Erro de mapeamento

run:

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).

log4j:WARN Please initialize the log4j system properly.

Initializing c3p0 pool… com.mchange.v2.c3p0.PoolBackedDataSource@8f4fb3 [ connectionPoolDataSource -> com.mchange.v2.c3p0.WrapperConnectionPoolDataSource@bb7465 [ acquireIncrement -> 2, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, idleConnectionTestPeriod -> 3000, initialPoolSize -> 2, maxIdleTime -> 5000, maxPoolSize -> 10, maxStatements -> 10, maxStatementsPerConnection -> 0, minPoolSize -> 2, nestedDataSource -> com.mchange.v2.c3p0.DriverManagerDataSource@12f0999 [ description -> null, driverClass -> null, factoryClassLocation -> null, jdbcUrl -> jdbc:mysql://localhost/banco?autoReconnect=true, properties -> {user=******, password=******} ] , preferredTestQuery -> null, propertyCycle -> 300, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, usesTraditionalReflectiveProxies -> false ] , factoryClassLocation -> null, numHelperThreads -> 3, poolOwnerIdentityToken -> 8f4fb3 ]

org.hibernate.PropertyNotFoundException: Could not find a getter for alunos in class Turma

at org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:213)

at org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:207)

at org.hibernate.mapping.Property.getGetter(Property.java:240)

at org.hibernate.tuple.PojoTuplizer.buildPropertyGetter(PojoTuplizer.java:237)

at org.hibernate.tuple.AbstractTuplizer.(AbstractTuplizer.java:73)

at org.hibernate.tuple.PojoTuplizer.(PojoTuplizer.java:54)

at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:47)

at org.hibernate.tuple.EntityMetamodel.(EntityMetamodel.java:218)

at org.hibernate.persister.entity.BasicEntityPersister.(BasicEntityPersister.java:400)

at org.hibernate.persister.entity.SingleTableEntityPersister.(SingleTableEntityPersister.java:104)

at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)

at org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:211)

at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1005)

at HibernateUtility.(HibernateUtility.java:21)

at Teste.main(Teste.java:16)

Exception in thread “main” java.lang.NullPointerException

at HibernateUtility.getSession(HibernateUtility.java:30)

at Teste.main(Teste.java:16)

Java Result: 1

BUILD SUCCESSFUL (total time: 9 seconds)