SAX解析XML问题 - Java / Web 开发

test.xml文件内容：
<?xml version="1.0" encoding="UTF-8"?> 
<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>

MyXMLReader.java文件内容：
import org.xml.sax.*;
import org.xml.sax.helpers.*;
import javax.xml.parsers.*;

public class MyXMLReader extends DefaultHandler {

java.util.Stack tags = new java.util.Stack();

public MyXMLReader() {
super();
}

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);
} catch (Exception e) {
e.printStackTrace();
}

System.out.println("运行时间：" + (System.currentTimeMillis() - lasting)
+ "毫秒");
}

public void characters(char ch[], int start, int length)
throws SAXException {
String tag = (String) tags.peek();
if (tag.equals("NO")