DOM4J解析xml代码实现

1、DOM4J是第三方提供的工具类，使用前需要导入DOM4J的jar包

下载地址：https://dom4j.github.io

public class Dom4jDemo {

    public static void main(String[] args) throws DocumentException {
        List<Student> stuList = new ArrayList<>();
        // 获取解析器对象
        SAXReader sr = new SAXReader();
        // 利用解析器对象把xml文件加载到内存并返回文档对象
        Document document = sr.read(new File("src\\xml\\student.xml"));
        // 获取文档的根标签
        Element rootElement = document.getRootElement();
        // 获取根标签下的子标签student
        List<Element> studentElements = rootElement.elements("student");
        for (Element studenElement : studentElements) {
            // 获取id这个属性和它的属性值
            Attribute attribute = studenElement.attribute("id");
            String id = attribute.getValue();

            // 获取Student类的属性对应的每个标签以及每个标签的标签体内容
            Element element2 = studenElement.element("name");
            String name = element2.getText();
            Element element3 = studenElement.element("age");
            String age = element3.getText();
            Element element4 = studenElement.element("height");
            String height = element4.getText();

            // 将数据封装到student对象
            Student s = new Student();
            s.setAge(Integer.parseInt(age));
            s.setHeight(Integer.parseInt(height));
            s.setId(id);
            s.setName(name);

            // 将student对象放入集合
            stuList.add(s);
        }

        // 遍历集合
        for (Student stu : stuList) {
            System.out.println(stu);
        }
    }

}

public class Student {

    private String id;
    private String name;
    private int age;
    private int height;

    public Student() {}

    public Student(String id, String name, int age, int height) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.height = height;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    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;
    }

    public int getHeight() {
        return height;
    }

    public void setHeight(int height) {
        this.height = height;
    }

    @Override
    public String toString() {
        return "Student [id=" + id + ", name=" + name + ", age=" + age + ", height=" + height + "]";
    }

}

<?xml version="1.0" encoding="UTF-8" ?>
<students>

    <student id="1">
        <name>张三</name>
        <age>20</age>
        <height>180</height>
    </student>

    <student id="2">
        <name>李四</name>
        <age>21</age>
        <height>178</height>
    </student>

</students>