dom4j和sax解析xml

*************************dom4j实例********************************** package test.xmlAnalyze;import java.io.File;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.OutputStreamWriter;import java.util.Iterator;import java.util.List;import org.dom4j.Attribute;import org.dom4j.Document;import org.dom4j.DocumentHelper;import org.dom4j.Element;import org.dom4j.io.OutputFormat;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;import org.junit.Ignore;import org.junit.Test;public class XmlOption {@Ignore@Testpublic void addXml() throws Exception{SAXReader reader=new SAXReader();Document doc=reader.read("src/user.xml");Element root=doc.getRootElement();Document doc2 = DocumentHelper.parseText("");//字符串解析成documentElement user = DocumentHelper.createElement("user");root.add(user);Element name = DocumentHelper.createElement("userName");name.setText("xingming2");user.add(name);// 确定格式OutputFormat of = OutputFormat.createPrettyPrint();// 写到控制台//OutputStreamWriter out = new OutputStreamWriter(System.out,"utf-8");//XMLWriter writer = new XMLWriter(new FileWriter(new File("src/user.xml")));FileOutputStream fis = new FileOutputStream("src/user.xml");OutputStreamWriter out = new OutputStreamWriter(fis,"utf-8");XMLWriter writer = new XMLWriter(out,of);writer.write(doc);writer.close();}@Ignore@Testpublic void modify() throws Exception{SAXReader reader=new SAXReader();Document doc=reader.read(new File("src/user.xml"));Element root = doc.getRootElement();for (Iterator it = root.elementIterator();it.hasNext();) {Element ele = (Element) it.next();for(Iterator i = ele.elementIterator();i.hasNext();){Element e = (Element) i.next();if (e.getText().equals("wwww")) {e.setText("ssss");}}}XMLWriter writer = new XMLWriter(new FileWriter(new File("src/user.xml")));writer.write(doc);writer.close();}@Ignore@Testpublic void remove() throws Exception{SAXReader reader=new SAXReader();Document doc=reader.read(new File("src/user.xml"));Element root = doc.getRootElement();for (Iterator it = root.elementIterator();it.hasNext();) {Element ele = (Element) it.next();for(Iterator i = ele.elementIterator();i.hasNext();){Element e = (Element) i.next();if (e.getText().equals("xingming2")) {root.remove(ele);}}}XMLWriter writer = new XMLWriter(new FileWriter(new File("src/user.xml")));writer.write(doc);writer.close();}@Ignore@Testpublic void xpath() throws Exception{SAXReader reader=new SAXReader();Document doc=reader.read(new File("src/user.xml"));// 定位该名字的所有节点List list = doc.selectNodes("//users/user/userName");for (Iterator ite = list.iterator();ite.hasNext();) {Element element = (Element) ite.next();System.out.println(element.getText());}// 找到所有user下属性id的值List attribues = doc.selectNodes("//users/user/@id");for (Iterator ite = attribues.iterator();ite.hasNext();) {Attribute attribute= (Attribute) ite.next();System.out.println(attribute.getValue());if (attribute.getValue().equals("001")) {}}XMLWriter writer = new XMLWriter(new FileWriter(new File("src/user.xml")));writer.write(doc);writer.close();}}******************************sax实例******************************** package test.xmlAnalyze;import java.io.InputStream;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.Attributes;import org.xml.sax.InputSource;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;public class MyXMLReader extends DefaultHandler {java.util.Stack tags = new java.util.Stack();private String preTag;public MyXMLReader() {}public static void main(String args[]) {long lasting = System.currentTimeMillis();try {SAXParserFactory sf = SAXParserFactory.newInstance();SAXParser sp = sf.newSAXParser();MyXMLReader reader = new MyXMLReader();//sp.parse(new InputSource("data_10k.xml"), reader);InputStream in = MyXMLReader.class.getResourceAsStream("data_10k.xml");sp.parse(in, reader);} catch (SAXException e){//e.printStackTrace();System.out.println(e.getMessage());} catch (Exception e) {e.printStackTrace();}System.out.println("运行时间：" + (System.currentTimeMillis() - lasting)+ "毫秒");}//只执行一次@Overridepublic void startDocument() throws SAXException {System.out.println("****startDocument****");}//没读一个标签都会调该方法@Overridepublic void characters(char ch[], int start, int length)throws SAXException {System.out.println("****characters****");//String tag = (String) tags.peek();if(preTag != null){if (preTag.equals("no")) {System.out.println("车牌号码：" + new String(ch, start, length));}if (preTag.equals("addr")) {String addr = new String(ch, start, length);System.out.println("地址:" +addr);if(addr.contains("号")){throw new SAXException("******终止解析*******");}}}}//读开始标签,之后调characters@Overridepublic void startElement(String uri, String localName, String qName,Attributes attrs) {System.out.println("****startElement****"+attrs.getValue("data"));//tags.push(qName);preTag = qName;}//读结束标签,之后调characters@Overridepublic void endElement(String uri,String localName,String name)throws SAXException { System.out.println("****endElement****");preTag = null;}}==========================================xml文件＜?xml version="1.0" encoding="GB2312"?＞＜RESULT＞＜VALUE＞＜NO＞A1234＜/NO＞＜ADDR＞四川省XX县XX镇XX路X段XX号＜/ADDR＞＜/VALUE＞＜VALUE＞＜NO＞B1234＜/NO＞＜ADDR＞四川省XX市XX乡XX村XX组＜/ADDR＞＜/VALUE＞＜/RESULT＞需要什么包自己到网上找下吧？==========================================1）DOM（JAXP Crimson解析器）DOM是用与平台和语言无关的方式表示XML文档的官方W3C标准。