【发布时间】：2022-01-07 05:58:47
【问题描述】：
您好，我是 Java 和 Spring 本身的新手。现在我在学习JPA，一般来说，问题是这样的：当我的驱动中有这个列时，为什么Hibernate会在BaseEntity中查找last_name列？
当我尝试调用 findAll 并使用 dateTable 的概念创建查询时，这一切都会发生
Git Hub 中的项目：https://github.com/Slizzardd/nix_10/tree/master/hw_9_web_jpa
错误：
java.lang.IllegalArgumentException: Unable to locate Attribute with the the given name [last_name] on this ManagedType [ua.com.alevel.persistence.entity.BaseEntity]
at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.checkNotNull(AbstractManagedType.java:148)
at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.getAttribute(AbstractManagedType.java:119)
at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.getAttribute(AbstractManagedType.java:117)
at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.getAttribute(AbstractManagedType.java:44)
at org.hibernate.query.criteria.internal.path.AbstractFromImpl.locateAttributeInternal(AbstractFromImpl.java:111)
at org.hibernate.query.criteria.internal.path.AbstractPathImpl.locateAttribute(AbstractPathImpl.java:204)
at org.hibernate.query.criteria.internal.path.AbstractPathImpl.get(AbstractPathImpl.java:177)
at ua.com.alevel.persistence.dao.impl.DriverDaoImpl.findAll(DriverDaoImpl.java:90)
at ua.com.alevel.persistence.dao.impl.DriverDaoImpl$$FastClassBySpringCGLIB$$70e9ea23.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:783)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
at ua.com.alevel.persistence.dao.impl.DriverDaoImpl$$EnhancerBySpringCGLIB$$3de59a25.findAll(<generated>)
at ua.com.alevel.service.impl.DriverServiceImpl.findAll(DriverServiceImpl.java:60)
at ua.com.alevel.facade.impl.DriverFacadeImpl.findAll(DriverFacadeImpl.java:64)
at ua.com.alevel.view.controller.DriverController.findAll(DriverController.java:41)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1732)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:833)
我的 BaseEntity：
@MappedSuperclass
public abstract class BaseEntity {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@Temporal(TemporalType.TIMESTAMP)
private Date created;
@Temporal(TemporalType.TIMESTAMP)
private Date updated;
private Boolean visible;
@Column(name = "image_url")
private String imageUrl;
public BaseEntity() {
this.created = new Date();
this.updated = new Date();
this.visible = true;
}
@PreUpdate
public void preUpdate() {
this.updated = new Date();
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Date getCreated() {
return created;
}
public void setCreated(Date created) {
this.created = created;
}
public Date getUpdated() {
return updated;
}
public void setUpdated(Date updated) {
this.updated = updated;
}
public Boolean getVisible() {
return visible;
}
public void setVisible(Boolean visible) {
this.visible = visible;
}
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
}
我的司机：
@Entity
@Table(name = "drivers")
public class Driver extends BaseEntity {
@Column(name = "first_name")
private String firstName;
@Column(name = "last_name")
private String lastName;
private String notes;
private double balance;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(
name = "driver_car",
joinColumns = @JoinColumn(name = "driver_id"),
inverseJoinColumns = @JoinColumn(name = "car_id"))
private Set<Car> cars;
public Driver() {
super();
this.cars = new HashSet<>();
}
public Set<Car> getCars() {
return cars;
}
public void setCars(Set<Car> cars) {
this.cars = cars;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getNotes() {
return notes;
}
public void setNotes(String notes) {
this.notes = notes;
}
public double getBalance() {
return balance;
}
public void setBalance(double balance) {
this.balance = balance;
}
}
DriverDaoImpl 中的methodFindAll：
@Override
public DataTableResponse<Driver> findAll(DataTableRequest request) throws Exception {
List<Driver> drivers;
Map<Object, Object> otherParamMap = new HashMap<>();
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Driver> criteriaQuery = criteriaBuilder.createQuery(Driver.class);
Root<Driver> from = criteriaQuery.from(Driver.class);
int page = (request.getCurrentPage() - 1) * request.getPageSize();
int size = page + request.getPageSize();
if(request.getSort().equals("carCount")){
Query query;
if (request.getOrder().equals("desc")) {
query = entityManager.createQuery("select d from Driver d where d.visible = true order by d.cars.size desc")
.setFirstResult(page)
.setMaxResults(size);
} else {
query = entityManager.createQuery("select d from Driver d where d.visible = true order by d.cars.size asc")
.setFirstResult(page)
.setMaxResults(size);
}
drivers = query.getResultList();
}else {
try{
if (request.getOrder().equals("desc")) {
criteriaQuery.orderBy(criteriaBuilder.desc(from.get(request.getSort())));
