public List<Material> findOriginalMaterials(String xunhao){
		List<Material>  materialsTemp=new ArrayList<Material>();
		for (Material material : materials) {
			if(material.getXunhao().equals(xunhao)&&material.getYouxianji().equals("1")){
				materialsTemp.add(material);
			}
		}
		return materialsTemp;
	}