JAVA 解析XML

使用DOM方式解析

public static void main(String[] args) throws SAXException, IOException {
        File file = new File("F:\\test.xml");
        DocumentBuilder builder=null;//抽象类
        DocumentBuilderFactory builderFactory=DocumentBuilderFactory.newInstance();
        try {
            builder = builderFactory.newDocumentBuilder();//取得默认
            Document document = builder.parse(file);
            Element element = document.getDocumentElement();
            System.out.println("根元素:"+element.getNodeName());
            NodeList nodeList =element.getChildNodes();//获取子元素节点
            for (int i = 0; i < nodeList.getLength(); i++) {
                Node node=nodeList.item(i);
                if("aritcle".equals(node.getNodeName())){
                    System.out.println("找到一篇文章所属分类为："+node.getAttributes().getNamedItem("category").getNodeValue()+".");
                    NodeList nodeDetail =node.getChildNodes();
                    for (int j = 0; j < nodeDetail.getLength(); j++) {
                        Node detail=nodeDetail.item(j);
                        if("name".equals(detail.getNodeName())){
                            System.out.println("标题:"+detail.getTextContent());
                        }else if("author".equals(detail.getNodeName())){
                            System.out.println("作者:"+detail.getTextContent());
                        }else if("date".equals(detail.getNodeName())){
                            System.out.println("出版日期:"+detail.getTextContent());
                        }
                    }
                    System.out.println();
                }
            }
            
            
        } catch (ParserConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

 

使用SAX方式解析

public class XMLSAX {

    public static void main(String[] args) throws SAXException, IOException {
        File file = new File("F:\\test.xml");
        SAXParserFactory spf=SAXParserFactory.newInstance();
        try {
            SAXParser parser= spf.newSAXParser();
            parser.parse(file, new MySaxHandler());
        } catch (ParserConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

public class MySaxHandler extends DefaultHandler {

    static DateFormat dateFormat = 
            new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    private String content;
    public void characters(char[] ch,int start,int length){
        content = new String(ch,start,length);
    }
    
    public void endElement(String uri,String localName,String qName){
        if("name".equals(qName)){
            System.out.println("标题:"+content);
        }else if("author".equals(qName)){
            System.out.println("作者:"+content);
        }else if("date".equals(qName)){
            System.out.println("出版日期:"+content);
        }
    }
    public void startElement(String uri,String localName,String qName,Attributes attribute){
        if("aritcle".equals(qName)){
        System.out.println("找到一篇文章所属分类为："+attribute.getValue("category")+".");
        }
        System.out.println(qName);
    }
}

 

使用JAXB于XML映射

@XmlRootElement
public class Aritcle {

    private String name;
    private String author;
    private String date;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAuthor() {
        return author;
    }
    public void setAuthor(String author) {
        this.author = author;
    }
    public String getDate() {
        return date;
    }
    public void setDate(String date) {
        this.date = date;
    }
}

 

　　a.把XML映射成Java对象

public static void main(String[] args) {
    File file = new File("E:\\test.xml");
    JAXBContext context;
    try {
        context=JAXBContext.newInstance(Aritcle.class);
        Marshaller mh=context.createMarshaller();
        
        Aritcle aritcle=new Aritcle();
        aritcle.setAuthor("水水水水水");
        aritcle.setDate("2015-8-25");
        aritcle.setName("java");
        mh.marshal(aritcle, file);
        
    } catch (JAXBException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    
}

  b.把XML映射成JAVA对象

public static void main(String[] args) {
    File file = new File("E:\\test.xml");
    JAXBContext context;
     try {
        context = JAXBContext.newInstance(Aritcle.class);
        Unmarshaller um=context.createUnmarshaller();
        Aritcle aritcle=(Aritcle) um.unmarshal(file);
        System.out.println(aritcle.getAuthor());
        System.out.println(aritcle.getDate());
    } catch (JAXBException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    
}