java - java.lang.IllegalArgumentException : Not a managed type 的问题

Question

我知道我问的问题与其他用户之前问过的问题相同，但我想知道 Stack Overflow 中是否有任何页面可以解决我的问题。

我有一个如下定义的数据库配置类:

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = {AppConfig.CLASS_REPOSITORIES})
public class DatabaseConfig {

    private static final Logger LOG = Log.getLog(AppConfig.class);

    @Autowired
    AppConfig config;

    //Bean methods
}

常数AppConfig.CLASS_REPOSITORIES在应用程序配置类中定义，定义如下:

@Configuration
@ComponentScan({AppConfig.CLASS_SERVICES,AppConfig.CLASS_WEB, AppConfig.CLASS_WEBCORE}) 
@Import({DatabaseConfig.class, WebConfig.class, DBIccidsConfig.class, DBOabiConfig.class})
public class AppConfig  {
    private static final Logger LOG = Log.getLog(AppConfig.class);
    /**************************************************/

    /**************************************************/
    public static final  String CONS_APP_CONFIG      =  Constants.NAME.toUpperCase();    
    public static final  String CLASS_SERVICES       = "cl.claro.berrws.business.services";
    public static final  String CLASS_WEB            = "cl.claro.berrws.soap.controllers";
    public static final  String CLASS_WEBCORE        = "cl.claro.berrws.soap.core";
    public static final  String CLASS_REPOSITORIES   = "cl.claro.berrws.persistence.repositories";
    public static final  String CLASS_ENTITIES       = "cl.claro.berrws.persistence.entities";
    public static final  String CLASS_ICCIDS_REPOSITORIES   = "cl.claro.berrws.persistence.iccids.repositories";
    public static final  String CLASS_ICCIDS_ENTITIES       = "cl.claro.berrws.persistence.iccids.entities";   
    public static final  String CLASS_OABI_REPOSITORIES   = "cl.claro.berrws.persistence.imeioabi.repositories";
    public static final  String CLASS_OABI_ENTITIES       = "cl.claro.berrws.persistence.imeioabi.entities";   

//Bean methods that are not relevant for this problem

常数CLASS_REPOSITORIES指向包cl.claro.berrws.persistence.iccids.repositories包含两个存储库接口(interface)。其中之一是EstadoRepository ，定义如下:

package cl.claro.berrws.persistence.repositories;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;

import cl.claro.berrws.persistence.entities.Estado;

@Repository
public interface EstadoRepository extends JpaRepository<Estado, String>{
    @Query("SELECT e FROM Estado e WHERE e.imei=:imei")
    public Estado obtieneEstado(@Param("imei") String imei);
}

类(class)Estado存在于包cl.claro.berrws.persistence.entities中由常量 CLASS_ENTITIES 引用在 AppConfig类(class)。类(class)Estado定义如下:

@Data
@Entity
@Table(name = "TBL_ESTADOS")
@XmlRootElement
public class Estado implements Serializable {
    //Some attributes
    @Id
    @Column(name = "IMEI", length=20)
    @Basic(optional = false)
    private String imei;

    //More attributes
}

属性的顺序是在数据库(Oracle 数据库)中建立的

DatabaseConfig class 定义了使用实体类的 Bean 方法，如下所示:

@Bean
    LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource, Environment env) {
        if (LOG.isInfoEnabled()) LOG.info("Configurando ENTITY MANAGER");
        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setDataSource(dataSource);
        entityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
        entityManagerFactoryBean.setPackagesToScan(AppConfig.CLASS_ENTITIES);
        Properties jpaProperties = new Properties();
        jpaProperties.put("hibernate.dialect",Config.getConfig("hibernate.dialect"));        
        jpaProperties.put("hibernate.show_sql",Config.getConfig("hibernate.showSql"));
        jpaProperties.put("hibernate.format_sql",Config.getConfig("hibernate.format_sql")); 
        jpaProperties.put("hibernate.hbm2ddl.auto",Config.getConfig("hibernate.hbm2ddl")); 
        jpaProperties.put("hibernate.enable_lazy_load_no_trans",true); 
        entityManagerFactoryBean.setJpaProperties(jpaProperties);        
        return entityManagerFactoryBean;
    }    

不过，当我执行我的应用程序时，我收到以下异常: java.lang.IllegalArgumentException: Not a managed type: class cl.claro.berrws.persistence.entities.Estado

我是不是错过了什么？预先感谢各位。

P.D.:该应用程序还使用 Maven。不知道有没有关系。

Answer 1

可能出现此问题是因为您的类 cl.claro.berrws.persistence.entities.Estado 的 bean 未创建。在 DatabaseConfig .class 中，您仅指定要扫描的包 AppConfig.CLASS_REPOSITORIES，因此请尝试添加以下内容:

@ComponentScan("cl.claro.berrws.persistence.entities")

这样实体类也会被 spring 拾取。所以你的配置应该是这样的:

@Configuration
@EnableTransactionManagement
@ComponentScan("cl.claro.berrws.persistence.entities")
@EnableJpaRepositories(basePackages = {AppConfig.CLASS_REPOSITORIES})
public class DatabaseConfig {

    private static final Logger LOG = Log.getLog(AppConfig.class);

    @Autowired
    AppConfig config;

    //Bean methods
}

或者您可以尝试使用 @EntityScan 注释指定实体类包，例如:

@EntityScan( basePackages = {"domain"} )