我有一个具有以下属性的持久Book类
到目前为止一切似乎都很好,但是当我尝试获取表中的所有值时,我得到以下异常消息:
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
我正在运行的代码是:
会话会话= SessionFactoryHandler.buildIfNeeded()。 的openSession();
Criteria crit = session.createCriteria( Book.class );
crit.list();
session.close();
SessionFactoryHandler.closeFactory();
据我所知,它发生在 status 属性上我只是不知道为什么,如果我在xml中注释map属性它完美地运行但是它会抛出相同的异常相同的索引57,它没有区别数据库中该列的值(只有一个注册表)。
映射文件如下:
<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>
有什么想法吗?
答案 0 :(得分:5)
从我看到你试图将数据库中的BIT类型映射到你的休眠代码中的布尔值。
从版本5.0.3开始,MySQL中存在BIT值的错误,因为它不存储单个BIT值。它存储类似SET或ENUM的东西。当您进行数值比较时,这通常会引发问题。有关详细信息,请点击此处
http://www.xaprb.com/blog/2006/04/11/bit-values-in-mysql/
您可以要求您的DBA将数据类型更改为tinyint,但是如果不可能,您可以将状态映射从boolean更改为numeric_boolean,这样就像
<property name="status" column="book_status" type="numeric_boolean" not-null="true"/>
答案 1 :(得分:3)
有两种方法可以实现属性
的类型转换使用Type
@Type(type = "yes_no")
private boolean isActive;
数据库Y / N中的将保持不变。
通过编写转换器
@Column
@Convert(converter = BooleanConverter.class)
private boolean isActive;
转换器类
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;
}
}
<\ n>在xml中,您可以使用转换器类名称替换type
属性或yes_no
<property name="status" column="book_status" type="yes_no" not-null="true"/>