hibernate manytomany 只删除本表和中间表数值

public String deleteSpri() {
try {
SPrivlege s = this.sPrivlegeManager.getSPriv(sp);

/**获取s关联的所有GROUP对象集合**/
Set<Group> groups=s.getGroups();

for(Group g:groups){

/**取消关联**/
g.getSprivleges().remove(s);
}

/**删除**/
this.sPrivlegeManager.delete(s);
return SUCCESS;

} catch (Exception e) {
System.out.println(e.getMessage());
return

ERROR;
}
}