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Java > Open Source Codes > servlets > HtmlServlet


1 /*
2  * ============================================================================
3  * GNU Lesser General Public License
4  * ============================================================================
5  *
6  * JasperReports - Free Java report-generating library.
7  * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22  *
23  * JasperSoft Corporation
24  * 303 Second Street, Suite 450 North
25  * San Francisco, CA 94107
26  * http://www.jaspersoft.com
27  */
28 package servlets;
29
30 import java.io.File JavaDoc;
31 import java.io.IOException JavaDoc;
32 import java.io.PrintWriter JavaDoc;
33 import java.util.HashMap JavaDoc;
34 import java.util.Map JavaDoc;
35
36 import javax.servlet.ServletContext JavaDoc;
37 import javax.servlet.ServletException JavaDoc;
38 import javax.servlet.http.HttpServlet JavaDoc;
39 import javax.servlet.http.HttpServletRequest JavaDoc;
40 import javax.servlet.http.HttpServletResponse JavaDoc;
41
42 import net.sf.jasperreports.engine.JRException;
43 import net.sf.jasperreports.engine.JRExporterParameter;
44 import net.sf.jasperreports.engine.JRRuntimeException;
45 import net.sf.jasperreports.engine.JasperFillManager;
46 import net.sf.jasperreports.engine.JasperPrint;
47 import net.sf.jasperreports.engine.JasperReport;
48 import net.sf.jasperreports.engine.export.JRHtmlExporter;
49 import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
50 import net.sf.jasperreports.engine.util.JRLoader;
51 import net.sf.jasperreports.j2ee.servlets.ImageServlet;
52 import datasource.WebappDataSource;
53
54
55 /**
56  * @author Teodor Danciu (teodord@users.sourceforge.net)
57  * @version $Id: HtmlServlet.java 1236 2006-04-22 10:51:44 +0300 (Sat, 22 Apr 2006) teodord $
58  */
59 public class HtmlServlet extends HttpServlet JavaDoc
60 {
61
62
63     /**
64      *
65      */
66     public void service(
67         HttpServletRequest JavaDoc request,
68         HttpServletResponse JavaDoc response
69         ) throws IOException JavaDoc, ServletException JavaDoc
70     {
71         ServletContext JavaDoc context = this.getServletConfig().getServletContext();
72
73         response.setContentType("text/html");
74         PrintWriter JavaDoc out = response.getWriter();
75
76         try
77         {
78             File JavaDoc reportFile = new File JavaDoc(context.getRealPath("/reports/WebappReport.jasper"));
79             if (!reportFile.exists())
80                 throw new JRRuntimeException("File WebappReport.jasper not found. The report design must be compiled first.");
81
82             JasperReport jasperReport = (JasperReport)JRLoader.loadObject(reportFile.getPath());
83         
84             Map JavaDoc parameters = new HashMap JavaDoc();
85             parameters.put("ReportTitle", "Address Report");
86             parameters.put("BaseDir", reportFile.getParentFile());
87                         
88             JasperPrint jasperPrint =
89                 JasperFillManager.fillReport(
90                     jasperReport,
91                     parameters,
92                     new WebappDataSource()
93                     );
94                         
95             JRHtmlExporter exporter = new JRHtmlExporter();
96         
97             request.getSession().setAttribute(ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, jasperPrint);
98             
99             exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
100             exporter.setParameter(JRExporterParameter.OUTPUT_WRITER, out);
101             exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, "image?image=");
102             
103             exporter.exportReport();
104         }
105         catch (JRException e)
106         {
107             out.println("<html>");
108             out.println("<head>");
109             out.println("<title>JasperReports - Web Application Sample</title>");
110             out.println("<link rel=\"stylesheet\" type=\"text/css\" HREF=\"../stylesheet.css\" title=\"Style\">");
111             out.println("</head>");
112             
113             out.println("<body bgcolor=\"white\">");
114
115             out.println("<span class=\"bnew\">JasperReports encountered this error :</span>");
116             out.println("<pre>");
117
118             e.printStackTrace(out);
119
120             out.println("</pre>");
121
122             out.println("</body>");
123             out.println("</html>");
124         }
125     }
126
127
128 }
129
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