xml的操作-解析篇

2014-05-04 11:16 吴文付 工作上，学习上，肯定会碰到xml的操作。这里提供详细的xml解析方法。

这里的规划如下：简单的布局3个按钮。3个按钮，对应3种解析xml的方法。分别为 sax解析 dom解析 pull解析

 

12:56 完成了dom的解析。比较简单。

后来增加了dom4j的解析。

 

<?xml version='1.0' encoding='utf-8' standalone='yes' ?><beauties><beauty><name>杨幂</name><age>23</age></beauty><beauty><name>林志玲</name><age>28</age></beauty></beauties>

 

 

private List<Beauty> getBeauties(InputStream inStream) throws Throwable {
        List<Beauty> beauties = new ArrayList<Beauty>();
        // DOM文件创建工厂
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        // DOM创建对象
        DocumentBuilder builder = factory.newDocumentBuilder();
        // 获取XML的DOM
        Document document = builder.parse(inStream);
        // 获取XML文件的内容
        Element root = document.getDocumentElement();
        // 获取XML文件的节点
        NodeList beautyNode = root.getElementsByTagName("beauty");
        for (int i = 0; i < beautyNode.getLength(); i++) {
            Beauty Beauty = new Beauty();

            Element beautyElemt = (Element) beautyNode.item(i);
            // 获取当前节点的字节点
            NodeList beautyChildNode = beautyElemt.getChildNodes();
            for (int y = 0; y < beautyChildNode.getLength(); y++) {
                if (beautyChildNode.item(y).getNodeType() == Node.ELEMENT_NODE) {
                    Element childElent = (Element) beautyChildNode.item(y);
                    if ("name".equals(childElent.getNodeName())) {
                        Beauty.setName(childElent.getFirstChild()
                                .getNodeValue());
                    } else if ("age".equals(childElent.getNodeName())) {
                        Beauty.setAge(new Short(childElent.getFirstChild()
                                .getNodeValue()));
                    }
                }
            }
            beauties.add(Beauty);
        }
        return beauties;
    }

 

 

private List<Beauty> dom4jXMLResolve(InputStream inStream) {
        List<Beauty> beautiesList = null;
        Beauty beauty = new Beauty();

        InputStream is = inStream;
        try {
            SAXReader reader = new SAXReader();
            org.dom4j.Document doc = reader.read(is);

            org.dom4j.Element eleRoot = doc.getRootElement(); // 获得root根节点，引用类为
                                                                // org.dom4j.Element

            System.out.println("----->根节点" + eleRoot.getName());
            beautiesList = new ArrayList<Beauty>();

            // 获取root子节点，即beauty
            Iterator<org.dom4j.Element> iter = eleRoot.elementIterator(); //

            while (iter.hasNext()) {
                org.dom4j.Element eleBeauty = (org.dom4j.Element) iter.next();

                // 筛选节点
                if ("beauty".equals(eleBeauty.getName())) {

                    // 获取beauty子节点，即name、age
                    Iterator<org.dom4j.Element> innerIter = eleBeauty
                            .elementIterator();
                    
                    beauty = new Beauty();
                    
                    while(innerIter.hasNext()) {
                        org.dom4j.Element ele = (org.dom4j.Element) innerIter
                                .next();

                        if ("name".equals(ele.getName())) {
                            String name = ele.getText();
                            beauty.setName(name);
                        } 
                        
                        if ("age".equals(ele.getName())) {
                            String age = ele.getText();
                            beauty.setAge(Short.parseShort(age));
                        }
                    }

                    
                }
                
                beautiesList.add(beauty); // 添加到集合中
                

            }

        } catch (DocumentException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return beautiesList;
    }

 

 

private List<Beauty> saxResolveXML(InputStream in){

        InputStream is = in;
        
        List<Beauty> beautiesList = new ArrayList<Beauty>();
        try {
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser saxParser = factory.newSAXParser();
            
            BeautyHandler handler = new BeautyHandler();    // person处理Handler
            saxParser.parse(is, handler);                    // handler解析xml
            
            // 获取解析的xml
            //String xmlHeader = handler.getXMLHeader();
            
             beautiesList = handler.getBeauties();
            
