spring-boot - SpringBoot 2.4.0 - CrudRepository 自动装配错误
问题描述
早上好，我正在使用 maven 开发一个多模块 Springboot 项目。目前，只有一个名为“students-microservice”的子模块，我在其中声明了一个扩展 CrudRepository 的接口，并通过自动装配将其注入到我的服务中。主类仅包含 @SpringBootApplication 注释，当我尝试运行它时，出现以下错误：
Field studentRepository in com.eara.microservices.app.students.service.StudentServiceImpl required a bean of type 'com.eara.microservices.app.students.repository.StudentRepository' that could not be found.
The injection point has the following annotations:
- @ org.springframework.beans.factory.annotation.Autowired (required = true)
Action:
Consider defining a bean of type 'com.eara.microservices.app.students.repository.StudentRepository' in your configuration.
如果我将 @Repository 注释添加到扩展 CrudRepository 的接口并再次运行它，我会得到同样的错误。如果我将包含存储库的包的 @EnableJpaRepositories 注释添加到主类，我会收到错误消息：
Description:
Field studentRepository in com.eara.microservices.app.students.service.StudentServiceImpl required a bean named 'entityManagerFactory' that could not be found.
The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
父pom.xml如下：
<?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>
<modules>
<module>students-microservice</module>
</modules>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.eara.microservices.app</groupId>
<artifactId>parent-microservice</artifactId>
<packaging>pom</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>parent-microservice</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<testcontainers.version>1.15.0</testcontainers.version>
<io.swagger.version>1.6.2</io.swagger.version>
<model.mapper.version>2.3.7</model.mapper.version>
<mariadb-java-client.version>2.5.4</mariadb-java-client.version>
<mariadb.version>1.15.1</mariadb.version>
<maven.surefire.plugin.version>2.22.2</maven.surefire.plugin.version>
<maven-dependency-plugin.version>3.1.2</maven-dependency-plugin.version>
<maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
<spring-cloud.version>2020.0.0-M5</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- jpa, crud repository -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.16</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>net.logstash.logback</groupId>
<artifactId>logstash-logback-encoder</artifactId>
<version>6.5</version>
</dependency>
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-core</artifactId>
<version>${io.swagger.version}</version>
</dependency>
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-jaxrs</artifactId>
<version>${io.swagger.version}</version>
</dependency>
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-annotations</artifactId>
<version>${io.swagger.version}</version>
</dependency>
<!-- Model Mapper -->
<dependency>
<groupId>org.modelmapper</groupId>
<artifactId>modelmapper</artifactId>
<version>${model.mapper.version}</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.22</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.mariadb.jdbc</groupId>
<artifactId>mariadb-java-client</artifactId>
<version>${mariadb-java-client.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>${maven-dependency-plugin.version}</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven.surefire.plugin.version}</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
子模块的 pom.xml 如下：
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>parent-microservice</artifactId>
<groupId>com.eara.microservices.app</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>students-microservice</artifactId>
<properties>
</properties>
<dependencies>
<dependency>
<groupId>org.mariadb.jdbc</groupId>
<artifactId>mariadb-java-client</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<finalName>students-service</finalName>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
有人会帮助我解决这个问题，好吗？
提前非常感谢。
埃内斯托。
解决方案
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