JasperReports API. Getting error when using Image in report: net.sf.jasperreports.engine.JRException: Byte data not found at

Question

I want to print a JasperReports 's report via Java.

So I wrote a code as follows

 try {
            String r ="C:\\ireport\\Foods.jrxml";
            JasperReport jr =JasperCompileManager.compileReport(r);
            JasperPrint jp = JasperFillManager.fillReport(jr, null, conn);
            JasperViewer.viewReport(jp);
        } catch(Exception e) {
            System.out.println(e);
        }

But when I run the program I got following error.

net.sf.jasperreports.engine.JRException: Byte data not found at : flower1.png

I searched about this error in jasper community but I can't get understand the way they have explained the solution since I'm atotally newbie to the programming. So can anyone give me a solution please?

My jrxml had following code snippet

<imageExpression><![CDATA["flower1.png"]]></imageExpression>

Answer 1

The good way it to use report's parameter for passing the image. And I believe that passing image as BufferedImage object is a good choice in your case.

The sample of usage

The Java code snippet

Map<String, Object> parameters = new HashMap<>();
try (InputStream inputStream = YourClass.class.getClassLoader().getResourceAsStream("images/flower1.png")) {
    parameters.put("flowerImage", ImageIO.read(new ByteArrayInputStream(JRLoader.loadBytes(inputStream))));
} catch (JRException | IOException e) {
     throw new RuntimeException("Failed to load images", e);
}
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, connection);

The snippet of jrxml file

<parameter name="logoImage" class="java.awt.Image"/>
...
<image scaleImage="FillFrame">
    <reportElement x="10" y="0" width="224" height="43"/>
    <imageExpression><![CDATA[$P{flowerImage}]]></imageExpression>
</image>

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1. The more information about using images you can find here

2. Info about reading resources with Java and where to store it:

   • Different ways of loading a file as an InputStream

   • How to read properties file in web application?

   • Where to place and how to read configuration resource files in servlet based application?

3. Info about how to read image with Java :

   • How do I properly load a BufferedImage in java?