writexml.java

一个实现了pascal语法的词法分析器

/*
 * Created on 2006-4-23
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package wordmachine;

/**
 * @author Administrator
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
import org.w3c.dom.*; 
import javax.xml.parsers.*; 
import javax.xml.transform.*; 
import javax.xml.transform.dom.DOMSource; 
import javax.xml.transform.stream.StreamResult; 
import java.io.*; 
public class WriteXml { 
private Document document; 
private String filename; 
private Element root;

public WriteXml(String name) throws ParserConfigurationException{ 
filename=name; 
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance(); 
DocumentBuilder builder=factory.newDocumentBuilder(); 
document=builder.newDocument(); 
root=document.createElement("root"); 
document.appendChild(root);
} 

public void toWrite(int t_lineNO,String t_string,String t_type){ 
Element token  = document.createElement("token");
Attr    lineNO = document.createAttribute("lineNO"); 
lineNO.setValue(String.valueOf(t_lineNO));
token.setAttributeNode(lineNO); 
Attr    string = document.createAttribute("string");
string.setValue(t_string);
token.setAttributeNode(string);
Attr    type  =document.createAttribute("type");
type.setValue(t_type);
token.setAttributeNode(type);
root.appendChild(token); 

} 
public void toSave(){ 
try{ 
TransformerFactory tf=TransformerFactory.newInstance(); 
Transformer transformer=tf.newTransformer(); 
DOMSource source=new DOMSource(document); 
transformer.setOutputProperty(OutputKeys.ENCODING,"GB2312"); 
transformer.setOutputProperty(OutputKeys.INDENT,"yes"); 
PrintWriter pw=new PrintWriter(new FileOutputStream(filename)); 
StreamResult result=new StreamResult(pw); 
transformer.transform(source,result); 
} 
catch(TransformerException mye){ 
mye.printStackTrace(); 
} 
catch(IOException exp){ 
exp.printStackTrace(); 
} 
} 

}