<employees>    <employee id="111">        <firstName>Rakesh</firstName>        <lastName>Mishra</lastName>        <location>Bangalore</location>    </employee>    <employee id="112">        <firstName>John</firstName>        <lastName>Davis</lastName>        <location>Chennai</location>    </employee>    <employee id="113">        <firstName>Rajesh</firstName>        <lastName>Sharma</lastName>        <location>Pune</location>    </employee></employees>

public class DOMParserDemo {    public static void main(String[] args) throws Exception{        // 获取DOM Builder Factory        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();        // 获取DOM Builder        DocumentBuilder builder = factory.newDocumentBuilder();        // 加载xml文档        Document document = builder.parse("Employee.xml");        // 建立一个链表存放Employee对象        List<Employee> employeeList = new ArrayList<>();        // 提取数据        NodeList nodeList = document.getDocumentElement().getChildNodes();        // 迭代进行读取xml文档        for (int i = 0; i < nodeList.getLength(); i++) {            // 获取对应结点，这里的结点是employee标签            Node node = nodeList.item(i);            if (node instanceof Element) {                // 创建一个Employee空对象                Employee employee = new Employee();                // 获取xml文档中的id值                employee.id = node.getAttributes().getNamedItem("id").getNodeValue();                // 获取子结点信息                NodeList childNodes = node.getChildNodes();                for (int j = 0; j < childNodes.getLength(); j++) {                    // 获取对应结点                    Node node1 = childNodes.item(j);                    if (node1 instanceof Element) {                        // 获取对应的信息                        String content = node1.getTextContent().trim();                        switch (node1.getNodeName()) {                            case "firstName":                                employee.firstName = content;                                break;                            case "lastName":                                employee.lastName = content;                                break;                            case "location":                                employee.location = content;                                break;                        }                    }                }                // 将获取的每一个对象添加进入列表中去                employeeList.add(employee);            }        }        // 打印数据        for (Employee employee : employeeList) {            System.out.println(employee);        }    }}

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();dbf.setFeature("http://xml.org/sax/features/external-general-entities", false);        //防止外部实体dbf.setFeature("http://xml.org/sax/features/external-parameter-entities", false);   //防止参数实体

public class SAXParserDemo extends Exception {    public static void main(String[] args) throws Exception{        // 创建SAXParser Factory        SAXParserFactory factory = SAXParserFactory.newInstance();        SAXParser saxParser = factory.newSAXParser();        // 创建自定义的handler对象        SAXHandler saxHandler = new SAXHandler();        // 加载xml文档，加上自定义的handler对象        saxParser.parse("Employee.xml", saxHandler);        // 打印结果        for (Employee employee : saxHandler.employeeList) {            System.out.println(employee);        }    }}class SAXHandler extends DefaultHandler {    // 定义属性    List<Employee> employeeList = new ArrayList<>();    Employee employee = null;    String content = null;    @Override    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {        switch (qName) {            case "employee":                // 如果遇到了employee标签采用的逻辑                employee = new Employee();                employee.id = attributes.getValue("id");                break;        }    }    @Override    public void endElement(String uri, String localName, String qName) throws SAXException {        switch (qName) {            // 遇到结束标签采用的逻辑            case "firstName":                employee.firstName = content;                break;            case "lastName":                employee.lastName = content;                break;            case "location":                employee.location = content;                break;            case "employee":                employeeList.add(employee);                break;        }    }    @Override    public void characters(char[] ch, int start, int length) throws SAXException {        content = String.copyValueOf(ch, start, length).trim();    }}

startElement:36, SAXHandler (study.xmlParser)startElement:509, AbstractSAXParser (com.sun.org.apache.xerces.internal.parsers)startElement:745, XMLDTDValidator (com.sun.org.apache.xerces.internal.impl.dtd)scanStartElement:1359, XMLDocumentFragmentScannerImpl (com.sun.org.apache.xerces.internal.impl)scanRootElementHook:1289, XMLDocumentScannerImpl$ContentDriver (com.sun.org.apache.xerces.internal.impl)next:3132, XMLDocumentFragmentScannerImpl$FragmentContentDriver (com.sun.org.apache.xerces.internal.impl)next:852, XMLDocumentScannerImpl$PrologDriver (com.sun.org.apache.xerces.internal.impl)next:602, XMLDocumentScannerImpl (com.sun.org.apache.xerces.internal.impl)scanDocument:505, XMLDocumentFragmentScannerImpl (com.sun.org.apache.xerces.internal.impl)parse:842, XML11Configuration (com.sun.org.apache.xerces.internal.parsers)parse:771, XML11Configuration (com.sun.org.apache.xerces.internal.parsers)parse:141, XMLParser (com.sun.org.apache.xerces.internal.parsers)parse:1213, AbstractSAXParser (com.sun.org.apache.xerces.internal.parsers)parse:643, SAXParserImpl$JAXPSAXParser (com.sun.org.apache.xerces.internal.jaxp)parse:392, SAXParser (javax.xml.parsers)parse:274, SAXParser (javax.xml.parsers)main:20, SAXParserDemo (study.xmlParser)

SAXParserFactory spf = SAXParserFactory.newInstance();spf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);spf.setFeature("http://xml.org/sax/features/external-general-entities", false);spf.setFeature("http://xml.org/sax/features/external-parameter-entities", false);spf.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);SAXParser parser = spf.newSAXParser();parser.parse(InputSource, (HandlerBase) null);