XML解析 Dom4j.md

pom.xml :

<!-- https://mvnrepository.com/artifact/org.dom4j/dom4j -->
<dependency>
    <groupId>org.dom4j</groupId>
    <artifactId>dom4j</artifactId>
    <version>2.1.3</version>
</dependency>

public class XmlParserUtils {
    public static <T> List<T> parse(String file, Class<T> targetClass) {
        ArrayList<T> list = new ArrayList<>(); // 封装解析出来的数据

        try{
            // 1. 获取一个对象解析器对象
            SAXReader saxReader = new SAXReader();
            // 2. 利用解析器把xml文件加载到内存中
            Document document = saxReader.read(new File(file));
            // 3. 获取根标签
            Element rootElement = document.getRootElement();
            // 4. 通过根标签来获取 user 标签
            List<Element> elements = rootElement.elements("emp");

            // 5. 便利集合，得到每一个user标签
            for(Element element : elements) {
                // 获取 name 属性
                String name = element.element("name").getText();
                // 获取 age 属性
                String age = element.element("age").getText();
                // 获取 image 属性
                String image = element.element("image").getText();
                // 获取 gender 属性
                String gender = element.element("gender").getText();
                // 获取 job 属性
                String job = element.element("job").getText();

                //组装数据
                Constructor<T> constructor = targetClass.getDeclaredConstructor(String.class, Integer.class, String.class, String.class, String.class);
                constructor.setAccessible(true);
                T object = constructor.newInstance(name, Integer.parseInt(age), image, gender, job);

                list.add(object);
            }
        } catch (DocumentException e) {
//            throw new RuntimeException(e);
            e.printStackTrace();
        }

        return list;
    }
}