我使用spring boot，使用h2数据库创建spring data jpa并向其中添加一些数据。但是，当我添加数据时，会抛出错误：
> HHH000346: Error during managed flush
> [org.hibernate.exception.ConstraintViolationException: could not
> execute statement]
在我的代码下面：
歌手实体：
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import lombok.Data;
import org.springframework.format.annotation.DateTimeFormat;
import javax.persistence.*;
import java.util.*;
@Entity
public class Singer {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "SINGER_ID")
private Long id;
@Column(name = "FIRST_NAME")
private String firstName;
@Column(name = "LAST_NAME")
private String lastName;
@Column(name = "BIRTH_DAY")
@Temporal(TemporalType.TIMESTAMP)
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)
private Date birthDay;
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true, mappedBy = "singer")
@JsonIgnoreProperties("singers")
private Set<Album> albums = new HashSet<>();
@ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinTable(name = "singer_instrument", joinColumns = @JoinColumn(name = "SINGER_ID"),
inverseJoinColumns = @JoinColumn(name = "INSTRUMENT_ID"))
@JsonIgnoreProperties("singers")
private Set<Instrument> instruments = new HashSet<>();
public boolean addAlbums(Album album) {
album.setSinger(this);
return getAlbums().add(album);
}
public boolean addInstrument(Instrument instrument) {
return instruments.add(instrument);
}
public Singer() {
}
public Singer(String firstName, String lastName, Date birthDay, Set<Album> albums, Set<Instrument> instruments) {
this.firstName = firstName;
this.lastName = lastName;
this.birthDay = birthDay;
this.albums = albums;
this.instruments = instruments;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
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 Date getBirthDay() {
return birthDay;
}
public void setBirthDay(Date birthDay) {
this.birthDay = birthDay;
}
public Set<Album> getAlbums() {
return albums;
}
public void setAlbums(Set<Album> albums) {
this.albums = albums;
}
public Set<Instrument> getInstruments() {
return instruments;
}
public void setInstruments(Set<Instrument> instruments) {
this.instruments = instruments;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Singer singer = (Singer) o;
return Objects.equals(id, singer.id) &&
Objects.equals(firstName, singer.firstName) &&
Objects.equals(lastName, singer.lastName) &&
Objects.equals(birthDay, singer.birthDay) &&
Objects.equals(albums, singer.albums) &&
Objects.equals(instruments, singer.instruments);
}
@Override
public int hashCode() {
return Objects.hash(id, firstName, lastName, birthDay, albums, instruments);
}
@Override
public String toString() {
return "Singer{" +
"id=" + id +
", firstName='" + firstName + '\'' +
", lastName='" + lastName + '\'' +
", birthDay=" + birthDay +
", albums=" + albums +
", instruments=" + instruments +
'}';
}
}
仪器实体：
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import lombok.Data;
import javax.persistence.*;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;
@Entity
public class Instrument implements Serializable {
@Id
@Column(name = "ID")
private String instrumentId;
@ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinTable(name = "singer_instrument", joinColumns = @JoinColumn(name = "INSTRUMENT_ID"), inverseJoinColumns = @JoinColumn(name = "SINGER_ID"))
@JsonIgnoreProperties("instruments")
private Set<Singer> singers = new HashSet<>();
public String getInstrumentId() {
return instrumentId;
}
public void setInstrumentId(String instrumentId) {
this.instrumentId = instrumentId;
}
public Set<Singer> getSingers() {
return singers;
}
public void setSingers(Set<Singer> singers) {
this.singers = singers;
}
//
// @Override
// public boolean equals(Object o) {
// if (this == o) return true;
// if (o == null || getClass() != o.getClass()) return false;
// Instrument that = (Instrument) o;
// return Objects.equals(instrumentId, that.instrumentId) &&
// Objects.equals(singers, that.singers);
// }
// @Override
// public int hashCode() {
// return Objects.hash(instrumentId, singers);
// }
@Override
public String toString() {
return "Instrument :" + getInstrumentId();
}
}
DBInitialize：
import javax.annotation.PostConstruct;
import java.util.Date;
import java.util.GregorianCalendar;
@Service
@Slf4j
public class DBInitialize {
@Autowired
private SingerRepository singerRepository;
@Autowired
private InstrumentRepository instrumentRepository;
@PostConstruct
public void initDB() {
log.info("Starting database initialization...");
Instrument guitar = new Instrument();
guitar.setInstrumentId("Guitar");
instrumentRepository.save(guitar);
Instrument piano = new Instrument();
piano.setInstrumentId("Piano");
instrumentRepository.save(piano);
Instrument voice = new Instrument();
voice.setInstrumentId("Voice");
instrumentRepository.save(voice);
Singer singer = new Singer();
singer.setFirstName("John");
singer.setLastName("Mayer");
singer.setBirthDay(new Date(
(new GregorianCalendar(1977, 9, 16)).getTime().getTime()));
singer.addInstrument(guitar);
singer.addInstrument(piano);
Album album1 = new Album();
album1.setTitle("The Search For Everything");
album1.setDateRelease(new java.sql.Date(
(new GregorianCalendar(2017, 0, 20)).getTime().getTime()));
singer.addAlbums(album1);
Album album2 = new Album();
album2.setTitle("Battle Studies");
album2.setDateRelease(new java.sql.Date(
(new GregorianCalendar(2009, 10, 17)).getTime().getTime()));
singer.addAlbums(album2);
singerRepository.save(singer);
singer = new Singer();
singer.setFirstName("Eric");
singer.setLastName("Clapton");
singer.setBirthDay(new Date(
(new GregorianCalendar(1945, 2, 30)).getTime().getTime()));
