读取XML文件，解析XML文件

1.读取XML文件

<?xml version="1.0" encoding="UTF-8"?>  
<userlist>
	<user>
		<name>zhangsan</name>
		<mobile>123456789</mobile>
		<email>[e-mail]</email>
		<birthday>1980-06-26</birthday>
	</user>
	
	<user>
		<name>lisi</name>
		<mobile>156748951</mobile>
		<email>[e-mail]</email>
		<birthday>1989-06-06</birthday>
	</user>
</userlist>

（1）inputStream类型

InputStream input = this.getClass().getClassLoader().getResourceAsStream("user.xml");

（2）转成string类型

InputStream input = this.getClass().getClassLoader().getResourceAsStream("user.xml");
        SAXReader saxReader = new SAXReader();
        Document document = null;
String xmlData = document.asXML();

2.解析XML文件
(1)String类型输入

List<User> userList = new ArrayList<User>(10);
        
        try
        {
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            [b]InputSource is = new InputSource();
            is.setCharacterStream(new StringReader(xmlData));[/color]            
            //转换成document后解析，不管是inputsteam或者string
            Document doc = db.parse(is);[/b]      
            NodeList usersNodes = doc.getElementsByTagName("user");
            for (int i = 0; i < usersNodes.getLength(); i++)
            {
                Element usersElement = (Element)usersNodes.item(i);
                User user = new User();
                NodeList childNodes = usersElement.getChildNodes();
                //          System.out.println("*****"+childNodes.getLength());   
                for (int j = 0; j < childNodes.getLength(); j++)
                {
                    if (childNodes.item(j).getNodeType() == Node.ELEMENT_NODE)
                    {
                        if ("name".equals(childNodes.item(j).getNodeName()))
                        {
                            user.setName(childNodes.item(j).getFirstChild().getNodeValue());
                        }
                        else if ("mobile".equals(childNodes.item(j).getNodeName()))
                        {
                            user.setMobile(childNodes.item(j).getFirstChild().getNodeValue());
                        }
                        else if ("email".equals(childNodes.item(j).getNodeName()))
                        {
                            user.setEmail(childNodes.item(j).getFirstChild().getNodeValue());
                        }
                        else if ("birthday".equals(childNodes.item(j).getNodeName()))
                        {
                            String dataString = childNodes.item(j).getFirstChild().getNodeValue();
                            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
                            
                            try
                            {
                                Date date = sdf.parse(dataString);//字符串转时间   
                                user.setBirthday(date);
                            }
                            catch (ParseException e)
                            {
                                e.printStackTrace();
                            }
                            
                        }
                    }
                    
                }//end for j  
                userList.add(user);
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }

（2）inputstream类型
将红色部分换成如下代码

Document document = null;
                try
                {
                    builder = factory.newDocumentBuilder();
                    
                }
                catch (ParserConfigurationException e1)
                {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                
                try
                {
                    document = builder.parse(xmlData);
                }
                catch (SAXException e1)
                {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                catch (IOException e1)
                {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                
               Element element = document.getDocumentElement();