hibernate的一个异常错误分析

在开发中，经常会遇到修改数据模型的字段类型，或者添加字段，若是最后把该字段类型映射为boolean，就可能会出问题。
准确的说，若是该字段是空(不是Y或N，或者别的可以映射为boolean合理值)，并被映射为boolean的话，因为hibernate不知道怎么去映射该字段，然后hibernate就抛出下列异常(如下)，注意异常描述，看着这个错误信息，很难和错误原因联系起来

org.springframework.orm.hibernate3.HibernateSystemException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of com.company.project.domain.manage.AgentOfCenterCheckResult.setSubmit; nested exception is org.hibernate.PropertyAccessException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of com.company.project.domain.manage.AgentOfCenterCheckResult.setSubmit
org.hibernate.PropertyAccessException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of com.company.project.domain.manage.AgentOfCenterCheckResult.setSubmit
 at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValuesWithOptimizer(PojoEntityTuplizer.java:215)
 at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:185)
 at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3232)
 at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:129)
 at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:842)
 at org.hibernate.loader.Loader.doQuery(Loader.java:717)
 at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
 at org.hibernate.loader.Loader.doList(Loader.java:2145)
 at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
 at org.hibernate.loader.Loader.list(Loader.java:2024)
 at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
 at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533)
 at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
 at org.springframework.orm.hibernate3.HibernateTemplate$5.doInHibernate(HibernateTemplate.java:520)
 at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366)
 at org.springframework.orm.hibernate3.HibernateTemplate.loadAll(HibernateTemplate.java:516)
 at com.company.project.framework.BaseDAOImpl.list(BaseDAOImpl.java:92)
 at com.company.project.module.manage.dao.AgentOfCenterCheckResultDAOImplTest.testHibernateMap(AgentOfCenterCheckResultDAOImplTest.java:18)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at junit.framework.TestCase.runTest(TestCase.java:154)
 at junit.framework.TestCase.runBare(TestCase.java:127)
 at junit.framework.TestResult$1.protect(TestResult.java:106)
 at junit.framework.TestResult.runProtected(TestResult.java:124)
 at junit.framework.TestResult.run(TestResult.java:109)
 at junit.framework.TestCase.run(TestCase.java:118)
 at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)
 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: net.sf.cglib.beans.BulkBeanException
 at com.company.project.domain.manage.AgentOfCenterCheckResult$$BulkBeanByCGLIB$$174c0f99.setPropertyValues(<generated>)
 at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValuesWithOptimizer(PojoEntityTuplizer.java:212)
 ... 33 more
Caused by: java.lang.NullPointerException
 ... 35 more