Hibernate问题处理方法_at org.hibernate.hql.internal.namegenerator.genera-优快云博客

本文链接：https://blog.youkuaiyun.com/tony_lql/article/details/22876173

本文详细解析了在使用Hibernate进行HQL查询时遇到的TEstisnotmapped[fromTEst]错误原因及解决方法，通过对比不同配置文件中的类名与映射关系，指导开发者如何正确映射实体类与数据库表，避免此类错误的发生。

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各类问题处理方法

1、 org.hibernate.hql.internal.ast.QuerySyntaxException: TEst is not mapped [from TEst]

at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:180)
at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:110)
at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:93)
at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:324)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3270)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3159)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:706)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:562)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:248)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:183)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:105)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168)
at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:219)
at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:197)
at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1736)
at com.tony.Dao.TestQuery.main(TestQuery.java:21)

TEst is not mapped [from TEst]问题的原因是下面2张图片里面的名称不一样

2、Oracle

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.tony.Dao">
    <class name="Test" table="TEST" schema="HGMD">
            <id name="id" type="java.lang.Integer">
                <column name="ID" precision="22" scale="0" />
            </id>
            <property name="name" type="java.lang.String">
                <column name="NAME" length="20" />
            </property>
            <property name="ager" type="java.lang.Integer">
                <column name="AGER" precision="22" scale="0" />
            </property>
    </class>
</hibernate-mapping>

3、sqlservice

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.tony.demo">
    <class name="Hrm" table="hrm" schema="dbo" catalog="test">
            <id name="id" type="java.lang.Integer">
                <column name="id" />
            </id>
            <property name="name" type="java.lang.String">
                <column name="name" length="10" />
            </property>
            <property name="age" type="java.lang.Integer">
                <column name="age" />
            </property>
    </class>
</hibernate-mapping>