令人吐血的Hibernate多对多删除约束。。。。

我的Good类public class Good implements Serializable {

private String goodId ;
         private Set<Businessman> businessmen;}我的Businessman类
public class Businessman implements Serializable {
private String businessmanId;
         private Set<Good> goods;
}Hibernate相关属性的配置
<id name="goodId">
    <generator class="uuid"></generator>
</id><set name="businessmen" table="t_goods_businessman" inverse="false" cascade="none" lazy="false">
    <key column="goodId"></key>
    <many-to-many class="Businessman" column="businessmanId"></many-to-many>
</set>-----------------------------------------------------------------------------------<id name="businessmanId">
     <generator class="uuid"></generator>
</id>
<set name="goods" table="t_goods_businessman" lazy="false" cascade="none" inverse="true">
    <key column="businessmanId"></key>
    <many-to-many class="Good" column="GoodId"></many-to-many>
</set>
现在情况是，无论我如何配置Hiberinate的配置文件，特别是cascade，无论配置成什么都没什么用。
删除的时候总是出错，我的相关的删除语句是：
//第一步，先移除他们的关系
this.getHibernateTemplate().execute(new HibernateCallback(){
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
// TODO Auto-generated method stub
Good gd=(Good)session.get(Good.class,goodId);
Set<Businessman> set=gd.getBusinessmen();
Object[] oo=set.toArray();
                               //下面这句的意思是，Good相关的BusinessmanSet的第一项就是他的商家，而且set只有这么一项
Businessman bs=(Businessman)oo[0];
bs.getGoods().remove(gd);
session.update(bs);
gd.setBusinessmen(null);
return null;
}
});
//第二步，在进行相关的删除
this.getHibernateTemplate().execute(new HibernateCallback(){ public Object doInHibernate(Session session)
throws HibernateException, SQLException {
// TODO Auto-generated method stub
String hql="delete from Good where goodId=?";
Query query=session.createQuery(hql);
query.setString(0, goodId);
query.executeUpdate();
return null;
}
});恶心的是，无论我如果删除，写了各种各样的删除语句，都没有删除成功！这是异常：Cannot delete or update a parent row: a foreign key constraint fails (`zone`.`t_goods_businessman`, CONSTRAINT `FKDF84A726AD48347A` FOREIGN KEY (`GoodId`) REFERENCES `t_good` (`goodId`))
org.springframework.dao.DataIntegrityViolationException: could not execute update query; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute update query
Caused by: org.hibernate.exception.ConstraintViolationException: could not execute update query
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.hql.ast.exec.BasicExecutor.execute(BasicExecutor.java:84)
at org.hibernate.hql.ast.QueryTranslatorImpl.executeUpdate(QueryTranslatorImpl.java:396)
at org.hibernate.engine.query.HQLQueryPlan.performExecuteUpdate(HQLQueryPlan.java:259)
at org.hibernate.impl.SessionImpl.executeUpdate(SessionImpl.java:1141)
at org.hibernate.impl.QueryImpl.executeUpdate(QueryImpl.java:94)
at com.hd.daoimp.GoodDaoImp$15.doInHibernate(GoodDaoImp.java:442)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:372)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:338)
at com.hd.daoimp.GoodDaoImp.deleteGoodByGoodId(GoodDaoImp.java:434)
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:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy16.deleteGoodByGoodId(Unknown Source)
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:597)
at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:740)
at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:744)
at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:593)
at org.directwebremoting.dwrp.BaseCallHandler.handle(BaseCallHandler.java:90)
at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:120)
at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:141)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails (`zone`.`t_goods_businessman`, CONSTRAINT `FKDF84A726AD48347A` FOREIGN KEY (`GoodId`) REFERENCES `t_good` (`goodId`))
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2019)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1937)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1922)
at org.hibernate.hql.ast.exec.BasicExecutor.execute(BasicExecutor.java:75)
... 43 more