[英]Erroneous Boolean Mapping Hibernate (ArrayIndexOutOfBoundsException)
我有一個具有以下屬性的持久書類:
到目前為止,一切似乎都不錯,但是當我嘗試獲取表中的所有值時,我收到以下異常消息:
20:04:43,832 TRACE BasicExtractor:61 - extracted value ([classifi1_1_0_] : [BIGINT]) - [11]
20:04:43,832 TRACE BasicExtractor:61 - extracted value ([collecti1_2_1_] : [BIGINT]) - [11]
20:04:43,833 TRACE BasicExtractor:61 - extracted value ([book_id1_0_2_] : [BIGINT]) - [1]
20:04:43,839 TRACE BasicExtractor:61 - extracted value ([classifi2_1_0_] : [VARCHAR]) - [Prueba]
20:04:43,841 TRACE BasicExtractor:61 - extracted value ([collecti2_2_1_] : [VARCHAR]) - [Prueba]
20:04:43,841 TRACE BasicExtractor:61 - extracted value ([book_tit2_0_2_] : [LONGVARCHAR]) - [Libro de Prueba (No Existe) ]
20:04:43,842 TRACE BasicExtractor:61 - extracted value ([book_aut3_0_2_] : [LONGVARCHAR]) - [Jonathan Pichardo]
20:04:43,842 TRACE BasicExtractor:61 - extracted value ([book_sys4_0_2_] : [BIGINT]) - [190996]
java.lang.ArrayIndexOutOfBoundsException: 57
at com.mysql.cj.mysqla.MysqlaUtils.bitToLong(MysqlaUtils.java:68)
at com.mysql.cj.core.io.MysqlTextValueDecoder.decodeBit(MysqlTextValueDecoder.java:231)
at com.mysql.cj.jdbc.ResultSetRow.decodeAndCreateReturnValue(ResultSetRow.java:170)
at com.mysql.cj.jdbc.ResultSetRow.getValueFromBytes(ResultSetRow.java:269)
at com.mysql.cj.jdbc.BufferRow.getValue(BufferRow.java:349)
at com.mysql.cj.jdbc.ResultSetImpl.getNonStringValueFromRow(ResultSetImpl.java:813)
at com.mysql.cj.jdbc.ResultSetImpl.getBoolean(ResultSetImpl.java:904)
at com.mysql.cj.jdbc.ResultSetImpl.getBoolean(ResultSetImpl.java:908)
at org.hibernate.type.descriptor.sql.BooleanTypeDescriptor$2.doExtract(BooleanTypeDescriptor.java:59)
at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:47)
等等等
我正在運行的代碼是:
會話會話= SessionFactoryHandler.buildIfNeeded()。 openSession();
Criteria crit = session.createCriteria( Book.class );
crit.list();
session.close();
SessionFactoryHandler.closeFactory();
據我了解,這是在status屬性上發生的,我只是不知道為什么,如果我在xml中注釋映射屬性,則它可以正常工作,但是使用它,它總是使用相同的索引57拋出相同的異常,這不會使數據庫(僅具有一個注冊表)中該列的值之間的差異。
映射文件如下所示:
<hibernate-mapping package="com.cetys.librarymanagement">
<class name="com.cetys.librarymanagement.Core.DomainModels.Book" table="book">
<meta attribute="class-description">
This class contains the whole description of a Book,
according to the specification in ALTAIR system.
</meta>
<id name="id" type="long" column="book_id">
</id>
<property name="title" column="book_title" type="text" length="500" not-null="true"/>
<property name="author" column="book_author" type="text" not-null="true"/>
<property name="systemId" column="book_system_id" type="long" not-null="true"/>
<property name="status" column="book_status" type="boolean" not-null="true"/>
<property name="fullClassification" column="book_full_classification"
type="string" not-null="true"/>
<many-to-one name="classification" column="classification_id"
class="com.cetys.librarymanagement.Core.DomainModels.Classification" not-null="true"
unique="false" cascade="save-update" fetch="join"/>
<many-to-one name="collection" column="collection_id"
class="com.cetys.librarymanagement.Core.DomainModels.Collection" not-null="false"
unique="false" cascade="save-update" fetch="join"/>
</class>
</hibernate-mapping>
有任何想法嗎?
據我所知,您正在嘗試將休眠代碼中Database中的BIT類型映射為Boolean。
從5.0.3版開始,MySQL中存在一個BIT值錯誤,因為它不存儲單個BIT值。 它存儲諸如SET或ENUM之類的東西。 當您進行數值比較時,通常會引發問題。 欲了解更多詳情,請點擊這里
http://www.xaprb.com/blog/2006/04/11/bit-values-in-mysql/
您可以要求您的DBA將數據類型更改為tinyint,但是,如果不能這樣做,則可以將狀態映射從boolean更改為numeric_boolean,因此類似
<property name="status" column="book_status" type="numeric_boolean" not-null="true"/>
有兩種方法可以實現屬性的類型轉換
通過使用Type
注釋字段
@Type(type = "yes_no")
private boolean isActive;
DB中的Y / N將持續存在。
通過編寫轉換器
@Column
@Convert(converter = BooleanConverter.class)
private boolean isActive;
轉換器類
public class BooleanConverter implements AttributeConverter<Boolean, Character> {
@Override
public Character convertToDatabaseColumn(Boolean attribute) {
if (attribute)
return 'Y';
else
return 'N';
}
@Override
public Boolean convertToEntityAttribute(Character dbData) {
if ('Y' == dbData)
return true;
else
return false;
}
}
在xml中,您可以將type
屬性替換為轉換器類名稱或yes_no
<property name="status" column="book_status" type="yes_no" not-null="true"/>
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