XML文件的解析 Dom4J

public class Dom4JHelloWorldDemo1 {
    @Test
    public void passXMLData() throws Exception{
        SAXReader saxReader = new SAXReader();
        //Document document = saxReader.read(new File("xml-app\\src\\Contacts.xml"));//需要通过模块取定位
        ////Document document = saxReader.read(new FileInputStream("xml-app\\src\\Contacts.xml"));

        //注意:/ 是直接去src下寻找的文件
        InputStream is = saxReader.getClass().getResourceAsStream("/Contacts.xml");
        Document document = saxReader.read(is);

        //3.获取根元素对象
        Element root = document.getRootElement();
        System.out.println(root.getName());//取得根元素名称

        //4.拿根元素下的全部子元素对象(一级,直接儿子)
        //List<Element> sonList = root.elements();//拿到所有子元素
        List<Element> sonList = root.elements("contact");
        for (Element element :sonList) {
            System.out.println(element.getName());
        }
        //拿某个子元素
        Element userEle = root.element("user");
        System.out.println(userEle.getName());


        //默认提取第一个子元素对象(潘金莲)
        Element contact = root.element("contact");
        //获取子元素文本
        System.out.println(contact.elementText("name"));
        //去掉前后空格
        System.out.println(contact.elementTextTrim("name"));//潘金莲前后空格没有了
        //根据元素获取属性值
        Attribute idAttr = contact.attribute("id");
        System.out.println(idAttr.getName() +"-->"+ idAttr.getValue());
        //直接提取属性值
        System.out.println(contact.attributeValue("id"));
        System.out.println(contact.attributeValue("vip"));

        //获取当前元素下的子元素对象
        Element email = contact.element("email");
        System.out.println(email.getText());

    }
}

<?xml version="1.0" encoding="UTF-8"?>
<contactList>
    <contact id="1" vip="true">
        <name>   潘金莲  </name>
        <gender>女</gender>
        <email>panpan@itcast.cn</email>
    </contact>
    <contact id="2" vip="false">
        <name>武松</name>
        <gender>男</gender>
        <email>wusong@itcast.cn</email>
    </contact>
    <contact id="3" vip="false">
        <name>武大狼</name>
        <gender>男</gender>
        <email>wuda@itcast.cn</email>
    </contact>
    <user>
    </user>
</contactList>