XML解析方式汇总

XML解析方式汇总

分类： XML2011-08-23 19:19 167人阅读 评论(0) 收藏 举报

xmlstringexceptionattributesclassiterator

DOM解析：

1：
public class DomPaeseXml {

public static void main(String[] args) throws Exception {
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  DocumentBuilder db = dbf.newDocumentBuilder();
  Document document = db.parse(new File("student.xml") ) ;
  
//  System.out.println(document.getXmlVersion());
//  System.out.println(document.getXmlStandalone());
//  System.out.println(document.getXmlVersion());
  
  Element element = document.getDocumentElement();
  System.out.println(element.getNodeName());
  
  NodeList list = element.getChildNodes();
  System.out.println(list.getLength());
  
  for (int i = 0; i < list.getLength(); i++) {
   System.out.println(list.item(i).getNodeName());
  }
  System.out.println("***************************");
  NodeList nodeList = document.getElementsByTagName("学生");
  for (int i = 0; i < nodeList.getLength(); i++) {
   Element elment =(Element)nodeList.item(i);
   String str = elment.getElementsByTagName("姓名").item(0).getFirstChild().getNodeValue();
   System.out.println("姓名:"+str);
   str = elment.getElementsByTagName("性别").item(0).getFirstChild().getNodeValue();
   System.out.println("性别:"+str);
   str = elment.getElementsByTagName("年龄").item(0).getFirstChild().getNodeValue();
   System.out.println("年龄:"+str);
   System.out.println("-------------------------------------------------");
  }
  
  for (int i = 0; i < list.getLength(); i++) {
   Node node = list.item(i);
   System.out.println(node.getNodeType()+" : " + node.getNodeValue());
  }
  
 } 
}

2：解析任意的XML文件：

public class DomParseXml2 {

private static StringBuilder stringBuilder = new StringBuilder();

public static void main(String[] args) throws Exception {

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  DocumentBuilder db = dbf.newDocumentBuilder();
  Document doc = db.parse(new File("student.xml"));
  // 得到文档根元素
  Element element = doc.getDocumentElement();
  getChildren(element);
  System.out.println(stringBuilder);
 }

private static void getChildren(Element element) {
  stringBuilder.append("<"+element.getNodeName());
  NodeList nodeList = element.getChildNodes();
  NamedNodeMap map = element.getAttributes();
  //如果存在属性
  if (map != null) {
   for(int i=0;i<map.getLength();i++){
    Attr attr = (Attr)map.item(i);
    stringBuilder.append(" "+attr.getName()+"=\""+attr.getValue()+"\"");
   }
  }
  stringBuilder.append(">");
  
  
  if(nodeList!=null){
   for (int i = 0; i < nodeList.getLength(); i++) {
    Node node = nodeList.item(i);
    short type = node.getNodeType();
    if(type==Node.TEXT_NODE){
     stringBuilder.append(node.getNodeValue());
    }else if (type==Node.ELEMENT_NODE) {
     getChildren((Element)node);
    }else if (type==Node.COMMENT_NODE) {
     Comment comment = (Comment)node;
     stringBuilder.append("<!--"+comment.getData()+"-->");
    }
   }
  }
  stringBuilder.append("</"+element.getTagName()+">");
 }
}

SAX解析，基于事件：
1：

public class SAXParseXML {

public static void main(String[] args) throws Exception {
  SAXParserFactory factory = SAXParserFactory.newInstance();
  SAXParser parser = factory.newSAXParser();
  parser.parse(new File("student.xml"),new MyHandler());
 }
}

class MyHandler extends DefaultHandler{

@Override
 public void endDocument() throws SAXException {
  System.out.println("document end");
 }

@Override
 public void endElement(String uri, String localName, String name)
   throws SAXException {
  System.out.println("element end");
 }

@Override
 public void startDocument() throws SAXException {
  System.out.println("document start");
 }

@Override
 public void startElement(String uri, String localName, String name,
   Attributes attributes) throws SAXException {
  System.out.println("element start");
 }
}
2：

public class SAXParseXML2 {
 public static void main(String[] args) throws Exception {
  SAXParserFactory factory = SAXParserFactory.newInstance();
  SAXParser parser = factory.newSAXParser();
  parser.parse(new File("student.xml"), new MyHandler2());
 }
}
class MyHandler2 extends DefaultHandler {

private Stack<String> stack = new Stack<String>();
 private String name;
 private String age;
 private String gender;

@Override
 public void endElement(String uri, String localName, String qName)
   throws SAXException {
  stack.pop();
  if("学生".equals(qName)){
   System.out.println("姓名"+"="+name);
   System.out.println("年龄"+"="+age);
   System.out.println("性别"+"="+gender);
   System.out.println();
  }
 }

@Override
 public void startElement(String uri, String localName, String name,
   Attributes attributes) throws SAXException {
  stack.push(name);
  for (int i = 0; i < attributes.getLength(); i++) {
   String qName = attributes.getQName(i);
   String value = attributes.getValue(i);
   System.out.println(qName + "=" + value);
  }
 }
 @Override
 public void characters(char[] ch, int start, int length)
   throws SAXException {
  String tag = stack.peek();
  if ("性别".equals(tag)) {
   gender = new String(ch, start, length);
  }
  if ("姓名".equals(tag)) {
   name = new String(ch, start, length);
  }
  if ("年龄".equals(tag)) {
   age = new String(ch, start, length);
  }
 }
}

