###struts模型驱动(必须new)能够封装【对象类型属性的属性】.页面传参错误导致的问题：HTTP Status 500

问题详情：

HTTP Status 500 - could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statementtype Exception reportmessage could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statementdescription The server encountered an internal error that prevented it from fulfilling this request.exceptionorg.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statementorg.springframework.orm.hibernate5.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:164)org.springframework.orm.hibernate5.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:741)org.springframework.orm.hibernate5.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:589)org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761)org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730)org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:485)org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291)org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)com.sun.proxy.$Proxy27.save(Unknown Source)cn.itcast.crm.action.LinkManAction.save(LinkManAction.java:91)sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)java.lang.reflect.Method.invoke(Unknown Source)ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:870)ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1293)ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117)com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108)ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1369)ognl.ASTMethod.getValueBody(ASTMethod.java:90)ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)ognl.SimpleNode.getValue(SimpleNode.java:258)ognl.Ognl.getValue(Ognl.java:494)ognl.Ognl.getValue(Ognl.java:458)com.opensymphony.xwork2.ognl.OgnlUtil$2.execute(OgnlUtil.java:309)com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecute(OgnlUtil.java:340)com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:307)com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:423)com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:287)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:250)org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564)org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)root causeorg.hibernate.exception.ConstraintViolationException: could not execute statementorg.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:59)org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109)org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:95)org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:207)org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:45)org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3071)org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2950)org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3330)org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:145)org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:560)org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:434)org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337)org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1282)org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:465)org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:2963)org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2339)org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:485)org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:147)org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38)org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:231)org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:65)org.springframework.orm.hibernate5.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:581)org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761)org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730)org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:485)org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291)org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)com.sun.proxy.$Proxy27.save(Unknown Source)cn.itcast.crm.action.LinkManAction.save(LinkManAction.java:91)sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)java.lang.reflect.Method.invoke(Unknown Source)ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:870)ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1293)ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117)com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108)ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1369)ognl.ASTMethod.getValueBody(ASTMethod.java:90)ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)ognl.SimpleNode.getValue(SimpleNode.java:258)ognl.Ognl.getValue(Ognl.java:494)ognl.Ognl.getValue(Ognl.java:458)com.opensymphony.xwork2.ognl.OgnlUtil$2.execute(OgnlUtil.java:309)com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecute(OgnlUtil.java:340)com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:307)com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:423)com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:287)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:250)org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564)org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)root causecom.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'lkm_cust_id' cannot be nullsun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)java.lang.reflect.Constructor.newInstance(Unknown Source)com.mysql.jdbc.Util.handleNewInstance(Util.java:406)com.mysql.jdbc.Util.getInstance(Util.java:381)com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554)com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1761)com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2046)com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1964)com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1949)com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:147)org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204)org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:45)org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3071)org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2950)org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3330)org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:145)org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:560)org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:434)org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337)org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1282)org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:465)org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:2963)org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2339)org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:485)org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:147)org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38)org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:231)org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:65)org.springframework.orm.hibernate5.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:581)org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761)org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730)org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:485)org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291)org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)com.sun.proxy.$Proxy27.save(Unknown Source)cn.itcast.crm.action.LinkManAction.save(LinkManAction.java:91)sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)java.lang.reflect.Method.invoke(Unknown Source)ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:870)ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1293)ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117)com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108)ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1369)ognl.ASTMethod.getValueBody(ASTMethod.java:90)ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)ognl.SimpleNode.getValue(SimpleNode.java:258)ognl.Ognl.getValue(Ognl.java:494)ognl.Ognl.getValue(Ognl.java:458)com.opensymphony.xwork2.ognl.OgnlUtil$2.execute(OgnlUtil.java:309)com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecute(OgnlUtil.java:340)com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:307)com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:423)com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:287)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:250)org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564)org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)note The full stack trace of the root cause is available in the Apache Tomcat/7.0.52 logs.

###struts模型驱动能够封装 对象类型属性的属性  到当前对象.

######(多对一 多的一方)对象属性 表单项name的取值(请求参数传值格式):【对象属性名.对象属性的属性值】.

例子:添加联系人（有个单对象属性customer()所属客户）

====客户：字典  是 多对一。也是一样。 添加客户，客户回显字典，add.jsp也要 填写 客户实体类的字典属性.字典id.

页面代码：###

<tr><td>所属客户：</td><td colspan="3"><!-- <input type="text" name="custId" value="1" style="WIDTH: 180px"/> --><!-- ===模型驱动很强大：会自动把对象属性的属性值封装。 --><select name="customer.custId" id="cust" style="WIDTH: 180px" type="text"><!-- <select name="custId" id="cust" style="WIDTH: 180px" type="text"> ===报错--></select></td></tr>

补充：

联系人：

@Entity@Table(name="cst_linkman")public class LinkMan {@Id@Column(name="lkm_id")@GeneratedValue(strategy=GenerationType.IDENTITY)private Long lkmId;//`lkm_name` varchar(16) DEFAULT NULL COMMENT '联系人姓名',//  `lkm_gender` char(1) DEFAULT NULL COMMENT '联系人性别',//  `lkm_phone` varchar(16) DEFAULT NULL COMMENT '联系人办公电话',//  `lkm_mobile` varchar(16) DEFAULT NULL COMMENT '联系人手机',//  `lkm_email` varchar(64) DEFAULT NULL COMMENT '联系人邮箱',//  `lkm_position` varchar(16) DEFAULT NULL COMMENT '联系人职位',//  `lkm_memo` varchar(512) DEFAULT NULL COMMENT '联系人备注',//  `lkm_cust_id` bigint(32) NOT NULL COMMENT '客户id(外键)',@Column(name="lkm_name")private String lkmName;@Column(name="lkm_gender")private String lkmGender;@Column(name="lkm_phone")private String lkmPhone;@Column(name="lkm_mobile")private String lkmMobile;@Column(name="lkm_email")private String lkmEmail;@Column(name="lkm_position")private String lkmPostion;@Column(name="lkm_memo")private String lkmMemo;@ManyToOne()//==###=没有mappedBy属性==【不需要 targetEntity，这里封装过，通过属性类型也能获取到映射的类型】@JoinColumn(name="lkm_cust_id")//===外键。private Customer customer;

LinkManAction：==###=【模型驱动很强大：能够封装linkMan的customer属性中的custId属性值  到customer属性】

@Controller@Scope("prototype")@ParentPackage("struts-default")@Namespace("/")public class LinkManAction extends ActionSupport implements ModelDriven<LinkMan>{private LinkMan linkMan = new LinkMan();@Overridepublic LinkMan getModel() {return linkMan;}