saxparser1_old.java

一个java的解析xml的例子

package xmlsax;

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

public class SaxParser1 extends DefaultHandler {
  private java.util.Stack  tagStack=new java.util.Stack();
  private String resultXML="";
  private String indent="";
  private static final java.lang.String NEWLINE=System.getProperty("line.separator");
  private PrintWriter printFile=null;
  String[] res =new String[10];
  int len = 0,sel;
  String sbname,tag;

  public static void main(String[] argv) {
    if (argv.length != 1) {
      System.out.println("Usage: java SaxParser1 [URI]");
      System.exit(0);
    }
    String uri = argv[0];
    try {
      XMLReader parser = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
      SaxParser1 SaxParser1Instance = new SaxParser1();
      parser.setContentHandler(SaxParser1Instance);
      parser.parse(uri);
    }
    catch(IOException ioe) {
      ioe.printStackTrace();
    }
    catch(SAXException saxe) {
      saxe.printStackTrace();
    }
  }

  public String[] sTOc(String temp){
    String[] res =new String[10];
    StringTokenizer st = new StringTokenizer(temp);
    len = 0;
    while(st.hasMoreTokens())
      res[len++] = st.nextToken() + " " + sbname;
    return res;
  }

  private int selectSb(String[] sb) {
    int i;
    String s = "";
    String ask = "\n确认请按回车,或选择其它";
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

    System.out.println("请在下列" + sbname + "类型中选择一种\n");
    for(i=0;i<len;i++)
      System.out.println("        " + i +"."+ sb[i] + "\n");
    i=0;
    System.out.println("请输入0 -- " + (len-1) + "(直接回车，默认选择0)：");
    try {
      s = in.readLine();
      Integer tt=new java.lang.Integer(0);
      while ( s.length() != 0) {
      	i=tt.valueOf(s).intValue();
        if(i<len && i>=0)
            System.out.println("您选择的" + sbname + "是: " + sb[i] + "\n" + ask + sbname);
        else
            System.out.println("错误的选择!!");
        s = in.readLine();
      }
    } catch (IOException e) {
        e.printStackTrace();
      }
    return i;
  }

  private String locateValue(String tagName) {
    return sbname;
  }

    /**@todo: Implement this characters method*/
  public void characters(char[] ch, int start, int length) throws SAXException {
    String value = new String(ch, start, length);
    //throw new java.lang.UnsupportedOperationException("Method characters() not yet implemented.");
  }

    /**@todo: Implement this endDocument method*/
  public void endDocument() throws SAXException {
    try {
      printFile=new PrintWriter(new FileWriter("resle.txt"));
      printFile.print(resultXML);
      printFile.close();
    }
    catch(IOException e) {
      System.out.println("打开 resle.txt 时出错:"+e);
    }
    System.out.println(resultXML);
  }

    /**@todo: Implement this endElement method*/
  public void endElement(String uri, String localName, String qName) throws SAXException {
    if(localName.equals("trnDef")) {
	}
	else if(localName.equals("Name")) {
		String tagName=(String)tagStack.pop();

		indent=indent.substring(0,indent.length()-4);
//                if (!(indent.length() == 8 && !res[sel].equals(tag)))
                  resultXML=resultXML+indent+"</"+tagName+">"+NEWLINE;
	}
  }

    /**@todo: Implement this startDocument method*/
  public void startDocument() throws SAXException {
  }

    /**@todo: Implement this startElement method*/
  public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
    if(localName.equals("trnDef")) {
	}
	else if(localName.equals("Name")) {
		String tagName=attributes.getValue(0);

                if (indent.length() == 4){
  		  String tagValue=attributes.getValue(1);
                  sbname = tagName;
                  res=sTOc(tagValue);
                  sel=selectSb(res);
                }
        	tagStack.push(tagName);
                tag = tagName + " " + sbname;
          System.out.println(res[sel]+"%"+tag+"%");
//                if (!(indent.length() == 8 && !res[sel].equals(tag)))
                    resultXML=resultXML+indent+"<"+tagName+">"+NEWLINE;
		indent+="    ";
	}
	else if(localName.equals("Values")) {
		String tagName=attributes.getValue(0);
		String tagValue=locateValue(tagName);
		if(!tagValue.equals("")) {
        		resultXML=resultXML+indent+"<"+tagName+">"+tagValue+"</"+tagName+">"+NEWLINE;
		}
	}
  }
}