In your web.xml declare ImageServlet (from JasperReports) to allow images in the report to be shown properly.
<servlet> <servlet-name>image</servlet-name> <servlet-class>net.sf.jasperreports.j2ee.servlets.ImageServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>image</servlet-name> <url-pattern>/reports/image/*</url-pattern> </servlet-mapping>
Later in a Servlet or so use the DJServletHelper class which handles the most common scenario for HTML exporting in a HTTP web server. DJServletHelper will directly write the HTML in the response.
DJServletHelper.exportToHtml(request, response, imageServletUrl, dr, layoutManager, ds, parameters, exporterParams);
Where:
- request, response: HTTP Servlet request and response
- imageServletUrl: is the URI that points to the ImageServlet (declared above).
- dr: the DynamicReport
- ds: a data source (JRDataSource)
- parameters: a Map with the report parameters.
- exporterParams: a Map with the HTML exporter specific parameters.
Example
In a simple Servlet or Action from your favorite MVC framework do something like this (this is a simple servlet)
private void generateReport(HttpServletRequest request, HttpServletResponse response) throws ColumnBuilderException,
ClassNotFoundException, JRException, IOException {
String realPath = request.getSession().getServletContext().getRealPath("/");
DynamicReport dr = createDynamicReport(realPath);
String imageServletUrl = "reports/image";
LayoutManager layoutManager = new ClassicLayoutManager();
JRDataSource ds = new JRBeanCollectionDataSource(getDummyCollectionSorted(dr.getColumns()));
Map parameters = new HashMap();
Map exporterParams = new HashMap();
DJServletHelper.exportToHtml(request, response, imageServletUrl, dr, layoutManager, ds, parameters, exporterParams);
}
private DynamicReport createDynamicReport(String realPath)
throws ColumnBuilderException, ClassNotFoundException {
FastReportBuilder drb = new FastReportBuilder();
drb.addColumn("State", "state", String.class.getName(),30)
.addColumn("Branch", "branch", String.class.getName(),30)
.addColumn("Product Line", "productLine", String.class.getName(),50)
.addColumn("Item", "item", String.class.getName(),50)
.addColumn("Item Code", "id", Long.class.getName(),30,true)
.addColumn("Quantity", "quantity", Long.class.getName(),60,true)
.addColumn("Amount", "amount", Float.class.getName(),70,true)
.addGroups(2)
.addFirstPageImageBanner(realPath + "/images/logo_fdv_solutions_60.jpg", new Integer(197), new Integer(60), ImageBanner.ALIGN_LEFT)
.setTitle("November 2008 sales report")
.setSubtitle("This report was generated at " + new Date())
.setPrintBackgroundOnOddRows(true)
.setIgnorePagination(true)
.setUseFullPageWidth(true);
DynamicReport dr = drb.build();
return dr;
}
public Collection getDummyCollectionSorted(List columnlist) {
Collection dummyCollection = TestRepositoryProducts.getDummyCollection();
return SortUtils.sortCollection(dummyCollection,columnlist);
}
See also tricks when exporting to HTML