学步园

	private List<ProductCategory> recursivProductCategoryTreeList(List<ProductCategory> allProductCategoryList, ProductCategory p, List<ProductCategory> temp) {
		if (temp == null) {
			temp = new ArrayList<ProductCategory>();
		}
		for (ProductCategory productCategory : allProductCategoryList) {
			ProductCategory parent = productCategory.getParent();
			if ((p == null && parent == null) || (productCategory != null && parent == p)) {
				temp.add(productCategory);
				if (productCategory.getChildren() != null && productCategory.getChildren().size() > 0) {
					recursivProductCategoryTreeList(allProductCategoryList, productCategory, temp);
				}
			}
		}
		return temp;
	}