PDF Generation Using Templates and OpenOffice and Itext in Java


Recently i had a task where in i had to create PDF dynamically by merging data and template. I have been using lots of pdf libraries since i started my programming to do such tasks. The previous one i admired a lot was Jasper Reports. But after researching some more time i found out that IText with Openoffice Draw is a simplest way we can generate PDF forms.

This visual tutorial first Explain’s how to Create PDF forms in Openoffice Draw

Save PDF to folder where you have your program or just change path for input source in program

Now here is java code which can convert this pdf to final pdf by filling in Values using IText

/**
 *
 */
package com.linkwithweb.reports;

import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;

/**
 * @author Ashwin Kumar
 *
 */
public class ITextStamperSample {

	/**
	 * @param args
	 * @throws IOException
	 * @throws DocumentException
	 */
	public static void main(String[] args) throws IOException,
			DocumentException {
		// createSamplePDF();
		generateAshwinFriends();
	}

	/**
	 *
	 */
	private static void generateAshwinFriends() throws IOException,
			FileNotFoundException, DocumentException {
		PdfReader pdfTemplate = new PdfReader("mytemplate.pdf");
		FileOutputStream fileOutputStream = new FileOutputStream("test.pdf");
		ByteArrayOutputStream out = new ByteArrayOutputStream();
		PdfStamper stamper = new PdfStamper(pdfTemplate, fileOutputStream);
		stamper.setFormFlattening(true);

		stamper.getAcroFields().setField("name", "Ashwin Kumar");
		stamper.getAcroFields().setField("id", "1\n2\n3\n");
		stamper.getAcroFields().setField("friendname",
				"kumar\nsirisha\nsuresh\n");
		stamper.getAcroFields().setField("relation", "self\nwife\nfriend\n");

		stamper.close();
		pdfTemplate.close();

	}

}

Here is sample pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.linkwithweb.reports</groupId>
  <artifactId>ReportTemplateTutorial</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>ReportTemplateTutorial</name>
  <description>ReportTemplateTutorial</description>
  <dependencies>
  	<dependency>
  		<groupId>com.lowagie</groupId>
  		<artifactId>itext</artifactId>
  		<version>2.1.7</version>
  	</dependency>
  </dependencies>
</project>

 

A pdf file with data filled in placeholders is created with name test.pdf


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Converting Documents with openoffice to Differrent Formats in Java

There is lots of requirements in most commercial projects to convert documents in various formats . For example

HTML —–> Pdf
Doc —–> Pdf
PPT —–> Images

etc

Openoffice has created a very versatile office software which is opensource and can be used in conversion of documents from one format to another

Here is one such example that Converts HTML to PDF. I used JodConverter which is one of the best libraries around which wraps complex openoffice interations with simple object oriented methods

/**
 * 
 */
package com.linkwithweb.converter;

import java.io.ByteArrayInputStream;
import java.io.OutputStream;
import java.net.ConnectException;

import com.artofsolving.jodconverter.DocumentConverter;
import com.artofsolving.jodconverter.DocumentFamily;
import com.artofsolving.jodconverter.DocumentFormat;
import com.artofsolving.jodconverter.openoffice.connection.OpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter;

/**
 * Prerequisites
 * %OPENOFFICE_HOME%/soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;" -nofirststartwizard
 * 
 * @author Ashwin Kumar
 * 
 */
public class OpenOfficeConverter {
	// connect to an OpenOffice.org instance running on port 8100
	private OpenOfficeConnection connection = null;

	/**
	 * @param oHTMLText
	 * @param oOutputStream
	 */
	public void convertFromHTMLToPDF(String oHTMLText,
			OutputStream oOutputStream) {
		try {
			DocumentFormat inputDocumentFormat = new DocumentFormat("HTML",
					DocumentFamily.TEXT, "text/html", "html");
			inputDocumentFormat.setExportFilter(DocumentFamily.TEXT,
					"HTML 	(StarWriter)");
			DocumentFormat outputDocumentFormat = new DocumentFormat(
					"Portable	Document Format", DocumentFamily.TEXT,
					"application/pdf", "pdf");
			outputDocumentFormat.setExportFilter(DocumentFamily.TEXT,
					"writer_pdf_Export");
			DocumentConverter oDocumentConverter = new OpenOfficeDocumentConverter(
					connection);
			oDocumentConverter.convert(
					new ByteArrayInputStream(oHTMLText.getBytes()),
					inputDocumentFormat, oOutputStream, outputDocumentFormat);
		} catch (Exception e) {
			// TODO: handle exception
		}
	}

