Spring 引导项目未从数据库重新加载数据

Question

我第一次使用 angular 和 spring 引导开发完整的堆栈应用程序（我正在关注完整的项目教程），

我从https://start.spring.io/下载了一个项目并添加了以下依赖项； mySQL driver, lombok, spring data JPA and REST repositories.after working on my project and executing it,i found out that the data are not loaded from the database (PS: database not empty): and here's my execution result

:虽然这是导师的结果

我拒绝它并尝试使用 angular 在前端消耗数据，这是我的结果

虽然这是我导师的结果

我将在这里与您分享我的应用程序属性：

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

和我的 pom.xml：

<?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>

我真的很感激任何帮助

Answer 1

我现在正在做完全相同的乍得项目，一切正常，Java 17 和 spring 2.6.1

这是应用程序属性（我更改了用户名、密码）：

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=angfullecom
spring.datasource.password=angfullecom

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

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

如您所见，我没有您的线路：server.port=9091

我的 pom 文件：

<?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>2.6.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ilze</groupId>
    <artifactId>full-ang-ecommerce</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>full-ang-ecommerce</name>
    <description>Spring Boot Angular 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>
    </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>

您是否使用地址 http://localhost:8080/api/products 访问了该项目？