org.hibernate.hql.internal.ast.QuerySyntaxException：表未映射
我正在尝试学习使用MySQL使用Hibernate，我从来没有使用过它之前和之后的一系列错误我终于得到了这个：
Exception in thread "main" org.hibernate.hql.internal.ast.QuerySyntaxException: country is not mapped [from country] 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:3291) at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3180) 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.(HQLQueryPlan.java:105) at org.hibernate.engine.query.spi.HQLQueryPlan.(HQLQueryPlan.java:80) at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168) at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:221) at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:199) at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1735) at org.hibernate.tutorial.hbm.Test.main(Test.java:37) 我尝试过另一个问题的可能解决方案，但没有，它不起作用。 这是我到目前为止所做的：
hibernate.cfg.xml （Folder src）
com.mysql.jdbc.Driver jdbc:mysql://localhost:3306/stock root root 1 org.hibernate.dialect.MySQLDialect true true create 1 3600 3 5 0 3605 select 1; <!-- -->
country.hbm.xml （Folder * src \ main \ resources \ org \ hibernate \ tutorial \ hbm * ）
country.java
package org.hibernate.tutorial.hbm; public class country { private int id_country; private String country; public int getId_country() { return id_country; } public void setId_country(int id_country) { this.id_country = id_country; } public String getCountry() { return country; } public void setCountry(String country) { this.country = country; } }
Test.java
package org.hibernate.tutorial.hbm; import java.util.List; import org.hibernate.SessionFactory; import org.hibernate.Session; //import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import org.hibernate.tutorial.hbm.country; /* required for test function only */ public class Test { private static final SessionFactory sessionFactory; static { try { // Initialize factory using contents of hibernate.cfg.xml sessionFactory = new Configuration().configure().buildSessionFactory(); } catch (Throwable ex) { System.err.println("Initial SessionFactory creation failed." + ex); throw new ExceptionInInitializerError(ex); } } public static SessionFactory getSessionFactory() { return sessionFactory; } public static void main (String[] args) { country mycls = new country(); /* the id field will auto-increment to a unique value which will distinguish records */ //mycls.setCountry("My Property"); Session session = sessionFactory.openSession(); session.beginTransaction(); List result = session.createQuery( "from country" ).list(); for ( country ctry : (List) result ) { System.out.println( "Country (" + ctry.getId_country() + ") : " + ctry.getCountry() ); } session.getTransaction().commit(); session.close(); /* if this test succeeds, you'll find a new record in your MySQL database */ } }
– 编辑20130301
我已经改变了你的建议几件事
的hibernate.cfg.xml
我重命名并移动了文件Country.hbm.xml（它是country.hbm.xml）并更改了它
<!-- -->
该文件已移至src \ org \ hibernate \ tutorial \ hbm
class country.java已重命名为Country.java
最后，这一行在Test.java中进行了修改
List result = session.createQuery( "from Country" ).list(); for ( Country ctry : (List) result ) { System.out.println( "Country (" + ctry.getId_country() + ") : " + ctry.getCountry() ); }
现在我认为这是一个错误
Initial SessionFactory creation failed.org.hibernate.InvalidMappingException: Could not parse mapping document from resource org/hibernate/tutorial/hbm/Country.hbm.xml Exception in thread "main" java.lang.ExceptionInInitializerError at org.hibernate.tutorial.hbm.Test.(Test.java:21) Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from resource org/hibernate/tutorial/hbm/Country.hbm.xml at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:3423) at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXmlQueue(Configuration.java:3412) at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3400) at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1330) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1730) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1781) at org.hibernate.tutorial.hbm.Test.(Test.java:18) Caused by: org.hibernate.MappingException: class Country not found while looking for property: id_country at org.hibernate.internal.util.ReflectHelper.reflectedPropertyClass(ReflectHelper.java:232) at org.hibernate.mapping.SimpleValue.setTypeUsingReflection(SimpleValue.java:324) at org.hibernate.cfg.HbmBinder.bindSimpleId(HbmBinder.java:449) at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:382) at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:322) at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:173) at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:3420) ... 6 more Caused by: java.lang.ClassNotFoundException: Country at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at org.hibernate.internal.util.ReflectHelper.classForName(ReflectHelper.java:192) at org.hibernate.internal.util.ReflectHelper.reflectedPropertyClass(ReflectHelper.java:228) ... 12 more
我感谢您的帮助。 谢谢。
您的country.hbm.xml格式不正确：
是一个开放的标签，永远不会关闭。 我怀疑你的意思是：
（注意结束斜线）。
然后（正如@RameshK指出的那样），你必须添加
到您的hibernate.cfg.xml文件。
一个小问题：根据正常的编码约定，Java中的类是大写的，所以我将country改为Country 。
我终于解决了这个问题，在编辑了答案中的所有内容之后，我将Country.hbm.xml文件修改为:(注意注释行）
它必须是org.hibernate.tutorial.hbm.Country而不是org.hibernate.tutorial.hbm.country