LOAD IMAGES DYNAMICALLY INTO JASPER REPORTS

If you want to insert images from the file system (e.g. C:\images folder) into jasper reports at runtime, for example changing a logo depending on user selection or simply allowing the user to browse for his or her image to be displayed  in the report then here is a simple process of doing that.

Let start with the report design using ireport. In this instance the picture will be passed to the report as a parameter.

So let’s create a parameter in our report and call it “photo”

image

As shown in the picture above, the data type of our parameter should be “java.lang.Object”

After this, drag the image , from the tool bar, on to your report.Right click on the image and choose “Properties” from the menu

image

Under the image tab of the dialog box, make sure you select “java.awt.image” for the Image Expression Class. Once this is done, you are done with the report design

Lets go to netbeans , do some coding and connect our designed report to a java application.

First we need to declare a variable of type image,

Image photo;

Also we create a method , which on click of a button, loads a picture from the file system and initializes the “photo: variable.

JFileChooser fc = new JFileChooser();

private void getPicture() {

fc.setFileFilter(new FileNameExtensionFilter("Images", "jpg", "gif", "bmp"));

if (fc.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {

fc.setCurrentDirectory(fc.getCurrentDirectory());

ImageIcon icon = new ImageIcon(fc.getSelectedFile().getAbsolutePath());

icon = new ImageIcon(icon.getImage().getScaledInstance(350, 350, Image.SCALE_DEFAULT));

photo = icon.getImage();

}

After getting our picture, create an instance of the Map class and pass our “variable” as a parameter.

Map<String, Object> param = new HashMap<String, Object>();

param.put("photo", photo); //the “photo” should be the same name as the parameter name in our report

We then create a method that passes our created parameter to the report and we are done. below is the method that does the job.

private void generateReports(String name, Map param) {

try {

String source = "C:/sabonay/jasperreports/" + name + ".jrxml";

if (new File(source).exists() == false) {

xputils.showMessage("Please  report Source does not exist");

return;

}

JasperReport jasperReport = JasperCompileManager.compileReport(source);

JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, param, new JREmptyDataSource());

JasperViewer.viewReport(jasperPrint, false);

//the false parameter makes sure the application does not close on closing the report

} catch (Exception e) {

System.out.println("reports Error " + e.toString());

}}

Make sure to reference the necessary jasper jar files in your application

Advertisements

CREATING A JASPER REPORT WITHOUT A DATASOURCE

If you want to generate jasper reports in your JAVA applications without using a data source, then here is your stop. For example printing receipts directly from user inputs, where all you need are parameters. Also this piece talks about how to insert images from the file system ( hard drives pen dirves) into jasper reports at runtime.It assumed you know how to generate reports with jasper reports. This help was created using Netbeans 6.7 and iReport 3.5.2

Relax and Enjoy!!!!!!!!!!!!!!!

In this our example, we are creating a report that requires a name, hometown and a picture from the user at runtime to be displayed on our report. Design your report by creating the parameters; name as string, hometown as string and picture as object. With the name and hometown parameters, you can drag them onto the report interface, but for the image, drag  the image item from the tool bar and bind it to the picture parameter. Below is a picture of the report

the report designed in iReport

After this, go to Netbeans and do some simple coding. Below are the methods needed to run your application. Make sure to add the Jasper jar files to your application

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {

// a method to generate the report, by assigning the prameter to their value, and calling te generate report method

Map<String, Object> param = new HashMap<String, Object>();

param.put("name", this.tfName.getText());

param.put("hometown", this.tfHometown.getText());

param.put("photo", photo);

generateReports("report1", ls, param);

}

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

// a mehod t browse for an image to be inserted into te report

//photo is a variable of type image

fc.setFileFilter(new FileNameExtensionFilter("Images", "jpg", "gif", "bmp"));

if (fc.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {

fc.setCurrentDirectory(fc.getCurrentDirectory());

ImageIcon icon = new ImageIcon(fc.getSelectedFile().getAbsolutePath());

icon = new ImageIcon(icon.getImage().getScaledInstance(350, 350, Image.SCALE_DEFAULT));

photo = icon.getImage();

}

}

private void generateReports(String name, Collection data, Map param) {

//a method to generate th report

try {

String source = "C:/sabonay/jasperreports/" + name + ".jrxml";

if (new File(source).exists() == false) {

xputils.showMessage("Please go report file does not exst");

return;

}

JasperReport jasperReport = JasperCompileManager.compileReport(source);

JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, param, new    JREmptyDataSource());

JasperViewer.viewReport(jasperPrint, false);

} catch (Exception e) {

e.printStackTrace();

System.out.println("reports Error  " + e.toString());

}

}

Below are pictures after running theappliation

using entering parameter values
Sample report generated