级联删除栏目

<pre name="code" class="java">public String del() {
	String[] ids = getRequest().getParameterValues("ids");
	if (ids != null) {
		for (String id : ids) {
			Section section = sectionService.get(new Long(id));
			if(null != section){
				delse(section);
			}
		}
	}
	jsonString = "{success:true}";
	return SUCCESS;
}
	
private void delse(Section section){
	Set<Section> sets=section.getSections();
	if(sets.size()>0){
		for (Section section2 : sets) {
			delse(section2);
		}
		sectionService.remove(section);
	}else{
		sectionService.remove(section);
	}
}