NoSuchBeanDefinitionException:没有名为“entityManagerFactory”的bean可用

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【中文标题】NoSuchBeanDefinitionException:没有名为“entityManagerFactory”的bean可用【英文标题】:NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available 【发布时间】:2018-11-07 17:55:09 【问题描述】:

我在构建时遇到此错误。我在这里提到了其他答案,但没有一个对我有用。

application.properties

spring.datasource.platform=postgres
spring.datasource.url=jdbc:postgresql://localhost:5432/externalPoc
spring.datasource.username=postgres
spring.datasource.password=
spring.database.driverClassName=org.postgresql.Driver
spring.jpa.hibernate.ddl-auto=update
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.show-sql=false
hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect

存储库:

@Repository
public interface CardRepository extends JpaRepository<CardRegistration, Serializable> 
    Optional<Card> findByUuid(String uuid);

实体:

@Entity
public class Card extends AbstractBaseEntity implements Serializable 

    String uuid;
    String validFrom;
    String validTo;


    public String getValidFrom() 
        return validFrom;
    

    public void setValidFrom(String validFrom) 
        this.validFrom = validFrom;
    

    public String getValidTo() 
        return validTo;
    

    public void setValidTo(String validTo) 
        this.validTo = validTo;
    

    public String getUuid() 
        return uuid;
    

    public void setUuid(String uuid) 
        this.uuid = uuid;
    


和 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.start.new.project</groupId>
    <artifactId>externalAdapterPoc</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>externalPoc</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.13.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <springfox-swagger.version>2.7.0</springfox-swagger.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-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</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.postgresql</groupId>
          <artifactId>postgresql</artifactId>
          <version>9.4-1206-jdbc42</version><!--$NO-MVN-MAN-VER$-->
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.1.4.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.2.3.Final</version>
        </dependency>
        <!-- swagger -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>$springfox-swagger.version</version>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>$springfox-swagger.version</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-collections4</artifactId>
            <version>4.1</version>
        </dependency>
        <dependency>
            <groupId>ma.glasnost.orika</groupId>
            <artifactId>orika-core</artifactId>
            <version>1.5.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
        <dependency>
            <groupId>org.hamcrest</groupId>
            <artifactId>hamcrest-all</artifactId>
            <version>1.3</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <artifactId>hamcrest-core</artifactId>
                    <groupId>org.hamcrest</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-core</artifactId>
            <version>1.9.5</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.jayway.jsonpath</groupId>
            <artifactId>json-path</artifactId>
            <version>0.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.jayway.jsonpath</groupId>
            <artifactId>json-path-assert</artifactId>
            <version>0.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.2.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.json/json -->
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20171018</version>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

和主类(spring boot 应用)

@SpringBootApplication
@EnableJpaRepositories(basePackages = "com.start.new.project.externalPoc.model.repository")
@EntityScan(basePackages = "com.start.new.project.externalPoc.model")
public class ExternalPocApplication 

    public static void main(String[] args) 
        SpringApplication.run(ExternalPocApplication.class, args);
    

    @Bean
    public MapperFacade mapper() 
        MapperFactory mapperFactory = new DefaultMapperFactory.Builder().build();
        return mapperFactory.getMapperFacade();
    

我从 .m2 目录中删除了所有文件夹。再次运行 mvn clean install。得到同样的错误。 服务类自动装配存储库。 控制器使用 @RestController 注释。

这就是确切的原因:

引起:org.springframework.beans.factory.BeanCreationException: 创建名为“(内部 bean)#4d3ca6c7”的 bean 时出错:无法解析 在设置构造函数时引用 bean 'entityManagerFactory' 争论;嵌套异常是 org.springframework.beans.factory.NoSuchBeanDefinitionException: 否 名为“entityManagerFactory”的 bean 可用

【问题讨论】:

我发现类 EntityManagerFactory 应该在 javax.persistance package 中,所以也许你只需要 this dependecy 到 pom 文件?只是猜测 没用 :( .. 这就是你的全部代码吗?似乎您尝试在使用 entityManagerFactory 的地方创建 bean,但之前忘记创建它 是的,这就是所有的代码。我没有添加控制器和服务。 【参考方案1】:

从https://start.spring.io(选择Switch to the full version and tick PostGres, for example)创建一个虚拟项目,然后将您的类添加到该项目中。

这样您就不必担心依赖关系,并且默认情况下您会获得最新的。我昨天用过它,它对我来说就像一个魅力。

【讨论】:

【参考方案2】:

在自动装配 bean 的服务类顶部添加 @ComponentScan(basePackageClasses = ("Name of your entityManagerFactory bean class").class)。还要在entityManagerFactory bean 类之上添加@Component 或其派生注解

【讨论】:

什么是 entityManagerFactory bean 类?是实体吗?还是存储库? bean 类意味着 entityManagerFactory 看起来像一个变量(例如 String 字符串;这里的 string 是 String 类的变量)。现在无论变量属于哪个类,您都可以将其名称或其实现之一(如果它是接口)代替括号如果您可以提供指向声明变量的实际代码的链接,我可能会提供帮助更好:)

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