singer.addInstrument(guitar);
Album album = new Album();
album.setTitle("From The Cradle");
album.setDateRelease(new java.sql.Date(
(new GregorianCalendar(1994, 8, 13)).getTime().getTime()));
singer.addAlbums(album);
singerRepository.save(singer);
singer = new Singer();
singer.setFirstName("John");
singer.setLastName("Butler");
singer.setBirthDay(new Date(
(new GregorianCalendar(1975, 3, 1)).getTime().getTime()));
singer.addInstrument(guitar);
singerRepository.save(singer);
log.info("Database initialization finished.");
}
}
当我运行它会抛出错误：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'DBInitialize': Invocation of init method failed; nested exception is org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint ["PRIMARY_KEY_7 ON PUBLIC.INSTRUMENT(ID) VALUES ('Piano', 1)"; SQL statement:
insert into instrument (id) values (?) [23505-197]]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:139) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:419) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1737) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863) ~[spring-context-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at com.baotrung.springprofull.SpringProFullApplication.main(SpringProFullApplication.java:10) [classes/:na]
Caused by: org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint ["PRIMARY_KEY_7 ON PUBLIC.INSTRUMENT(ID) VALUES ('Piano', 1)"; SQL statement:
insert into instrument (id) values (?) [23505-197]]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:296) ~[spring-orm-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:253) ~[spring-orm-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:536) ~[spring-orm-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:746) ~[spring-tx-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:714) ~[spring-tx-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:533) ~[spring-tx-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:304) ~[spring-tx-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[spring-tx-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:135) ~[spring-data-jpa-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) ~[spring-aop-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61) ~[spring-data-commons-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at com.sun.proxy.$Proxy117.save(Unknown Source) ~[na:na]
at com.baotrung.springprofull.service.DBInitialize.initDB(DBInitialize.java:61) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:307) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
... 18 common frames omitted
Caused by: org.hibernate.exception.ConstraintViolationException: could not execute statement
at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:112) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:178) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3171) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3686) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:90) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:478) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:356) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1454) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:511) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3283) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2479) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:473) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:178) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:39) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:271) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:98) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:532) ~[spring-orm-5.1.3.RELEASE.jar:5.1.3.RELEASE]
... 42 common frames omitted
Caused by: org.h2.jdbc.JdbcSQLException: Unique index or primary key violation: "PRIMARY_KEY_7 ON PUBLIC.INSTRUMENT(ID) VALUES ('Piano', 1)"; SQL statement:
insert into instrument (id) values (?) [23505-197]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:357) ~[h2-1.4.197.jar:1.4.197]
at org.h2.message.DbException.get(DbException.java:179) ~[h2-1.4.197.jar:1.4.197]
at org.h2.message.DbException.get(DbException.java:155) ~[h2-1.4.197.jar:1.4.197]
at org.h2.index.BaseIndex.getDuplicateKeyException(BaseIndex.java:101) ~[h2-1.4.197.jar:1.4.197]
at org.h2.mvstore.db.MVSecondaryIndex.requireUnique(MVSecondaryIndex.java:236) ~[h2-1.4.197.jar:1.4.197]
at org.h2.mvstore.db.MVSecondaryIndex.add(MVSecondaryIndex.java:202) ~[h2-1.4.197.jar:1.4.197]
at org.h2.mvstore.db.MVTable.addRow(MVTable.java:732) ~[h2-1.4.197.jar:1.4.197]
at org.h2.command.dml.Insert.insertRows(Insert.java:182) ~[h2-1.4.197.jar:1.4.197]
at org.h2.command.dml.Insert.update(Insert.java:134) ~[h2-1.4.197.jar:1.4.197]
at org.h2.command.CommandContainer.update(CommandContainer.java:102) ~[h2-1.4.197.jar:1.4.197]
at org.h2.command.Command.executeUpdate(Command.java:261) ~[h2-1.4.197.jar:1.4.197]
at org.h2.jdbc.JdbcPreparedStatement.executeUpdateInternal(JdbcPreparedStatement.java:199) ~[h2-1.4.197.jar:1.4.197]
at org.h2.jdbc.JdbcPreparedStatement.executeUpdate(JdbcPreparedStatement.java:153) ~[h2-1.4.197.jar:1.4.197]
at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61) ~[HikariCP-3.2.0.jar:na]
at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java) ~[HikariCP-3.2.0.jar:na]
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:175) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
... 59 common frames omitted
我不明白为什么会出错，因为实体 Instrument 仅一个字段： instrumentId 。请帮我出错。 附： 我有一个不在本文讨论范围内的问题，如果我想从存储库中返回数据，则必须将DTO编写为返回它，而不使用实体。而且我必须手动编写或使用其他任何转换。请帮助