代码：
public class testHQL2 {
    public static void main(String[] args) {
        AbstractApplicationContext act= new ClassPathXmlApplicationContext("applicationContext.xml");
        ListDao listDao = (ListDao) act.getBean("ilistdao");
        
        String HQL = "SELECT new List(MB001,ISNULL((SELECT ISNULL(SUM(MC007),0) FROM INVMC WHERE MC001=MB001),'')) FROM INVMB B ";
        
        List<List<Object>> data = listDao.findByHQL(HQL, new Object[]{});
        if(data!=null && data.size()>0){
            for(int i=0;i<10;i++){
                System.out.println(data.get(i));
            }
        }
        System.out.println("END");
    }
}


错误提示：
java.lang.NullPointerException
    at org.hibernate.hql.NameGenerator.generateColumnNames(NameGenerator.java:46)
    at org.hibernate.hql.ast.util.SessionFactoryHelper.generateColumnNames(SessionFactoryHelper.java:409)
    at org.hibernate.hql.ast.tree.SelectClause.initializeColumnNames(SelectClause.java:269)
    at org.hibernate.hql.ast.tree.SelectClause.finishInitialization(SelectClause.java:259)
    at org.hibernate.hql.ast.tree.SelectClause.initializeExplicitSelectClause(SelectClause.java:253)
    at org.hibernate.hql.ast.HqlSqlWalker.useSelectClause(HqlSqlWalker.java:831)
    at org.hibernate.hql.ast.HqlSqlWalker.processQuery(HqlSqlWalker.java:619)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:672)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:288)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:231)
    at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254)
    at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)
    at org.hibernate.hql.ast.(QueryTranslatorImpl.java:136)
    at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
    at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
    at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:94)
    at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
    at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
    at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1651)
    at DAO.ListDaoImpl.findByHQL(ListDaoImpl.java:22)
    at testAnythings.testHQL2.main(testHQL2.java:17)