我是 JPA 和 hibernate 的初学者，我只是想通过 hibernate 从我的数据库中获取一些数据，但我失败了，我收到了这个错误:
Apr 29, 2019 5:14:28 AM org.hibernate.jpa.internal.util.LogHelper logPersistenceUnitInformation
INFO: HHH000204: Processing qPersistenceUnitInfo [name: NewPersistenceUnit]
Apr 29, 2019 5:14:29 AM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.4.2.Final}
Apr 29, 2019 5:14:29 AM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
Apr 29, 2019 5:14:30 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
Apr 29, 2019 5:14:30 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/shopping]
Apr 29, 2019 5:14:30 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {user=root, password=****}
Apr 29, 2019 5:14:30 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
Apr 29, 2019 5:14:30 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections <init>
INFO: HHH000115: Hibernate connection pool size: 20 (min=1)
Apr 29, 2019 5:14:32 AM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
Apr 29, 2019 5:14:33 AM org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection
INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@35e478f] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode.
Apr 29, 2019 5:14:33 AM org.hibernate.engine.transaction.jta.platform.internal.JtaPlatformInitiator initiateService
INFO: HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
Hibernate:
select
itemclass0_.id as id1_0_0_,
itemclass0_.author as author2_0_0_,
itemclass0_.available_amount as availabl3_0_0_,
itemclass0_.bought as bought4_0_0_,
itemclass0_.imageURL as imageURL5_0_0_,
itemclass0_.name as name6_0_0_,
itemclass0_.price as price7_0_0_,
itemclass0_.publish_time as publish_8_0_0_
from
item itemclass0_
where
itemclass0_.id=?
Apr 29, 2019 5:14:33 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 0, SQLState: S1009
Apr 29, 2019 5:14:33 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: MONTH
Apr 29, 2019 5:14:33 AM org.hibernate.event.internal.DefaultLoadEventListener doOnLoad
INFO: HHH000327: Error performing load command : org.hibernate.exception.GenericJDBCException: Could not read entity state from ResultSet : EntityKey[entities.ItemClass#58]
Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Could not read entity state from ResultSet : EntityKey[entities.ItemClass#58]
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
at org.hibernate.internal.SessionImpl.find(SessionImpl.java:3581)
at org.hibernate.internal.SessionImpl.find(SessionImpl.java:3519)
at Test.main(Test.java:17)
Caused by: org.hibernate.exception.GenericJDBCException: Could not read entity state from ResultSet : EntityKey[entities.ItemClass#58]
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)
at org.hibernate.loader.plan.exec.process.internal.EntityReferenceInitializerImpl.loadFromResultSet(EntityReferenceInitializerImpl.java:320)
at org.hibernate.loader.plan.exec.process.internal.EntityReferenceInitializerImpl.hydrateEntityState(EntityReferenceInitializerImpl.java:233)
at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.readRow(AbstractRowReader.java:103)
at org.hibernate.loader.plan.exec.internal.EntityLoadQueryDetails$EntityLoaderRowReader.readRow(EntityLoadQueryDetails.java:254)
at org.hibernate.loader.plan.exec.process.internal.ResultSetProcessorImpl.extractResults(ResultSetProcessorImpl.java:122)
at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:122)
at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:86)
at org.hibernate.loader.entity.plan.AbstractLoadPlanBasedEntityLoader.load(AbstractLoadPlanBasedEntityLoader.java:197)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:4279)
at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:482)
at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:452)
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:203)
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:262)
at org.hibernate.event.internal.DefaultLoadEventListener.doOnLoad(DefaultLoadEventListener.java:105)
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:73)
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1287)
at org.hibernate.internal.SessionImpl.access$2100(SessionImpl.java:212)
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.doLoad(SessionImpl.java:2930)
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.lambda$load$1(SessionImpl.java:2911)
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.perform(SessionImpl.java:2867)
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2911)
at org.hibernate.internal.SessionImpl.find(SessionImpl.java:3552)
... 2 more
Caused by: java.sql.SQLException: MONTH
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:85)
at com.mysql.cj.jdbc.result.ResultSetImpl.getDate(ResultSetImpl.java:847)
at com.mysql.cj.jdbc.result.ResultSetImpl.getDate(ResultSetImpl.java:860)
at org.hibernate.type.descriptor.sql.DateTypeDescriptor$2.doExtract(DateTypeDescriptor.java:76)
at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:47)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:257)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:253)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:243)
at org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:329)
at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:3014)
