public PageBean pageSelect(Class clazz,Map map, int pageNo, int pageSize) {
Criteria c = this.getSession().createCriteria(Class.class);
if(map !=null){
Set<String> keys =map.keySet();
for(String key :keys){
c.add(Restrictions.like(key, map.get(key)));
}
}
System.out.println("计算总条数前");
int rowCount =(Integer) c.setProjection(Projections.rowCount()).uniqueResult(); //根据条件查询出来的记录数
System.out.println(rowCount);
System.out.println("计算总条数后");
这一句报空指针int rowCount =(Integer) c.setProjection(Projections.rowCount()).uniqueResult();