Question

嗨，我正在Spring Boot中使用Java配置进行JPA和Hibernate配置，但在这个错误下我停留了几个小时。即使我已将UserRepository声明为bean，它仍然无法获取该存储库。

package com.repository;

@Repository
public interface UserRepository extends JpaRepository<User, Long> {}

我正在使用此存储库的服务类：

package com.service;

@Service
public class AppointmentPaymentServiceImpl implements AppointmentPaymentService {

@Autowired
private UserRepository userRepository;
......
......
}

我的数据库配置：

package com.config;

@Configuration
@PropertySource(value = { "classpath:application.properties" })
@EnableTransactionManagement
@EnableJpaRepositories("com.repository.*")
@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class,HibernateJpaAutoConfiguration.class})
public class DBConfig {

@Value("${spring.datasource.driver-class-name}")
public String driver;

@Value("${spring.datasource.url}")
public String url;

@Value("${spring.datasource.username}")
public String username;

@Value("${spring.datasource.password}")
public String password;

@Value("${spring.jpa.properties.hibernate.dialect}")
public String dialect;

@Value("${spring.jpa.hibernate.ddl-auto}")
public String ddl;

@Bean(name = "dataSource")
public DriverManagerDataSource dataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName(driver);
    dataSource.setUrl(url);
    dataSource.setUsername(username);
    dataSource.setPassword(password);

    return dataSource;
}


@Bean(name = "sessionFactory")
public LocalSessionFactoryBean hibernateSessionFactory(DataSource dataSource) {
    LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
    sessionFactory.setDataSource(dataSource());
    sessionFactory.setPackagesToScan(new String[] { "com.model.*" });
    sessionFactory.setHibernateProperties(hibernateProperties());
    return sessionFactory;
}


@Bean
HibernateTransactionManager transactionManagerHib(SessionFactory sessionFactory) {
    HibernateTransactionManager transactionManager = new HibernateTransactionManager();
    transactionManager.setSessionFactory(sessionFactory);
    return transactionManager;
}

/*@Bean
@Qualifier(value = "entityManager")
public EntityManager entityManager(EntityManagerFactory entityManagerFactory) {
    return entityManagerFactory.createEntityManager();
}*/

@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
    return new PersistenceExceptionTranslationPostProcessor();
}

@Bean
 public LocalContainerEntityManagerFactoryBean entityManagerFactory() {

HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
 vendorAdapter.setDatabase(Database.MYSQL);
 vendorAdapter.setGenerateDdl(true);

 LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
 em.setDataSource(dataSource());
 em.setPackagesToScan("com.model.*");
em.setJpaVendorAdapter(vendorAdapter);
 em.setJpaProperties(hibernateProperties());

 return em;
}

@Bean
 public PlatformTransactionManager transactionManager(EntityManagerFactory emf){
 JpaTransactionManager transactionManager = new JpaTransactionManager();
 transactionManager.setEntityManagerFactory(emf);

 return transactionManager;
}

Properties hibernateProperties() {
    return new Properties() {
        {
            setProperty("hibernate.hbm2ddl.auto", ddl);
            setProperty("hibernate.connection.useUnicode", "true");
            setProperty("spring.jpa.hibernate.ddl-auto", ddl);
            setProperty("hibernate.dialect", dialect);
            setProperty("spring.jpa.properties.hibernate.dialect", dialect);
            setProperty("hibernate.globally_quoted_identifiers", "true");
            setProperty("hibernate.connection.CharSet", "utf8mb4");
            setProperty("hibernate.connection.characterEncoding", "utf8");

        }
    };
}

}

这是我的主要课程：

package com; 

@SpringBootApplication
@ComponentScan(basePackages = { "com.*"})
@EnableCaching
@Configuration
@PropertySource({"classpath:logging.properties"})
public class MainApplication {

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

}

如果我仅使用spring数据jpa，则我的pom.xml包含hibernate和jpa的这些依赖项，然后hibernate-core 5.0.12.Final默认情况下是导入的，我不想这样做：

  <dependencies>
    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-jpa</artifactId>
    </dependency>
    .
    .
    .
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>5.2.10.Final</version>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>5.2.3.Final</version>
    </dependency>
  </dependencies>

错误：

***************************
APPLICATION FAILED TO START
***************************

Description:

Field userRepository in com.service.AppointmentPaymentServiceImpl required a bean of type 'com.repository.UserRepository' that could not be found.


Action:

Consider defining a bean of type 'com.repository.UserRepository' in your configuration.

我的用户实体：

package com.model;

@Entity
@Table(name = "USER")
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue
@Column(name = "id")
private Long id;

@NotNull
@Column(name = "city_id")
private Long cityId;

@Column(name = "name")
private String name;

@Column(name = "age")
private int age;

@Column(name = "locality")
private String locality;

@Column(name = "gender")
private String gender;

}

Answer 1

在主spring boot应用程序类中添加以下注释解决了我的问题：

@ComponentScan（“ com.myapp.repositories”）

Answer 2

您的@EnableJpaRepositories注释错误。您无需定义以这种方式在哪里找到存储库的软件包。

假定它们所驻留的包称为：

foo.somepackage.repositories，则注释应为@EnableJpaRepositories("foo.somepackage.repositories")。

尝试更正注释，以正确正确地扫描您的存储库软件包，以将其带入上下文。

Answer 3

我认为您的代码必须在<insert service here>下组织，并且Book应该有效。例如：String[]，String[] entries =line.split(","); Book book = new Book(entries[0], entries[1], Integer.parseInt(entries[2].trim()));

Answer 4

只需将AppointmentPaymentServiceImpl和UserRepository放在同一包中，对我来说，它们就是com.

Answer 5

我遇到了同样的问题。我只是将存储库从我的工作项目复制到一个新项目，并且在考虑定义类型为 com.[packagename].repository.[repository-name] 的 bean 时遇到了同样的错误。以上没有对我有用，后来我做了以下事情：

去掉了POM文件中JPA依赖的版本（去掉了版本标签）
我使用的是 Java 15，当我从 start.spring.io 创建 SpringBoot 项目时，只有 11 和 16 个 fava 版本。所以我为我的项目选择了 11。我也在 POM 文件中更改了它
15（之前是11）
现在我删除了主文件中的 @ComponentScan 注释，这也是早期对我有用的解决方案。
只需使缓存无效并重新启动
输入 mvn clean install
mvn clean spring-boot:run 希望这对你也有用

考虑在配置中定义类型为“ com.repository.UserRepository”的bean

5 个答案: