log4j:WARN   No   appenders   could   be   found   for   logger   (org.hibernate.cfg.Environment).
log4j:WARN   Please   initialize   the   log4j   system   properly.
Hibernate:   insert   into   myusertable   (username,   password,   email,   id)   values   (?,   ?,   ?,   ?)
org.hibernate.exception.GenericJDBCException:   could   not   insert:   [hyq03.hibernate.User]
at   org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
at   org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
at   org.hibernate.exception.
JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at   org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:40)
at   org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
at   org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
at   org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
at   org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
at   org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
at   org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
at   org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
at   org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at   org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at   org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at   org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at   org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at   org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at   org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at   org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at   hyq03.hibernate.Test.main(Test.java:21)
Caused   by:
java.sql.SQLException:   Statement   parameter   4   not   set.
at   com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1031)
at   com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:676)
at   com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1166)
at   com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1082)
at   com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1067)
at   org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73)
at   org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33)
...   16   more

<?xml   version= "1.0 "   encoding= "UTF-8 "?>
<!DOCTYPE   hibernate-configuration   PUBLIC
"-//Hibernate/Hibernate   configuration   DTD   3.0//EN "

--转自