- 在之前的jsoup解析本地html网页到本地中，虽然可以实现不同食物的解析，但是每个食物单独写一个方法实在太麻烦了
- 注意到所有食物均属于Food的子类，且解析方法中有许多重复代码
- 可将
Food food以及Element foodDiv这两个方法中重复的参数作为通用方法的参数，提取公用方法：
// 提取公共解析逻辑到独立方法private void parseCommonFields(Element foodDiv, Food food) {String imgUrl = Objects.requireNonNull(foodDiv.selectFirst("img")).attr("src");String name = Objects.requireNonNull(foodDiv.selectFirst("h2")).text();String weight = foodDiv.select("p:contains(Weight)").text().replace("Weight: ", "");String caloriesStr = foodDiv.select("p:contains(Calories)").text().replace("Calories: ", "").replace("kcal", "").trim();int calories = Integer.parseInt(caloriesStr);String priceStr = foodDiv.select("p.price").text().replace("$", "");double price = Double.parseDouble(priceStr);String features = foodDiv.select("p.features").text().replace("Features: ", "");food.setName(name);food.setWeight(weight);food.setCalories(calories);food.setPrice(price);food.setFeatures(features);food.setImgUrl(imgUrl);}
然后，每个食物只需要调用公共方法，并提取自己的特有部分即可：
- Pizzas:
public List<Pizza> parsePizzas(String filePath) {List<Pizza> pizzas = new ArrayList<>();try {Document doc = Jsoup.parse(new File(filePath), "UTF-8");Elements pizzaDivs = doc.select("div.pizza");for (Element pizzaDiv : pizzaDivs) {Pizza pizza = new Pizza();parseCommonFields(pizzaDiv, pizza); // 调用公共解析方法// 只处理Pizza特有的字段String radius = pizzaDiv.select("p:contains(Radius)").text().replace("Radius: ", "");pizza.setRadius(radius);pizzas.add(pizza);}} catch (Exception e) {System.out.println("解析Pizza数据失败" + e.getMessage());}return pizzas;}
- FrenchFries:
public List<FrenchFries> parseFrenchFriess(String filePath) {List<FrenchFries> frenchFriesList = new ArrayList<>();try {Document doc = Jsoup.parse(new File(filePath), "UTF-8");Elements friesDivs = doc.select("div.french-fries");for (Element friesDiv : friesDivs) {FrenchFries frenchFries = new FrenchFries();parseCommonFields(friesDiv, frenchFries); // 调用公共解析方法// 只处理FrenchFries特有的字段String thickness = friesDiv.select("p:contains(Thickness)").text().replace("Thickness: ", "");frenchFries.setThickness(thickness);frenchFriesList.add(frenchFries);}} catch (IOException e) {throw new RuntimeException(e);}return frenchFriesList;}
- FriedChicken:
public List<FriedChicken> parseFriedChickens(String filePath) {List<FriedChicken> friedChickenList = new ArrayList<>();try {Document doc = Jsoup.parse(new File(filePath), "UTF-8");Elements friedChickenDivs = doc.select("div.fried-chicken");for (Element friedChickenDiv : friedChickenDivs) {FriedChicken friedChicken = new FriedChicken();parseCommonFields(friedChickenDiv, friedChicken); // 调用公共解析方法// 只处理FriedChicken特有的字段String spiciness = friedChickenDiv.select("p:contains(Spiciness)").text().replace("Spiciness: ", "");friedChicken.setSpiciness(spiciness);friedChickenList.add(friedChicken);}} catch (IOException e) {throw new RuntimeException(e);}return friedChickenList;}