Hibernate使用Criteria分页关联查询去除重复

    这里面role和user是多对多关系，比如一页显示15条数据，查询时查出来的user是15条，但是一旦有user对应多个role，这样显示的就没有15条数据了，在查询中单单加入
executableCriteria.setResultTransforme(Criteria.DISTINCT_ROOT_ENTITY);
这一句是不够的，这样只是查出15条数据，然后再去除重复的项，显示效果还是不对。
User类
@ManyToMany(fetch = FetchType.LAZY, cascade = { CascadeType.PERSIST,
CascadeType.MERGE, CascadeType.REFRESH })

@JoinTable(name = "system_user_role", joinColumns = @JoinColumn(name = "user_id"), inverseJoinColumns = @JoinColumn(name = "role_id"))
private List<Role> roleList = new ArrayList<Role>();

public List<Role> getRoleList() {
return roleList;
}

public void setRoleList(List<Role> roleList) {
this.roleList = roleList;
}

action类中的方法
public String list() {
CustomExample<User> example = new CustomExample<User>(this.getModel()) {
private static final long serialVersionUID = 1L;

public void appendCondition(Criteria criteria) {
entity.setValidFlag(ValidFlag.VALID);
criteria.addOrder(Order.asc("id"));          List<Org> orgs2 = orgService.findAllOrgByParentid(user.getParent().getId());
Long[] orgids2 = new Long[orgs2.size() + 1];
int i = 0;
if (orgs2.size() > 0) {
         for (Org org1 : orgs2) {
orgids2[i] = org1.getId();
i = i + 1;
}
criteria.add(Restrictions.in("parent.id", orgids2));
}
orgs = orgs2;
if (getOrgId() != null)
criteria.add(Restrictions.eq("parent.id", getOrgId()));
}
}
};

example.enableLike(MatchMode.ANYWHERE);
this.listResult = userService.findPageByExample(example,
PaginationSupport.pageToIndex(pageNum, numPerPage), numPerPage);

return LIST;
}

底层findPageByExample方法
DetachedCriteria executableCriteria1=DetachedCriteria.forClass(example.getEntityClass()).setFetchMode("roleList", FetchMode.SELECT);//将关联的rolelist集合对象采用查询方式抓取
executableCriteria=executableCriteria1.getExecutableCriteria(session);
executableCriteria = session.createCriteria(example
.getEntityClass());
executableCriteria.add(example);
example.appendCondition(executableCriteria);
int totalCount = ((Long) executableCriteria.setProjection(
Projections.rowCount()).uniqueResult()).intValue();
executableCriteria.setProjection(null);
executableCriteria
.setResultTransformer(CriteriaSpecification.ROOT_ENTITY);
for (int i = 0; orders != null && i < orders.length; i++) {
executableCriteria.addOrder(orders[i]);
}
executableCriteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY); //去除重复项
List items = executableCriteria.setFirstResult(startIndex)
.setMaxResults(pageSize).list();
PaginationSupport ps = new PaginationSupport(items, totalCount,
startIndex, pageSize);
return ps;

将关联的rolelist集合对象采用查询方式抓取
用这种方式取出的才是正确的数据