Dom4J方式解析XML文件。dom4j是非官方提供的xml文件解析方式，因此需要去第三方下载dom4j的jar包

File file = new File("D:\\chengmuzhe\\java\\JavaOOP6.0\\students.xml");

SAXReader reader = new SAXReader();

Document document = reader.read(file);

Element root = document.getRootElement();

try {

System.out.println("学生信息:");

for (Iterator iterator = root.elementIterator(); iterator.hasNext();) {

Element element = (Element) iterator.next();

String ids = element.elementText("stuId");

System.out.println(ids);

String names = element.elementText("stuName");

System.out.println(names);

String age = element.elementText("age");

System.out.println(age);

}

} catch (Exception e) {

// TODO: handle exception

}

读XML是还有一种方法就是使用Document的selectNodes来查找节点

使用这个方法是需要另外的包

导入xPath支持的jar包。jaxen-1.1-beta-6.jar(首先要先导入dom4j包，dom4j下载地址：http://www.dom4j.org/dom4j-1.6.1/)。下载jdom时在解压后的lib下

List lists = document.selectNodes("//students");

Iterator iter = lists.iterator();

while (iter.hasNext()) {

Element element = (Element) iter.next();

String ids = element.elementText("stuId");

System.out.println(ids);

String names = element.elementText("stuName");

System.out.println(names);

String age = element.elementText("age");

System.out.println(age);

}

写XML

Document document = DocumentHelper.createDocument();

Element element = document.addElement("students");

Element studentElement = element.addElement("student");

studentElement.addAttribute("email", "5@5.com");

Element idElement = studentElement.addElement("stuId");

idElement.setText("55");

Element nameElement = studentElement.addElement("stuName");

idElement.setText("55Name");

Element ageElement = studentElement.addElement("age");

ageElement.setText("55");

try {

XMLWriter output = new XMLWriter(new FileWriter(new File(

"students2.xml")));

output.write(document);

output.close();

} catch (IOException e) {

System.out.println(e.getMessage());

}