Spring Boot项目无法从MySQL数据库加载数据求助

我正在跟着教程搭建基于Angular和Spring Boot的全栈电商应用，从start.spring.io生成项目后，添加了MySQL Driver、Lombok、Spring Data JPA及Spring Data REST依赖。项目启动后遇到以下问题：

• 后端接口返回空数组，而教程中相同接口能返回数据库里的完整数据列表
• Angular前端调用接口后无数据展示，教程里则能正常渲染数据

application.properties 配置 #

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/full-stack-ecommerce?useSSL=false&useUnicode=yes&characterEncoding=UTF-8&allowPublicKeyRetrieval=true&serverTimezone=UTC
spring.datasource.username=ecommerceapp
spring.datasource.password=ecommerceapp

spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect

spring.data.rest.base-path=/api

server.port=9091

pom.xml 配置 #

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.luv2code</groupId>
    <artifactId>spring-boot-ecommerce</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-boot-ecommerce</name>
    <description>Spring Boot Ecommerce Project</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency> 
                    <groupId>org.hibernate</groupId> 
                    <artifactId>hibernate-core</artifactId> 
                     
</dependency>
<dependency> 
                      <groupId>org.hibernate</groupId> 
                      <artifactId>hibernate-entitymanager</artifactId> 
                      </dependency>
<dependency> 
                        <groupId>javax.xml.bind</groupId> 
                        <artifactId>jaxb-api</artifactId> 
                        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

麻烦帮忙排查问题，谢谢！

内容的提问来源于stack exchange，提问作者Jalel MED