XML格式转化工具类

基于dom4j的XML格式转化类
package com.lixi.util;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import org.dom4j.Document;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
/**
* <p>Title: </p>
* <p>Description: XML格式转化工具</p>
* <p>Copyright: Copyright (c) 2010-02-05</p>
* <p>Company: </p>
* @author li.xi
* @version 1.0
*/
public class XmlHelper {
public XmlHelper() {
}

/**
* String格式的XML转Document
* @param xml
* @param charSet 字符集编码设置 如：GBK
* @return Document
* @throws Exception
*/
public static Document buildDoc(String xml, String charSet)
throws Exception {
InputStream inputStream = new ByteArrayInputStream(xml.getBytes());
SAXReader reader = new SAXReader();
InputStreamReader inputStreamReader = new InputStreamReader(
inputStream, charSet);
Document document = reader.read(inputStreamReader);
inputStreamReader.close();
return document;
}
/**
* Document格式的XML转String
* @param document
* @param charSet 字符集编码设置
* @return String
* @throws Exception
*/
public static String setCharSet(Document document, String charSet)
throws Exception {
OutputFormat format = OutputFormat.createPrettyPrint();
format.setEncoding(charSet);
ByteArrayOutputStream fos = new ByteArrayOutputStream();
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos,
charSet));
XMLWriter writer = new XMLWriter(bw, format);
writer.write(document);
bw.close();
String restr = fos.toString();
fos.close();
return restr;
}
}