at org.hibernate.loader.plan.exec.process.internal.EntityReferenceInitializerImpl.loadFromResultSet(EntityReferenceInitializerImpl.java:305)
... 23 more
Caused by: com.mysql.cj.exceptions.WrongArgumentException: MONTH
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
at com.mysql.cj.result.SqlDateValueFactory.createFromDate(SqlDateValueFactory.java:80)
at com.mysql.cj.result.SqlDateValueFactory.createFromDate(SqlDateValueFactory.java:46)
at com.mysql.cj.result.BaseDecoratingValueFactory.createFromDate(BaseDecoratingValueFactory.java:53)
at com.mysql.cj.result.BaseDecoratingValueFactory.createFromDate(BaseDecoratingValueFactory.java:53)
at com.mysql.cj.protocol.a.MysqlTextValueDecoder.decodeDate(MysqlTextValueDecoder.java:72)
at com.mysql.cj.protocol.result.AbstractResultsetRow.decodeAndCreateReturnValue(AbstractResultsetRow.java:90)
at com.mysql.cj.protocol.result.AbstractResultsetRow.getValueFromBytes(AbstractResultsetRow.java:250)
at com.mysql.cj.protocol.a.result.ByteArrayRow.getValue(ByteArrayRow.java:91)
at com.mysql.cj.jdbc.result.ResultSetImpl.getNonStringValueFromRow(ResultSetImpl.java:656)
at com.mysql.cj.jdbc.result.ResultSetImpl.getDateOrTimestampValueFromRow(ResultSetImpl.java:679)
... 33 more
Caused by: java.lang.IllegalArgumentException: MONTH
at java.util.GregorianCalendar.computeTime(GregorianCalendar.java:2648)
at java.util.Calendar.updateTime(Calendar.java:3393)
at java.util.Calendar.getTimeInMillis(Calendar.java:1782)
at com.mysql.cj.result.SqlDateValueFactory.createFromDate(SqlDateValueFactory.java:77)
... 42 more
Process finished with exit code 1
而且publish_time 列的类型是日期。
持久性.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
<persistence-unit name="NewPersistenceUnit">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>entities.ItemClass</class>
<properties>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/shopping"/>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.username" value="root"/>
<property name="hibernate.connection.password" value="expectopatronum"/>
<property name="hibernate.archive.autodetection" value="class"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
</properties>
</persistence-unit>
</persistence>
这是我的实体类
ItemClass.java
package entities;
import javax.persistence.*;
import java.sql.Date;
import java.util.Objects;
@Entity
@Table(name = "item", schema = "shopping", catalog = "")
public class ItemClass {
private int id;
private String name;
private Integer price;
private String imageUrl;
private Integer availableAmount;
private Integer bought;
@Temporal(TemporalType.TIMESTAMP)
private Date publishTime;
private String author;
@Id
@Column(name = "id", nullable = false)
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@Basic
@Column(name = "name", nullable = false, length = 45)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Basic
@Column(name = "price", nullable = true)
public Integer getPrice() {
return price;
}
public void setPrice(Integer price) {
this.price = price;
}
@Basic
@Column(name = "imageURL", nullable = true, length = 45)
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
@Basic
@Column(name = "available_amount", nullable = true)
public Integer getAvailableAmount() {
return availableAmount;
}
public void setAvailableAmount(Integer availableAmount) {
this.availableAmount = availableAmount;
}
@Basic
@Column(name = "bought", nullable = true)
public Integer getBought() {
return bought;
}
public void setBought(Integer bought) {
this.bought = bought;
}
@Basic
@Column(name = "publish_time", nullable = true)
public Date getPublishTime() {
return publishTime;
}
public void setPublishTime(Date publishTime) {
this.publishTime = publishTime;
}
@Basic
@Column(name = "author", nullable = false, length = 45)
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ItemClass itemClass = (ItemClass) o;
return id == itemClass.id &&
Objects.equals(name, itemClass.name) &&
Objects.equals(price, itemClass.price) &&
Objects.equals(imageUrl, itemClass.imageUrl) &&
Objects.equals(availableAmount, itemClass.availableAmount) &&
Objects.equals(bought, itemClass.bought) &&
Objects.equals(publishTime, itemClass.publishTime) &&
Objects.equals(author, itemClass.author);
}
@Override
public int hashCode() {
return Objects.hash(id, name, price, imageUrl, availableAmount, bought, publishTime, author);
}
}
测试.java
import entities.ItemClass;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
public class Test {
public static void main(String[] args) {
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("NewPersistenceUnit");
EntityManager entityManager = entityManagerFactory.createEntityManager();
ItemClass item = entityManager.find(ItemClass.class,58);
System.out.println(item.getAuthor());
}
}
我查看了与我的标题类似的另一个问题，但没有帮助。
任何人都可以帮我解决这个问题吗？
更新
这些是我的带有 publish_time 列的行:
My Table
最佳答案
这可能是数据问题(在数据库表中)。
mysql 表可以包含日期时间/时间戳条目，如 2019-00-00 .虽然这些日期在 mysql 中是有效的(取决于服务器版本和模式)，但当 mysql 驱动程序尝试将它们解析为 Java 日期时，它们将导致异常。
仔细检查您尝试检索的行在 publish_time 中是否具有有效日期。柱子。
附:如果您的日期全部为零( 0000-00-00 00:00:00 )，那么您可以使用 zeroDateTimeBehavior连接字符串中的属性，以便在不更改数据库值的情况下更优雅地处理它们。
关于java - hibernate :无法从 ResultSet 和 IllegalArgumentException:GregorianCalendar.computeTime 读取实体状态，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55895887/