Hello all,
I'm new in ireport and try to make my first report to display piechart using servlet.
I'm using netbeans 6.1 and ireport 3.7.0. I can display a simple tabular report but can't a piechart as pdf output.
There is not any warnings or errors to catch my implementation problems. Pls. help me with this....
| Code: |
EmployeeServlet.java:
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
EmployeeReport employeeReport = new EmployeeReport();
try {
String servletPath = getServletContext().getRealPath("/");
String reportSource =servletPath + "template/employee.jrxml";
String reportDestPDF =servletPath + "reports/EmployeeReport.pdf";
params.put("reportTitle", "Hello Report World");
params.put("author", "Umme Habiba");
params.put("startDate", (new java.util.Date()).toString());
params.put("employeeChart", employeeReport.createEmployeeChartImage());
jasperDesign = JRXmlLoader.load(reportSource);
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
Connection conn;
conn = dbConnection.getConnection();
JasperPrint jasperPrint =JasperFillManager.fillReport(jasperReport, params, conn);
JasperExportManager.exportReportToPdfFile(jasperPrint, reportDestPDF);
ServletOutputStream servletOutputStream = response.getOutputStream();
JasperExportManager.exportReportToPdfStream(jasperPrint, servletOutputStream);
JasperViewer.viewReport(jasperPrint);
response.setContentType("application/pdf");
servletOutputStream.flush();
servletOutputStream.close();
} catch (JRException ex) {
Logger.getLogger(EmployeeSevlet.class.getName()).log(Level.SEVERE, null, ex);
}
}
------------------------------
createEmployeeChartImage():
------------------------------
public java.awt.Image createEmployeeChartImage(){
java.util.Hashtable employeeData = getEmployeeData();
DefaultPieDataset data = new DefaultPieDataset();
for(java.util.Enumeration e = employeeData.keys(); e.hasMoreElements();){
String employeeName = (String)e.nextElement();
System.out.println("dataset key element... " + employeeName);
data.setValue(employeeName, (Double)employeeData.get(employeeName));
}
JFreeChart chart = ChartFactory.createPieChart("Employee Chart", data, true, true, true);
return chart.createBufferedImage(500, 220);
}</td></tr></tbody></table> |
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