Working with Other Datasources - JasperReports for Java Developers

Java Reference

In-Depth Information

package net.ensode.jasperbook;

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.util.HashMap;

import javax.servlet.ServletException;

import javax.servlet.ServletOutputStream;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import net.sf.jasperreports.engine.JREmptyDataSource;

import net.sf.jasperreports.engine.JRException;

import net.sf.jasperreports.engine.JasperRunManager;

public class ParameterReportServlet extends HttpServlet

{

protected void doGet(HttpServletRequest request,HttpServletResponse

response) throws ServletException, IOException

{

ServletOutputStream servletOutputStream =

response.getOutputStream();

InputStream reportStream = getServletConfig().getServletContext()

.getResourceAsStream("/reports/ParameterReport.jasper");

HashMap parameterMap = new HashMap();

parameterMap.put("paramName", "paramValue");

try

{

JasperRunManager.runReportToPdfStream(reportStream,

servletOutputStream, parameterMap, new JREmptyDataSource());

response.setContentType("application/pdf");

servletOutputStream.flush();

servletOutputStream.close();

}

catch (JRException e)

{

// display stack trace in the browser

StringWriter stringWriter = new StringWriter();

PrintWriter printWriter = new PrintWriter(stringWriter);

e.printStackTrace(printWriter);

response.setContentType("text/plain");

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