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| package sample.servlets;
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.Servlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.JasperRunManager;
import net.sf.jasperreports.engine.export.JRHtmlExporter;
import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
import net.sf.jasperreports.engine.util.JRLoader;
/**
* @version 1.0
* @author
*/
public class ReportServlet extends HttpServlet implements Servlet {
private DataSource ds;
/**
* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req, resp);
}
/**
* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
Connection conn = null;
Map parameters = new HashMap();
try {
// Get a database connection
conn = getConnection();
String reportType = req.getParameter("reportType");
ServletContext context = getServletContext();
String reportFileName = null;
if (reportType.equals("basicReportHTML")
|| reportType.equals("basicReportPDF")) {
reportFileName = "BasicReport";
parameters.put("state_abbr", "TX");
parameters.put(
"Title",
"State Customer Report For Company XYZ");
parameters.put(
"BaseDir",
new File(context.getRealPath("/images/")));
} else if (
reportType.equals("groupReportHTML")
|| reportType.equals("groupReportPDF")) {
reportFileName = "GroupReport";
parameters.put("Title", "Customer Report For Company XYZ");
} else if (
reportType.equals("multiReportHTML")
|| reportType.equals("multiReportPDF")) {
reportFileName = "MultiReport";
JasperReport orderHistory = getCompiledReport("OrderHistory");
JasperReport referralHistory =
getCompiledReport("ReferralHistory");
parameters.put("customer_id", new Integer(9));
parameters.put("OrderHistory", orderHistory);
parameters.put("ReferralHistory", referralHistory);
}
JasperReport jasperReport = getCompiledReport(reportFileName);
if (reportType.indexOf("HTML") >= 0) {
// Create JasperPrint object using the fillReport() method in JasperManager class
JasperPrint jasperPrint =
JasperManager.fillReport(jasperReport, parameters, conn);
generateHtmlOutput(jasperPrint, req, resp);
}
// Assume it is a PDF report
else {
generatePDFOutput(resp, parameters, jasperReport);
}
} catch (Exception e) {
req.setAttribute("exception", e);
getServletContext().getRequestDispatcher(
"/jsp/exception.jsp").forward(
req,
resp);
} finally {
if (conn != null) {
try {
conn.close();
} catch (SQLException sqle) {
// Ignore
}
}
}
}
private void generateHtmlOutput(
JasperPrint jasperPrint,
HttpServletRequest req,
HttpServletResponse resp)
throws IOException, JRException {
Map imagesMap = new HashMap();
req.getSession().setAttribute("IMAGES_MAP", imagesMap);
JRHtmlExporter exporter = new JRHtmlExporter();
exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_WRITER,resp.getWriter());
exporter.setParameter(JRHtmlExporterParameter.IMAGES_MAP, imagesMap);
exporter.setParameter(
JRHtmlExporterParameter.IMAGES_URI,"image?image=");
exporter.exportReport();
}
private void generatePDFOutput(
HttpServletResponse resp,
Map parameters,
JasperReport jasperReport)
throws JRException, NamingException, SQLException, IOException {
byte[] bytes = null;
bytes =
JasperRunManager.runReportToPdf(
jasperReport,
parameters,
getConnection());
resp.setContentType("application/pdf");
resp.setContentLength(bytes.length);
ServletOutputStream ouputStream = resp.getOutputStream();
ouputStream.write(bytes, 0, bytes.length);
ouputStream.flush();
ouputStream.close();
}
/**
* @see javax.servlet.GenericServlet#void ()
*/
public void init() throws ServletException {
super.init();
ServletContext context = getServletContext();
// Set class path for compiling XML templates
System.setProperty(
"jasper.reports.compile.class.path",
context.getRealPath("/WEB-INF/lib/jasperreports-0.6.1.jar")
+ System.getProperty("path.separator")
+ context.getRealPath("/WEB-INF/classes/"));
// Specify a default folder for storing
// compiled XML templates
System.setProperty(
"jasper.reports.compile.temp",
context.getRealPath("/reports/"));
}
/*private DataSource getDataSource() throws NamingException {
if (ds == null) {
Context ctx = new InitialContext();
ds = (DataSource) ctx.lookup("jdbc/reportDB");
}
return ds;
}*/
private Connection getConnection() throws SQLException, NamingException {
connexion conx=new connexion();
conx.initialize();
return conx.conn ;
}
private JasperReport getCompiledReport(String fileName)
throws JRException {
File reportFile =
new File(
getServletContext().getRealPath(
"/reports/" + fileName + ".jasper"));
// If compiled file is not found, then
// compile XML template
if (!reportFile.exists()) {
JasperCompileManager.compileReportToFile(
getServletContext().getRealPath(
"/reports/" + fileName + ".xml"));
}
JasperReport jasperReport =
(JasperReport) JRLoader.loadObject(reportFile.getPath());
return jasperReport;
}
} |
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