回音壁

所需包：stax-1.2.0.jar、jsr173_07_api.jar、jsr173_07_ri.jar

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;

public class WellFormPrint {
public static void main(String[] args) {
int top = 0;
long start = System.currentTimeMillis();
try {
XMLInputFactory inputFactory = 
	XMLInputFactory.newInstance();
InputStream input = new FileInputStream(
	new File("Players.xml"));
MXParser xmlStreamReader = (MXParser)inputFactory
	.createXMLStreamReader(input);
int event = xmlStreamReader.getEventType();
while (true) {
switch (event) {
case XMLStreamConstants.START_ELEMENT:

top++;
for(int i=0; i<top-1; i++)
	echo("  ");
echo("<" + xmlStreamReader.getLocalName());	
for (int i = 0, n = 
	xmlStreamReader.getAttributeCount(); 
	i < n; ++i)
  echo(" " + xmlStreamReader.getAttributeName(i)
	+ "="
	+ xmlStreamReader.getAttributeValue(i));
echo(">\n");					
break;

case XMLStreamConstants.CHARACTERS:

if (xmlStreamReader.isWhiteSpace())
	break;
for(int i=0; i<top; i++)
	echo("  ");
echo(xmlStreamReader.getText() + "\n");
break;

case XMLStreamConstants.END_ELEMENT:

for(int i=0; i<top-1; i++)
	echo("  ");
echo("</" + xmlStreamReader.getLocalName()
	+ ">\n");
top--;
break;

case XMLStreamConstants.COMMENT:

for(int i=0; i<top; i++)
	echo("  ");
echoln("<!--" 
	+ xmlStreamReader.getText() + "-->");

}
if (!xmlStreamReader.hasNext())
	break;

event = xmlStreamReader.next();
}

} catch (Exception e) {
e.printStackTrace();
}
long end = System.currentTimeMillis();
echo("\ntotal : " + (end - start));
}

public static void echo(String str) {
System.out.print(str);
}

public static void echoln(String str) {
System.out.println(str);
}
}