XML实现动物园动物添加功能
2022/1/12 23:08:12
本文主要是介绍XML实现动物园动物添加功能,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
动物园新进了3头大象:
胖胖,2岁,1.2吨;
肥仔,1岁,1.5吨;
憨憨,3岁,1.8吨;
还有3只猴子:
星仔,3岁,0.8米;
狒狒,4岁,0.9米;
猴哥,5岁,1.0米;
它们的信息存在了集合中,现在动物管理员需要将这些宝贝们的信息存入xml中保存.请你写一个程序,结合面向对象,和dom4j技术,帮管理员实现这个功能。
1.首先创建动物类作为父类
public class Animal { private String name; private int age; public Animal(String name, int age) { this.name = name; this.age = age; } public Animal() { } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }
2.再创建两个子类
大象类(Elephant)
public class Elephant extends Animal{ private double weight; public Elephant() { } public Elephant(double weight) { this.weight = weight; } public Elephant(String name, int age, double weight) { super(name, age); this.weight = weight; } public double getWeight() { return weight; } public void setWeight(double weight) { this.weight = weight; } }
猴子类(Monkey)
public class Monkey extends Animal { private double height; public Monkey() { } public Monkey(double height) { this.height = height; } public Monkey(String name, int age, double height) { super(name, age); this.height = height; } public double getHeight() { return height; } public void setHeight(double height) { this.height = height; } }
3.最后测试类
import org.dom4j.Document; import org.dom4j.DocumentHelper; import org.dom4j.Element; import org.dom4j.io.OutputFormat; import org.dom4j.io.XMLWriter; import java.io.*; import java.util.ArrayList; public class AnimalTest { public static void main(String[] args) throws Exception{ ArrayList<Animal> animals = new ArrayList<>(); animals.add(new Elephant("胖胖",2,1.2)); animals.add(new Elephant("肥仔",1,1.5)); animals.add(new Elephant("猪哥",3,1.8)); animals.add(new Monkey("星仔",3,0.8)); animals.add(new Monkey("狒狒",4,0.9)); animals.add(new Monkey("猴哥",5,1.0)); Xmlcreat(animals); } public static void Xmlcreat(ArrayList<Animal> animals) throws IOException { //创建DOM数 Document document = DocumentHelper.createDocument(); //添加根节点 Element animals1 = document.addElement("animals"); //遍历集合 for (int i = 0; i < animals.size(); i++) { //添加子节点 Element animal = animals1.addElement("animal"); //再给子节点添加子节点 Element name = animal.addElement("name"); name.setText(animals.get(i).getName()); Element age = animal.addElement("age"); age.setText(animals.get(i).getAge()+"岁"); //判断是大象还是猴子 if (animals.get(i) instanceof Elephant){ Element weight = animal.addElement("weight"); weight.setText(((Elephant)animals.get(i)).getWeight()+"吨"); }else{ Element height = animal.addElement("height"); height.setText(((Monkey)animals.get(i)).getHeight()+"米"); } } //写入xml中 // FileOutputStream out = new FileOutputStream("/src/day22/HomeWork.xml"); // OutputFormat format = OutputFormat.createPrettyPrint(); // XMLWriter writer = new XMLWriter(out, format); // writer.write(document); // writer.close(); String s = System.getProperty("user.dir") + "/src/day22/HomeWork.xml"; FileWriter fileWriter = new FileWriter(s); document.write(fileWriter); fileWriter.close(); } }
运行完成以后查看xml文档
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