} else {
criteriaQuery.orderBy(criteriaBuilder.asc(from.get(request.getSort())));
}
}catch (Exception e){
e.printStackTrace();;
}
drivers = entityManager.createQuery(criteriaQuery)
.setFirstResult(page)
.setMaxResults(size)
.getResultList();
}
for (int i = 0; i < drivers.size(); i++) {
otherParamMap.put(drivers.get(i).getId(), countNumOfCars(drivers.get(i).getId()));
}
DataTableResponse<Driver> response = new DataTableResponse<>();
response.setSort(request.getSort());
response.setOrder(request.getOrder());
response.setCurrentPage(request.getCurrentPage());
response.setCurrentSize(request.getPageSize());
response.setItems(drivers);
response.setOtherParamMap(otherParamMap);
return response;
}
private int countNumOfCars(Long id) {
return findById(id).getCars().size();
}
我的休眠配置：
@Configuration
@EnableTransactionManagement
public class HibernateConfig {
@Value("${spring.datasource.url}")
private String jdbcUrl;
@Value("${spring.datasource.username}")
private String username;
@Value("${spring.datasource.password}")
private String password;
@Value("${spring.datasource.driver-class-name}")
private String driver;
@Value("${spring.jpa.properties.hibernate.dialect}")
private String dialect;
@Value("${spring.jpa.hibernate.ddl-auto}")
private String hbm2ddl;
@Value("${spring.jpa.show-sql}")
private Boolean showSql;
@Value("${spring.jpa.properties.hibernate.jdbc.max_size}")
private String maxSize;
@Value("${spring.jpa.properties.hibernate.jdbc.min_size}")
private String minSize;
@Value("${spring.jpa.properties.hibernate.jdbc.batch_size}")
private String batchSize;
@Value("${spring.jpa.properties.hibernate.jdbc.fetch_size}")
private String fetchSize;
@Value("${spring.jpa.properties.hibernate.enable_lazy_load_no_trans}")
private String lazyLoad;
private static final String HIBERNATE_DIALECT = "hibernate.dialect";
private static final String HIBERNATE_HBM2DDL_AUTO = "hibernate.hbm2ddl.auto";
private static final String HIBERNATE_SHOW_SQL = "hibernate.show_sql";
private static final String HIBERNATE_ENABLE_LAZY_LOAD_NO_TRANS = "hibernate.enable_lazy_load_no_trans";
private static final String MAX_SIZE = "hibernate.c3p0.max_size";
private static final String MIN_SIZE = "hibernate.c3p0.min_size";
private static final String BATCH_SIZE = "hibernate.jdbc.batch_size";
private static final String FETCH_SIZE = "hibernate.jdbc.fetch_size";
private static final String ENTITY_MANAGER_PACKAGES_TO_SCAN = "ua.com.alevel.persistence.entity";
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(driver);
dataSource.setUrl(jdbcUrl);
dataSource.setUsername(username);
dataSource.setPassword(password);
return dataSource;
}
@Bean
public HibernateTransactionManager transactionManager() {
HibernateTransactionManager manager = new HibernateTransactionManager();
manager.setSessionFactory(sessionFactoryBean().getObject());
return manager;
}
@Bean
public LocalSessionFactoryBean sessionFactoryBean() {
LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSource());
sessionFactoryBean.setPackagesToScan(ENTITY_MANAGER_PACKAGES_TO_SCAN);
sessionFactoryBean.setHibernateProperties(hibernateProperties());
try {
sessionFactoryBean.afterPropertiesSet();
} catch (IOException e) {
e.printStackTrace();
}
return sessionFactoryBean;
}
private Properties hibernateProperties() {
Properties properties = new Properties();
properties.put(HIBERNATE_DIALECT, dialect);
properties.put(HIBERNATE_HBM2DDL_AUTO, hbm2ddl);
properties.put(HIBERNATE_SHOW_SQL, showSql);
properties.put(HIBERNATE_ENABLE_LAZY_LOAD_NO_TRANS, lazyLoad);
properties.put(MAX_SIZE, maxSize);
properties.put(MIN_SIZE, minSize);
properties.put(BATCH_SIZE, batchSize);
properties.put(FETCH_SIZE, fetchSize);
return properties;
}
}
我的 application.properties：
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/taxi_bd?useSSL=false&serverTimezone=UTC&createDatabaseIfNotExist=true
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.platform=mysql
spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL8Dialect
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate5.SpringSessionContext
spring.jpa.properties.hibernate.enable_lazy_load_no_trans=true
spring.jpa.properties.hibernate.jdbc.batch_size=50
spring.jpa.properties.hibernate.jdbc.fetch_size=50
spring.jpa.properties.hibernate.jdbc.max_size=25
spring.jpa.properties.hibernate.jdbc.min_size=10
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
我的主应用程序：
@SpringBootApplication(exclude = {
DataSourceAutoConfiguration.class,
DataSourceTransactionManagerAutoConfiguration.class,
HibernateJpaAutoConfiguration.class })
public class WebJpaApplication {
public static void main(String[] args) {
SpringApplication.run(WebJpaApplication.class, args);
}
}
【问题讨论】：