java - Javaでxmlを解析する際にDTDを無視する

Question

以下のxmlを処理しています:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE CASE SYSTEM "C:\Users\user123\Desktop\demo.dtd">
<INFO>
  <NAME>John Smith</NAME>
  <BUSINESSNAME>Smith</BUSINESSNAME>
</INFO>

しかし、私は無視しなければなりません

<!DOCTYPE CASE SYSTEM "C:\Users\user123\Desktop\demo.dtd"> because in presence of this parsing is giving error.

これは私のコードです:

        StringBuilder sb = new StringBuilder();
        File xmlFile = new File("C:/Users/Desktop/demo.xml");

        BufferedReader br = new BufferedReader(new FileReader(xmlFile));
        String line = null;
        while((line = br.readLine())!= null){
            if(line.indexOf("&") != -1)
            {
                line = line.replaceAll("&","&");
            }
                sb.append(line);
        }
        br.close();

        BufferedWriter bw = new BufferedWriter(new FileWriter(xmlFile));

        Source xmlInput = new StreamSource(new StringReader(sb.toString()));
        StringWriter stringWriter = new StringWriter();
        StreamResult xmlOutput = new StreamResult(stringWriter);
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        transformerFactory.setAttribute("indent-number", 2);
        Transformer transformer = transformerFactory.newTransformer(); 
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.transform(xmlInput, xmlOutput);


        bw.write(xmlOutput.getWriter().toString());
        bw.close();
        System.out.println("success");

助言がありますか？