	/**
	 * 
	 */
	public void openConnection() {
		try {
			if (connection == null || !connection.isConnected())
				connection = new SocketOpenOfficeConnection(8100);
			connection.connect();
		} catch (ConnectException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	/**
	 * 
	 */
	public void openConnection(String host, int port) {
		try {
			if (connection == null || !connection.isConnected())
				connection = new SocketOpenOfficeConnection(host, port);
			connection.connect();
		} catch (ConnectException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	/**
	 * 
	 */
	public void closeConnection() {
		// close the connection
		try {
			if (connection != null && connection.isConnected())
				connection.disconnect();
		} catch (Exception e) {
			// TODO: handle exception
		}
	}
}

Now to Use above Method Here is sample Code

/**
 * 
 */
package com.linkwithweb.converter;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * @author Ashwin Kumar
 * 
 */
public class HTMLToPDFConverter {

	public static void main(String[] args) {

		String strHindiHTML = "Hello hi tehrere<h1>heading</h1>";
		OpenOfficeConverter oOpenOfficeConverter = new OpenOfficeConverter();
		oOpenOfficeConverter.openConnection();
		OutputStream out = null;
		try {
			out = new FileOutputStream("test.pdf");

			oOpenOfficeConverter.convertFromHTMLToPDF(strHindiHTML, out);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (Throwable th) {
			// TODO Auto-generated catch block
			th.printStackTrace();
		} finally {
			if (out != null) {
				try {
					out.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
		oOpenOfficeConverter.closeConnection();
		/*
		 * ByteArrayOutputStream oByteArrayOutputStream = new ByteArrayOutputStream();
		 * 
		 * ByteArrayInputStream oByteArrayInputStream = new ByteArrayInputStream(
		 * oByteArrayOutputStream.toByteArray());
		 */
	}

}

Below is sample Maven Configuration to Build the project


<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.linkwithweb.documents</groupId>
	<artifactId>DocumentConverter</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>DocumentConverter</name>
	<description>DocumentConverter</description>
	<dependencies>
		<dependency>
			<groupId>com.artofsolving</groupId>
			<artifactId>jodconverter</artifactId>
			<version>2.2.1</version>
		</dependency>
		
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>1.6.1</version>
		</dependency>		

	</dependencies>

	<build>
		<finalName>DocumentConverter</finalName>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.3.1</version>
				<configuration>
					<source>1.5</source>
					<target>1.5</target>
				</configuration>
			</plugin>
			<plugin>
				<groupId>com.artofsolving</groupId>
				<artifactId>jodconverter-maven-plugin</artifactId>
				<version>2.2.1</version>
				<configuration>
					<sourceDirectory>${basedir}/src/site/resources</sourceDirectory>
					<outputDirectory>${project.reporting.outputDirectory}</outputDirectory>
					<include>**/*.odt</include>
					<outputFormat>pdf</outputFormat>
				</configuration>
				<executions>
					<execution>
						<id>convert </id>
						<phase>site</phase>
						<goals>
							<goal>convert</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>

	<properties>
		<org.easymock.version>2.3</org.easymock.version>
		<org.springframework.version>2.5.6</org.springframework.version>
		<commons.lang.version>2.1</commons.lang.version>
		<log4j.version>1.2.14</log4j.version>
		<org.freemarker.version>2.3.15</org.freemarker.version>
		<manifest.file>src/main/resources/META-INF/MANIFEST.MF</manifest.file>
	</properties>
</project>

Attached is sample Project. Rename it to .rar file

DocumentConverter(Rename Extension to .rar)