以前的时候，也解析过，今天又拿出来解析就让忘记怎么解析了，后来在网上查还有自己想，终于解析出来了，下面就是原XML文件：
accp.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE accp SYSTEM "accp.dtd">
<?xml-stylesheet type="text/css" href="accp.css"?>
<accp><teachers><teacher ><name>刘老师</name><age>30</age><degree>硕士</degree><position>Java</position>		</teacher><teacher><name>李老师</name><age>28</age><degree>本科</degree><position>.Net</position>		</teacher></teachers><students><student><name>高胜寒</name><age>21</age>			<grade>Y2</grade><school>北京中心</school></student><student><name>信达雅</name><age>19</age><grade>S2</grade><school>天津中心</school></student></students>
</accp>

还需要一个dtd文件accp.dtd：

<!ELEMENT accp (teachers,students)>
<!ELEMENT teachers (teacher*)>
<!ELEMENT students (student*)>
<!ELEMENT teacher (name,age,degree,position)>
<!ELEMENT student (name,age,grade,school)>
<!ELEMENT name (#PCDATA)>
<!ELEMENT age (#PCDATA)>
<!ELEMENT degree (#PCDATA)>
<!ELEMENT position (#PCDATA)>
<!ELEMENT grade (#PCDATA)>
<!ELEMENT school (#PCDATA)>

最后就是解析的代码了：

//解析xml文件public static void Test1(){DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();//从DOM工厂获得DOM解析器try {DocumentBuilder db = dbf.newDocumentBuilder();//解析文档，得到一个dom树Document doc = db.parse("accp.xml");//得到所有的teacher节点NodeList teaList = doc.getElementsByTagName("teacher");System.out.println("xml里面共有"+teaList.getLength()+"个老师信息！");//循环老师信息for (int i = 0; i < teaList.getLength(); i++) {Node teacher = teaList.item(i);//获取第i个老师的信息的id值并输出/*Element element = (Element)teacher;String id = element.getAttribute("id");System.out.println("id:"+id);*///获取第i个老师元素的所有子元素的名称和值并输出for(Node node=teacher.getFirstChild();node!=null;node =node.getNextSibling() ){if(node.getNodeType()==Node.ELEMENT_NODE){String value = node.getFirstChild().getNodeValue();System.out.print("name:"+value+"\t");}}System.out.println();}} catch (ParserConfigurationException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SAXException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}

最后看一下运行结果：