
	 @Autowired
	 ItemRepository repository;

	 @RequestMapping("/items/findAll")
	 public String showItemList(Model model) {
		 model.addAttribute("items", repository.findAll());
		 return "items/item_list";
	 }
}

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
	<head>
		<meta charset="UTF-8" />
		<title>Insert title here</title>
	</head>
	<body>
		<div>商品一覧</div>
		<table>
			<tr>
				<th>商品番号</th>
				<th>商品名</th>
				<th>価格</th>
			</tr>
			<tr th:each="item: ${items}">
				<td th:text="${item.id}"></td>
				<td th:text="${item.name}"></td>
				<td th:text="${item.price}"></td>
			</tr>
		</table>
	</body>
</html>