DOM解析XML

public static Document loadFromFile(String fileName)
    {
        try {  //
            return loadFromStream(new FileInputStream(new File("e://abc//22,25.xml")));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
      
        return null;
    }

/**

*

*@param is

*/

private static Document loadFromStream(InputStream is)
    {
        Document xmlDoc = null;
        try
        {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            StringWriter sw = new StringWriter();
            for(String l = br.readLine(); l != null; l = br.readLine())
            {
                l = l.replaceAll("(G|g)(B|b)2312", "gbk");
                sw.write(l);
            }

            ByteArrayInputStream ss = new ByteArrayInputStream(sw.toString().getBytes());
            xmlDoc = builder.parse(ss);
        }
        catch(Exception e)
        {
            System.out.println(e.getMessage());
        }
        return xmlDoc;
    }