XML的SAX接口编程实例

这个例子展示了如何用SAX接口来解析XML文档

下面是我要解析的文档emp.xml

<?xml version="1.0"?>
<employs>
<employ>
<name>aaa</name>
<age>33</age>
<sex>m</sex>
<tel>88881234</tel>
<img>1.jpg</img>
</employ>
<employ>
<name>bbb</name>
<age>35</age>
<sex>m</sex>
<tel>88882345</tel>
<img>2.jpg</img>
</employ>
<employ>
<name>ccc</name>
<age>24</age>
<sex>f</sex>
<tel>888845657</tel>
<img>3.jpg</img>
</employ>
<employs>

我使用的开发环境是Jbuilder5,下面就是java程序

import java.io.IOException;
import org.xml.sax.*;
import org.xml.sax.helpers.*;
import org.apache.xerces.parsers.SAXParser;
import java.util.Stack;

public class XmlToHtml extends DefaultHandler {

String strName;
String strAge;
String strSex;
String strTel;
String strImage;

private Stack stackName=new Stack();
private Stack stackAge=new Stack();
private Stack stackSex=new Stack();
private Stack stackTel=new Stack();
private Stack stackImage=new Stack();
private int flag;

  public static void main(String[] argv) {

    if (argv.length != 1) {
      System.out.println("Usage: java XmlToHtml [URI]");
      System.exit(0);
    }
    String uri = argv[0];

    try {
      XMLReader parser = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
      XmlToHtml XmlToHtmlInstance = new XmlToHtml();
      parser.setContentHandler(XmlToHtmlInstance);
      parser.parse(uri);
    }
    catch(IOException ioe) {
      ioe.printStackTrace();
    }
    catch(SAXException saxe) {
      saxe.printStackTrace();
    }

  }
  public void characters(char[] ch, int start, int length) throws SAXException {
    String s = new String(ch, start, length);
    if (ch[0] == '\n')
     return;
    if(flag==1)
      {stackName.push(s);}
    else if(flag==2)
      {stackAge.push(s);}
    else if(flag==3)
      {stackSex.push(s);}
    else if(flag==4)
      {stackTel.push(s);}
    else if(flag==5)
      {stackImage.push(s);}

  }
  public void endDocument() throws SAXException {
    for (int count=stackName.size()-1;count>=0;count--){

      String strName=stackName.elementAt(count).toString();
      String strAge=stackAge.elementAt(count).toString();
      String strSex=stackSex.elementAt(count).toString();
      String strTel=stackTel.elementAt(count).toString();
      String strImage=stackImage.elementAt(count).toString();
      System.out.println(strName+" "+strAge+" "+strSex+" "+strTel+" "+strImage+"");
       //输出解析后的数据
    }
  }

  public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
    if(localName.equals("name" ))
       {flag=1;}
    else if (localName.equals("age"))
       {flag=2;}
    else if(localName.equals("sex"))
       {flag=3;}
    else if(localName.equals("tel"))
       {flag=4;}
    else if(localName.equals("img"))
       {flag=5;}

  }
}

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