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老师找不到实体 hql 映射不过去

这是错误代码：

十月 17, 2015 5:00:01 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator

INFO: HHH000046: Connection properties: {user=root, password=****}

十月 17, 2015 5:00:01 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator

INFO: HHH000006: Autocommit mode: false

十月 17, 2015 5:00:01 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000115: Hibernate connection pool size: 20 (min=1)

十月 17, 2015 5:00:01 下午 org.hibernate.dialect.Dialect <init>

INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect

十月 17, 2015 5:00:03 下午 org.hibernate.hql.internal.QueryTranslatorFactoryInitiator initiateService

INFO: HHH000397: Using ASTQueryTranslatorFactory

org.hibernate.hql.internal.ast.QuerySyntaxException: Users is not mapped [from Users as u where u.username=? and u.password=?]

at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:79)

at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103)

at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:218)

at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:142)

at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:115)

at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:76)

at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:150)

at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:298)

at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236)

at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1821)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:497)

at org.hibernate.context.internal.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:338)

at com.sun.proxy.$Proxy18.createQuery(Unknown Source)

at services.impl.UserDAOImpl.usersLogin(UserDAOImpl.java:26)

at service.impl.TestUsersDAOImpl.testUsersLogin(TestUsersDAOImpl.java:17)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:497)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)

at org.junit.runners.ParentRunner.run(ParentRunner.java:300)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: Users is not mapped

at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:171)

at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:91)

at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:76)

at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:320)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3678)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3567)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:708)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:564)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:301)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:249)

at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:262)

at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:190)

... 38 more

qq_Thanatos_0

2015-10-17

源自：使用Struts2+Hibernate开发学生信息管理功能 2-3

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小城阿哥回答被采纳 +3 积分
2015-10-19

org.hibernate.hql.internal.ast.QuerySyntaxException: Users is not mapped [from Users as u where u.username=? and u.password=?]

关键在这一句，出现这个问题的原因最大可能是Users.hbm.xml文件配置错误，或者Users.hbm.xml没有添加到hibernate.cfg.xml文件中

0 回复有任何疑惑可以回复我~

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幕布斯7555273
2018-08-27

问题已解决，可以参考：
    public static SessionFactory getSessionFactory(Class cl){

        if(sessionFactory==null){
            //5.0版本及以上
            StandardServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure().build();

            Metadata metadata = new MetadataSources(serviceRegistry).addAnnotatedClass(cl).buildMetadata();

            sessionFactory = metadata.getSessionFactoryBuilder().build();

//hibernate5.0以下版本的写法

//            // 默认读取hibernate.cfg.xml文件
//            Configuration config = new Configuration().configure();
//            //创建服务注册对象
//            //ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
//            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(config.getProperties()).build();
//            sessionFactory = config.buildSessionFactory(serviceRegistry);
            return sessionFactory;

        }else{

            return sessionFactory;
        }
    }

    public static SessionFactory getSessionFactory(Class cl){

        if(sessionFactory==null){
            //5.0版本及以上
            StandardServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure().build();

            Metadata metadata = new MetadataSources(serviceRegistry).addAnnotatedClass(cl).buildMetadata();

            sessionFactory = metadata.getSessionFactoryBuilder().build();

//hibernate5.0以下版本的写法

//            // 默认读取hibernate.cfg.xml文件
//            Configuration config = new Configuration().configure();
//            //创建服务注册对象
//            //ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
//            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(config.getProperties()).build();
//            sessionFactory = config.buildSessionFactory(serviceRegistry);
            return sessionFactory;

        }else{

            return sessionFactory;
        }
    }StandardServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure().build();

Metadata metadata = new MetadataSources(serviceRegistry).addAnnotatedClass(cl).buildMetadata();

sessionFactory = metadata.getSessionFactoryBuilder().build();