Today I will describe in short my latest and simplest quick and dirty trick, generating jasper report dynamically. Jasperberry is a component written very quickly to help me
generate pdf report in a situation where I don’t know the number of columns I will have, I don’t know their widths, the data they contain etc, all is generated at runtime dynamically.
I know that there is DynamicJasper project but it seems to be dead, and its dead in a very strange way, I mean, I see that the authors commit new code but there is no chance to get any support unless, I guess, you pay for it.
With dynamic jasper I couldn’t generate report with polish fonts displayed properly, tried many different tricks, no support on the forum, no support on stack overflow, no nothing. After 2 days I have realized that I will write my own library quicker to solve my problem than get an answer from the dynamic jasper community (if there is any).
So here we have: jasperberry!
Don’t expect too much from it but if you want to display simple table with data, dynamic columns, adjustable fonts and colors than this is it.
In fact you don’t have to even know object properties to generate the report, we will use Apache DynaBeans for that:
This is a simple example code snipped showing you how to get started with the simplest and most dynamic reporting library ever (as well as lacking features probably but we hope its enough for simple projects)
This example assumes the following:
1. You want simple report
2. You dont have to know the object which properties you want to display in advance, by this I mean you can create report columns dynamically, and by using apache dyna beans your objects don’t have to even exists. You just dynamically create them and inject them into the report.
Here is an example test class showing you how to use jasperberry, for more info please contact us directly at softberries.com
Code:
private static List<JBColumnBean> columns;
public JRXMLBuilderTest() {
}
@BeforeClass
public static void setUpClass() throws Exception {
columns = new ArrayList<JBColumnBean>();
JBColumnBean col1 = new JBColumnBean();
JBColumnBean col2 = new JBColumnBean();
JBColumnBean col3 = new JBColumnBean();
JBColumnBean col4 = new JBColumnBean();
JBColumnBean col5 = new JBColumnBean();
JBColumnBean col6 = new JBColumnBean();
JBColumnBean col7 = new JBColumnBean();
col1.setPreferredWidth(60);
col1.setProperty("name");
col1.setTitle("Imię");
col2.setPreferredWidth(60);
col2.setProperty("surname");
col2.setTitle("Nazwisko");
col3.setPreferredWidth(160);
col3.setProperty("comment");
col3.setTitle("Komentarz");
col4.setPreferredWidth(100);
col4.setProperty("comment2");
col4.setTitle("Komentarz");
col5.setPreferredWidth(100);
col5.setProperty("comment3");
col5.setTitle("Komentarz");
col6.setPreferredWidth(100);
col6.setProperty("comment4");
col6.setTitle("Komentarz");
col7.setPreferredWidth(100);
col7.setProperty("comment5");
col7.setTitle("Komentarz");
columns.add(col1);
columns.add(col2);
columns.add(col3);
columns.add(col4);
columns.add(col5);
columns.add(col6);
columns.add(col7);
}
@AfterClass
public static void tearDownClass() throws Exception {
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
/** * Test of build method, of class JRXMLBuilder. */
@Test
public void testBuild() {
try {
System.out.println("build");
List<JBReportElement> elements = new ArrayList<JBReportElement>();
//col header font
JBFont colHeaderFont = new JBFont();
colHeaderFont.setBold(true);
colHeaderFont.setSize(10);
colHeaderFont.setForegroundColor("#555555");
//detail font
JBFont detailFont = new JBFont();
detailFont.setSize(6);
detailFont.setForegroundColor("#000000");
detailFont.setPdfEncoding("Cp1257");
JBPage page = new JBPage();
JBReport report = new JBReport(page, colHeaderFont, detailFont, "#CCCCFF", "#DEDEDE", "#FFFFFF");
JBFont titleFont = new JBFont();
titleFont.setBold(true);
titleFont.setSize(20);
titleFont.setForegroundColor("#FF0000");
titleFont.setPdfEncoding("Cp1257");
//add title elements
elements.add(new JBStaticTextElement("Hello World!", 450, 10, 300, titleFont));
elements.add(new JBImageElement("C:\\\\Documents and Settings\\\\admin\\\\Moje dokumenty\\\\NetBeansProjects\\\\JASPER_BERRY\\\\test.jpg", 0, 0, 350, 242));
report.setTitleElements(elements);
JRXMLBuilder instance = new JRXMLBuilder(columns, report);
boolean expResult = true;
boolean result = instance.build();
JasperReport jr = JasperCompileManager.compileReport("jasperberry_by_softberries.jrxml");
//PREPARE SOME DATA
DynaProperty[] props = new DynaProperty[columns.size()];
for (int i = 0; i < columns.size(); i++) {
props[i] = new DynaProperty(columns.get(i).getProperty(), String.class);
}
BasicDynaClass dynaClass = new BasicDynaClass("tester", null, props);
List<DynaBean> beans = new ArrayList<DynaBean>();
for (int i = 0; i < 100; i++) {
DynaBean db = dynaClass.newInstance();
db.set("name", "Krzysztof " + i);
db.set("surname", "Grajek " + i);
db.set("comment", "Komentarz ");
db.set("comment2", "Komentarz ");
db.set("comment3", "Komentarz ");
db.set("comment4", "Komentarz ");
//
db.set("comment5", "Komentarz ");
beans.add(db);
}
JasperPrint jp = JasperFillManager.fillReport(jr, null, new JRBeanCollectionDataSource(beans));
JasperExportManager.exportReportToPdfFile(jp, "jasperberry.pdf");
assertEquals(expResult, result);
} catch (Exception ex) {
Logger.getLogger(JRXMLBuilderTest.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
You should find similar snippet in a test suite of the project.
The project itself is licensed under LGPL and its available from sourceforge here