Printing the hardcopy of your report using a Java Swing application

This recipe teaches you how to use JasperReports to print a hardcopy of your Jasper report from within a Java Swing application.

Getting ready

Refer to the installPostgreSQL.txt file included in the source code download for this chapter to install and run PostgreSQL, which should be up and running before you proceed.

The source code for this chapter also includes a file named copySampleDataIntoPGS.txt, which helps you create a database named jasperdb9 and copy sample data for this recipe into the database.

You will need Java Development Kit (JDK) version 1.6.X to compile and run the Java Swing application of this recipe. You will find all the necessary downloads and instructions on Sun's official website. After installing JDK, you will also set the JAVA_HOME environment variable to point to the main folder of your JDK installation (..jdk1.6.X).

You will be using a JRXML file named MonthlyCustomerReport.jrxml and three Java files named ConnectionManager.java, JasperReportsWrapper.java, and JasperReportsPrinter.java in this recipe. You will find these three files in the Task3 folder of the source code download for this chapter. In addition, you will also find two .bat files named compile.bat and run.bat, along with two folders named com and lib in the same Task3 folder. Copy all five files and the com and lib folders (along with their contents) to the C:JasperReportsCookBookSamples folder on your PC.

In order to compile JasperReportsPrinter.java, you will need the following seven JAR files:

  • jasperreports-3.6.0.jar
  • commons-beanutils-1.8.0.jar
  • commons-collections-3.2.1.jar
  • commons-digester-1.7.jar
  • commons-logging-1.1.jar
  • groovy-all-1.5.5.jar

Your JasperReportsPrinter.java will compile with these seven JAR files, but your complete application will not run without the JDBC JAR file that contains the driver for PostgreSQL. The name of the JAR file is postgresql-8.2-506.jdbc3.jar. You can download PostgreSQL JDBC driver from http://jdbc.postgresql.org/download.html. You can also find this postgresql-8.2-506.jdbc3.jar file in the ...JaspersoftiReport-nb-3.Xide8modulesext folder of your iReport installation.

Once you have all the JAR files ready, you will put them in the C:JasperReportsCookBookSampleslib folder on your PC. The compile.bat and run.bat files assume that all JAR files are located in C:JasperReportsCookBookSampleslib folder.

How to do it...

Let's learn how to insert printing capability into a Java Swing application for JasperReports.

  1. Browse to the C:JasperReportsCookBookSamples folder on your PC into which you copied files from the Task3 folder of the source code for this chapter.
  2. Double-click the compile.bat file. A command prompt will appear. It will compile JasperReportsPrinter.java and show the compilation results. After successful compilation, dismiss the command prompt by clicking the Close button on its top-right corner. Now you will see that a JasperReportsPrinter.class file will appear in the C:JasperReportsCookBookSamplescom folder.
    How to do it...
  3. Now double-click the run.bat file to execute the compiled JasperReportsPrinter.class file. A command prompt will appear, which will later show a GUI window containing a Print Hard Copy button. When you click the Print Hard Copy button, you will see Your report compile successfully and Your report filled with application data messages on the command prompt. Dismiss the command prompt by clicking the Close button.
    How to do it...
  4. Open the JasperReportsPrinter.java file from the C:JasperReportsCookBookSamples folder on your PC in a text editor. The JasperReportsPrinter.java file contains the code for a class named JasperReportsPrinter. You will find three methods named initComponents(), jButtonActionPerformed(), and printHardCopy() in the JasperReportsPrinter class. The initComponents() method initializes all the required components and the jButtonActionPerformed() method handles the action when the Print Hard Copy button is clicked. You are about to write code for the third method named printHardCopy(). This method will print a hard copy of your JasperReport.
  5. Edit JasperReportsPrinter.java by typing the following code in the printHardCopy() method:
    // Print Jasper report
if (jasperPrint != null)
{
try {
JasperPrintManager.printReport(jasperPrint, true);
} catch (JRException ex) {
ex.printStackTrace();
}
}
else
System.out.println ("Report printing failed");

    After adding the code, the printReport() method will become: 

    public void printHardCopy()
{
// Create wrapper instance and connect to DB
JasperReportsWrapper wrapper = new JasperReportsWrapper(); Connection connection = wrapper.connect2DB( wrapper.dbServerAdd, wrapper.dbServerPort, wrapper.dbName, wrapper.dbUser, wrapper.dbPass);

                                // Compile and fill Jasper report with application data
JasperPrint jasperPrint = wrapper.fillReport( wrapper.compileJRXMLFile ( wrapper.path2JRXMLFile), null, connection);
// Print Jasper report

if (jasperPrint != null)
{
try {
JasperPrintManager.printReport(jasperPrint, true);
} catch (JRException ex) {
ex.printStackTrace();
}
}
else
System.out.println ("Report printing failed");
}

    Save the JasperReportsPrinter class.

  6. Double-click the compile.bat file to compile the JasperReportsPrinter class. A command prompt will appear. It will compile JasperReportsPrinter.java and show the compilation results. Click the Close button to dismiss it.
  7. Double-click the run.bat file. It will execute your compiled Java application to show the same GUI window that your saw earlier in step 3. Click the Print Hard Copy button, and a Print dialog will appear. Click the OK button. Your JasperReport will be sent to printer for printing. Click the Close button on the top-right corner of the GUI as well as the command prompt to dismiss both.
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