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Adding DOCTYPE to a XML File
Posted on: June 8, 2007 at 12:00 AM

In this section, you will learn to add a DOCTYPE to your XML file using the DOM APIs.

Adding DOCTYPE to a XML File

In this section, you will learn to add a DOCTYPE to your XML file using the DOM APIs.

Description of program:

The following program helps to add a DOCTYPE in your XML file. Program takes a XML file name on the console and it checks, the given file exists or not. If the given file exists then it is parsed using the parse() method and a Document object treee is created . Abstract class Transformer is used to transform a source tree into a xml file The setOutputProperty() method invokes to the Transformer object and sets the systemId and publicId to the DOCTYPE in the XML file.

Here is the XML File: Employee-Detail.xml

<?xml version = "1.0" ?>
<Employee-Detail>

<Employee>
<Emp_Id> E-001 </Emp_Id>
<Emp_Name> Vinod </Emp_Name>
<Emp_E-mail> Vinod1@yahoo.com </Emp_E-mail>
</Employee>

<Employee>
<Emp_Id> E-002 </Emp_Id>
<Emp_Name> Amit </Emp_Name>
<Emp_E-mail> Amit2@yahoo.com </Emp_E-mail>
</Employee>

<Employee>
<Emp_Id> E-003 </Emp_Id>
<Emp_Name> Deepak </Emp_Name>
<Emp_E-mail> Deepak3@yahoo.com </Emp_E-mail>
</Employee>

</Employee-Detail>

Here is the Java File: AddDocType.java


import java.io.*;

import javax.xml.parsers.*;

import org.w3c.dom.*;

import org.xml.sax.*;

import javax.xml.transform.*; 

import javax.xml.transform.dom.DOMSource; 

import javax.xml.transform.stream.StreamResult;



public class AddDocType{

  static public void main(String[] args){

  try{

  BufferedReader bf = new BufferedReader(

  new InputStreamReader(System.in));

  System.out.print("Enter XML file name: ");

  String xmlFile = bf.readLine();

  System.out.println();

  File file = new File(xmlFile);

  if (file.exists()){

  DocumentBuilderFactory factory = 

  DocumentBuilderFactory.newInstance();

  DocumentBuilder builder = factory.newDocumentBuilder();

  Document doc = builder.parse(xmlFile);

//  Create transformer

  Transformer tFormer = 

  TransformerFactory.newInstance().newTransformer();

//  Set system id

  tFormer.setOutputProperty(

  OutputKeys.DOCTYPE_SYSTEM, "systmId");

	

  Source source = new DOMSource(doc);

  Result result = new StreamResult(System.out);

  tFormer.transform(source, result);

  System.out.println();

  }

  else{

  System.out.println("File not found!");

  }

  }

  catch (Exception e){

  e.getMessage();

  }

  }

}

Download this example.

Output of this program:

XML docType SystemId and publicId

C:\vinod\xml>java AddDocType
Enter XML file name: Employee-Detail.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE Employee-Detail
PUBLIC "publicId" "systmId">
<Employee-Detail>
<Employee>
<Emp_Id> E-001 </Emp_Id>
<Emp_Name> Vinod </Emp_Name>
<Emp_E-mail> Vinod1@yahoo.com </Emp_E-mail>
</Employee>
<Employee>
<Emp_Id> E-002 </Emp_Id>
<Emp_Name> Sushil </Emp_Name>
<Emp_E-mail>Sushil@yahoo.com </Emp_E-mail>
</Employee>
<Employee>
<Emp_Id> E-003 </Emp_Id>
<Emp_Name> Amit </Emp_Name>
<Emp_E-mail> Amit@yahoo.com </Emp_E-mail>
</Employee>
</Employee-Detail>

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