            
        } catch (FactoryConfigurationError e) {            // SAXParserFactory.newInstance
            e.printStackTrace();
        } catch (ParserConfigurationException e) {        // factory.newSAXParser
            e.printStackTrace();
        } catch (SAXException e) {            // factory.newSAXParser
            e.printStackTrace();
        } catch (IllegalArgumentException e) {        // saxParser.parse
            e.printStackTrace();
        } catch (IOException e) {            // saxParser.parse
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return beautiesList;
    }
    
    /** Handler处理类 */
    private final class BeautyHandler extends DefaultHandler{
        private List<Beauty> beautiesList = null;    // 保存beauty
        private Beauty beauty = null;
        
        private String tag = null;            // xml Element
        
        
        
        /** 返回解析的Beauty实例数组 */
        public List<Beauty> getBeauties(){
            return beautiesList;
        }
        
        @Override
        public void startDocument() throws SAXException{
            super.startDocument();
            beautiesList = new ArrayList<Beauty>();
            
        }
        
        @Override
        public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException{
            super.startElement(uri, localName, qName, attributes);
            if("root".equals(localName)) {
                String attrAuthor = attributes.getValue(0);
                String attrDate = attributes.getValue(1);
                
                
            } else if("beauty".equals(localName)) {
                beauty = new Beauty();
            } 
            tag = localName;
        }
        
        @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            super.characters(ch, start, length);
            if (null != tag) {
                String value = new String(ch, start, length);
                System.out.println("value = " + value);
                if ("name".equals(tag)) {
                    beauty.setName(value);
                } else if ("age".equals(tag)) {
                    beauty.setAge(new Short(value));
                } 
            }
        }
        
        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            if("beauty".equals(qName)) {
                beautiesList.add(beauty);
                beauty = null;
            }
            tag = null;
            super.endElement(uri, localName, qName);
        }
        
        @Override
        public void endDocument() throws SAXException{
//            personsList = null;
            super.endDocument();
        }
    }

 

 

private static List<Beauty> pullXMLResolve(InputStream inputStream) throws Exception{  
            List<Beauty> beautiesList = null;  
            Beauty beauty = null;  
            XmlPullParser parser = Xml.newPullParser();  
            parser.setInput(inputStream, "UTF-8");  
              
            int event = parser.getEventType();//产生第一个事件  
            while(event!=XmlPullParser.END_DOCUMENT){  
                switch(event){  
                case XmlPullParser.START_DOCUMENT://判断当前事件是否是文档开始事件  
                    beautiesList = new ArrayList<Beauty>();//初始化集合  
                    break;  
                case XmlPullParser.START_TAG://判断当前事件是否是标签元素开始事件  
                    if("beauty".equals(parser.getName())){//判断开始标签元素是否是beauty
                        beauty = new Beauty();  
                    }  
                    if(beauty!=null){  
                        if("name".equals(parser.getName())){//判断开始标签元素是否是name  
                            beauty.setName(parser.nextText());  
                        }else if("age".equals(parser.getName())){//判断开始标签元素是否是age  
                            beauty.setAge(Short.parseShort(parser.nextText()));  
                        }  
                    }  
                    break;  
                case XmlPullParser.END_TAG://判断当前事件是否是标签元素结束事件  
                    if("beauty".equals(parser.getName())){//判断结束标签元素是否是beauty  
                        beautiesList.add(beauty);//将beauty添加到beautiesList集合  
                        beauty = null;  
                    }  
                    break;  
                }  
                event = parser.next();//进入下一个元素并触发相应事件  
            }//end while  
            return beautiesList;  
        }
     

 

 

class Beauty {
    String name;
    Short age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Short getAge() {
        return age;
    }

    public void setAge(Short age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Beauty [age=" + age + ", name=" + name + "]";
    }

    public Beauty(String name, Short age) {
        this.name = name;
        this.age = age;
    }

    public Beauty() {

    }

}

 

 

 演示的工程地址如下：所需要的jar包在工程的libs中

http://download.csdn.net/detail/douniwan123654/7293451

 

效果图：

 

 

 

解析后的效果