xmltest.java

java操作xml的源代码

package java_xml;






/*
import java.io.*;
import java.util.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import java.lang.Exception;
public class  xmlTest
{
    Vector student_Vector = new Vector();
    public static void main(String[] args) {
        xmlTest xmlTest = new xmlTest();
        xmlTest.student_Vector = new Vector();
        System.out.println("start reading");
        try {
            xmlTest.readXMLFile("myXml.xml");
            System.out.println("read over,start writing");
            xmlTest.writeXMLFile("Output.xml");
            System.out.println("write over");
        } catch (Exception e) {
            System.out.println("error");
        }

    }
}
 private void readXMLFile(String inFile) throws Exception{
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  DocumentBuilder db = null;
  try
  {
   db = dbf.newDocumentBuilder();
  }
  catch (ParserConfigurationException pce)
  {
   System.err.println(pce);
   System.exit(1);
  }
  Document doc = null;
  try
  {
   doc=db.parse(inFile);
  }
  catch (DOMException dom)
  {
   System.err.println(dom.getMessage());
   System.exit(1);
  }
  catch(IOException ioe){
   System.err.println(ioe);
   System.exit(1);
  }
  Element root = doc.getDocumentElement();
  NodeList students = root.getElementsByTagName("student");
  for(int i=0;i<students.getLength();i++){
   Element student = (Element)students.item(i);
   myXmlBean stuBean = new myXmlBean();
   stuBean.setSex(student.getAttribute("sex"));
   NodeList names = student.getElementsByTagName("name");
   if(names.getLength()==1){
    Element e = (Element)names.item(0);
    Text t = (Text)e.getFirstChild();
    stuBean.setName(t.getNodeValue());
   }
   NodeList ages = student.getElementsByTagName("age");
   if(ages.getLength()==1){
    Element e = (Element)ages.item(0);
    Text t = (Text)e.getFirstChild();
    stuBean.setAge(t.getNodeValue());
   }
   NodeList phones=student.getElementsByTagName("phone");
   if(phones.getLength()==1){
    Element e = (Element)phones.item(0);
    Text t = (Text)e.getFirstChild();
    stuBean.setPhone(t.getNodeValue());
   }
   student_Vector.add(stuBean);
  }
 }

 private void writeXMLFile(String outFile) throws Exception{
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  DocumentBuilder db = null;
  try
  {
   db = dbf.newDocumentBuilder();
  }
  catch (ParserConfigurationException pce)
  {
   System.err.println(pce);
   System.exit(1);
  }

  Document doc = db.newDocument();
  Element root = doc.createElement("write_studentInfo");
  doc.appendChild(root);
  for (int i = 0; i < student_Vector.size(); i++) {
   myXmlBean myXmlBean = (myXmlBean) student_Vector.get(i);
   Element student = doc.createElement("write_student");
   student.setAttribute("write_sex", myXmlBean.getSex());
   root.appendChild(student);
   Element name = doc.createElement("write_name");
   student.appendChild(name);
   Text tName = doc.createTextNode(myXmlBean.getName());
   name.appendChild(tName);
   Element age = doc.createElement("write_age");
   student.appendChild(age);
   Text tAge = doc.createTextNode(String.valueOf(myXmlBean.getAge()));
   age.appendChild(tAge);
   Element phone = doc.createElement("write_phone");
   student.appendChild(phone);
   Text tPhone = doc.createTextNode(myXmlBean.getPhone());
   phone.appendChild(tPhone);
   FileOutputStream outStream = new FileOutputStream(outFile);
   OutputStreamWriter outWriter = new OutputStreamWriter(outStream);
   ((XmlDocument) doc).write(outWriter, "shift_jis");
   outWriter.close();
   outStream.close();
   */