无法在没有 xml 的情况下将类映射到休眠".setAnnotatedClasses()"并出现"2QuerySyntaxException: FileEntity is not mapped"错误

Question

大家好我正在尝试使用.setAnnotatedClass((或.setPackagesToScan((法将类(FileEntity(映射到Hibernate。但我一次又一次地犯同样的错误。

org.hibernate.hql.internal.ast.QuerySyntaxException: FileEntity is not mapped

当我用.xml映射类时，一切都很好。

请告诉我，我的错误在哪里？

ApplicationContextConfig.java

@Configuration
@ComponentScan("com.group.appName")
@EnableTransactionManagement
@PropertySource("classpath:application.properties")
public class ApplicationContextConfig {

@Autowired
Environment environment;

@Bean(name = "viewResolver")
public InternalResourceViewResolver getViewResolver() {
return new InternalResourceViewResolver();
}

@Bean(name = "dataSource")
public DataSource getDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setUrl(environment.getProperty("spring.datasource.url"));
dataSource.setUsername(environment.getProperty("spring.datasource.username"));
dataSource.setPassword(environment.getProperty("spring.datasource.password"));
return dataSource;
}

@Autowired
@Bean(name = "sessionFactory")
public SessionFactory getSessionFactory(@Qualifier("dataSource") DataSource dataSource) throws Exception {
Properties properties = new Properties();

properties.put("hibernate.dialect", environment.getProperty("spring.jpa.properties.hibernate.dialect"));
properties.put("hibernate.show_sql", environment.getProperty("spring.jpa.show-sql"));
properties.put("current_session_context_class",                 environment.getProperty("spring.jpa.properties.hibernate.current_session_context_class"));

LocalSessionFactoryBean factoryBean = new LocalSessionFactoryBean();

factoryBean.setDataSource(dataSource);
factoryBean.setHibernateProperties(properties);
factoryBean.afterPropertiesSet();
factoryBean.setPackagesToScan("com.group.appName.model");
//      or another method
factoryBean.setAnnotatedClasses(FileEntity.class);

return factoryBean.getObject();
}

@Autowired
@Bean(name = "transactionManager" )
public HibernateTransactionManager getTransactionManager(SessionFactory sessionFactory) {
HibernateTransactionManager transactionManager
= new HibernateTransactionManager(sessionFactory);
return transactionManager;
}

@Bean(name = "multipartResolver")
public CommonsMultipartResolver getCommonsMultipartResolver() {
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
multipartResolver.setMaxUploadSize(20971520); // 20MB
multipartResolver.setMaxInMemorySize(1048576);  // 1MB
return multipartResolver;
}
}

FileEntity.java

@Entity
@Table(name ="files_upload")
public class FileEntity {
private String fileName;
private Byte[] fileData;

@Id
@Column(name = "file_name")
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}

@Column(name = "file_data")
public Byte [] getFileData() {
return fileData;
}
public void setFileData(Byte [] fileData) {
this.fileData = fileData;
}
}

application.properties

server.port=9090
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/filedb?serverTimezone=Europe/Moscow
spring.datasource.username=root
spring.datasource.password=241299
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=none
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate5.SpringSessionContext

Answer 1

好的。我修好了。重点是，在方法getSessionFactory中，在创建类LocalSessionFactoryBean的对象后，第一行应该是

factoryBean.setAnnotatedClasses(FileEntity.class);

因此，创建LocalSessionFactoryBean类的对象的正确方法是：

LocalSessionFactoryBean factoryBean = new LocalSessionFactoryBean();

factoryBean.setAnnotatedClasses(FileEntity.class); - first line.
factoryBean.setDataSource(dataSource);
factoryBean.setHibernateProperties(properties);
factoryBean.afterPropertiesSet();