Jdom:

public class JdomTest1 {

public static void main(String[] args) throws Exception {
  Document document  = new Document();
  Element root = new Element("root");
  root.addContent(new Comment("this is my comment!"));
  document.setRootElement(root);
  
  Element people = new Element("person");
  people.setAttribute(new Attribute("number","1"));
  Element element1 = new Element("name");
  element1.setText("zhangsan");
  Element element2 = new Element("age");
  element2.setText("12");
  Element element3 = new Element("birthday");
  element3.setText("2011-11-11");
  
  Element element4 = new Element("address");
  element4.addContent(new Element("country").setText("China"));
  element4.addContent(new Element("city").setText("nanchang"));
  element4.addContent(new Element("street").setText("bayiguangchang"));
  people.addContent(element1).addContent(element2).addContent(element3).addContent(element4);
  root.addContent(people);
 
  Format format = Format.getPrettyFormat();
  format.setIndent("    ");
  XMLOutputter outputter = new XMLOutputter(format);
  outputter.output(document,new FileOutputStream("jdom.xml"));
 }
}

2:

public class JdomTest2 {

public static void main(String[] args) throws Exception {
  SAXBuilder builder = new SAXBuilder();
  Document document = builder.build(new File("jdom.xml"));
  Element root = document.getRootElement();
  
  System.out.println("root: "+root.getName());
  List list =  root.getChildren();
  for (int i = 0; i < list.size(); i++) {
   Element element = (Element)list.get(i);
   System.out.println(element.getName());
  }
  List<Attribute> attrs =  attrs = root.getChild("person").getAttributes();
  for(Attribute attr : attrs){
   System.out.println(attr.getName()+"="+attr.getValue());
  }
  
  Element element = root.getChild("person").getChild("address");
  element.removeContent();
  element.addContent("China");
  
  
  XMLOutputter outputter = new XMLOutputter(Format.getPrettyFormat().setIndent("    "));
  outputter.output(document,new FileOutputStream("jdom2.xml"));
  
 }
}

3:

package cn.huaxia.xml.jdom;

import java.io.FileWriter;

import org.jdom.Attribute;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;

public class JdomTest3 {
 public static void main(String[] args) throws Exception
 {
  Document document = new Document();

Element root = new Element("联系人列表").setAttribute(new Attribute("公司",
    "A集团"));

document.addContent(root);
  
  Element contactPerson = new Element("联系人");
  
  root.addContent(contactPerson);

contactPerson
    .addContent(new Element("姓名").setText("张三"))
    .addContent(new Element("公司").setText("A公司"))
    .addContent(new Element("电话").setText("021-55556666"))
    .addContent(
      new Element("地址")
        .addContent(new Element("街道").setText("5街"))
        .addContent(new Element("城市").setText("上海"))
        .addContent(new Element("省份").setText("上海市")));
  XMLOutputter output = new XMLOutputter(Format.getPrettyFormat()
    .setIndent("    ").setEncoding("gbk"));

output.output(document, new FileWriter("contact.xml"));

}
}

Dom4J:

1:

public class Dom4JTest {

public static void main(String[] args) throws Exception {
  Document document = DocumentHelper.createDocument();
  Element element = DocumentHelper.createElement("root");
  document.setRootElement(element);
  Element element2 = element.addElement("student");
  Element element3 = element2.addElement("name");
  Element element4 = element2.addElement("age");
  Element element5 = element2.addElement("sex");

element3.setText("johnny");
  element4.setText("11");
  element5.setText("男");

OutputFormat format = new OutputFormat("  ", true, "UTF-8");
  XMLWriter writer = new XMLWriter(format);
  writer.write(document);

XMLWriter writer2 = new XMLWriter(new FileOutputStream("student2.xml"),
    format);
  writer2.write(document);

OutputStreamWriter fileWriter = new OutputStreamWriter(new FileOutputStream(
    "student3.xml"), "utf-8");
  System.out.println(fileWriter.getEncoding());
  XMLWriter writer3 = new XMLWriter(fileWriter, format);
  writer3.write(document);
  writer3.flush();
  //writer3.close();

}
}

2:

public class Dom4JTest2 {

public static void main(String[] args) throws Exception {
  System.out.println("---------------SAXReader----------------------");
  SAXReader saxReader = new SAXReader();
  Document document = saxReader.read(new File("student2.xml"));

Element element = document.getRootElement();
  System.out.println("root element name: " + element.getName());

List<Element> list = element.elements();
  System.out.println(list.size());

for (Iterator iterator = element.elementIterator(); iterator.hasNext();) {
   Element element2 = (Element) iterator.next();
   System.out.println(element2.getName());
  }

Element element3 = element.element("student");
  List<Element> sunElement = element3.elements();
  for (Element element2 : sunElement) {
   System.err.println(element2.getName() + " : " + element2.getText());
  }

DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory
    .newInstance();
  DocumentBuilder documentBuilder = documentBuilderFactory
    .newDocumentBuilder();
  org.w3c.dom.Document document2 = documentBuilder.parse(new File(
    "student.xml"));
  System.out.println("---------------DOMReader----------------------");
  DOMReader domReader = new DOMReader();
  Document document3 = domReader.read(document2);
  Element rootElement = document3.getRootElement();
  System.out.println(rootElement.getName());

}
}