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Java > Open Source Codes > servlets > JasperPrintServlet


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.ObjectOutputStream JavaDoc;
33 import java.io.PrintWriter JavaDoc;
34 import java.util.HashMap JavaDoc;
35 import java.util.Map JavaDoc;
36
37 import javax.servlet.ServletContext JavaDoc;
38 import javax.servlet.ServletException JavaDoc;
39 import javax.servlet.ServletOutputStream JavaDoc;
40 import javax.servlet.http.HttpServlet JavaDoc;
41 import javax.servlet.http.HttpServletRequest JavaDoc;
42 import javax.servlet.http.HttpServletResponse JavaDoc;
43
44 import net.sf.jasperreports.engine.JRException;
45 import net.sf.jasperreports.engine.JRRuntimeException;
46 import net.sf.jasperreports.engine.JasperFillManager;
47 import net.sf.jasperreports.engine.JasperPrint;
48 import net.sf.jasperreports.engine.JasperReport;
49 import net.sf.jasperreports.engine.util.JRLoader;
50 import datasource.WebappDataSource;
51
52
53 /**
54  * @author Teodor Danciu (teodord@users.sourceforge.net)
55  * @version $Id: JasperPrintServlet.java 1236 2006-04-22 10:51:44 +0300 (Sat, 22 Apr 2006) teodord $
56  */
57 public class JasperPrintServlet extends HttpServlet JavaDoc
58 {
59
60
61     /**
62      *
63      */
64     public void service(
65         HttpServletRequest JavaDoc request,
66         HttpServletResponse JavaDoc response
67         ) throws IOException JavaDoc, ServletException JavaDoc
68     {
69         ServletContext JavaDoc context = this.getServletConfig().getServletContext();
70
71         File JavaDoc reportFile = new File JavaDoc(context.getRealPath("/reports/WebappReport.jasper"));
72         if (!reportFile.exists())
73             throw new JRRuntimeException("File WebappReport.jasper not found. The report design must be compiled first.");
74
75         Map JavaDoc parameters = new HashMap JavaDoc();
76         parameters.put("ReportTitle", "Address Report");
77         parameters.put("BaseDir", reportFile.getParentFile());
78                     
79         JasperPrint jasperPrint = null;
80
81         try
82         {
83             JasperReport jasperReport = (JasperReport)JRLoader.loadObject(reportFile.getPath());
84             
85             jasperPrint =
86                 JasperFillManager.fillReport(
87                     jasperReport,
88                     parameters,
89                     new WebappDataSource()
90                     );
91         }
92         catch (JRException e)
93         {
94             response.setContentType("text/html");
95             PrintWriter JavaDoc out = response.getWriter();
96             out.println("<html>");
97             out.println("<head>");
98             out.println("<title>JasperReports - Web Application Sample</title>");
99             out.println("<link rel=\"stylesheet\" type=\"text/css\" HREF=\"../stylesheet.css\" title=\"Style\">");
100             out.println("</head>");
101             
102             out.println("<body bgcolor=\"white\">");
103
104             out.println("<span class=\"bnew\">JasperReports encountered this error :</span>");
105             out.println("<pre>");
106
107             e.printStackTrace(out);
108
109             out.println("</pre>");
110
111             out.println("</body>");
112             out.println("</html>");
113
114             return;
115         }
116
117         if (jasperPrint != null)
118         {
119             response.setContentType("application/octet-stream");
120             ServletOutputStream JavaDoc ouputStream = response.getOutputStream();
121             
122             ObjectOutputStream JavaDoc oos = new ObjectOutputStream JavaDoc(ouputStream);
123             oos.writeObject(jasperPrint);
124             oos.flush();
125             oos.close();
126
127             ouputStream.flush();
128             ouputStream.close();
129         }
130         else
131         {
132             response.setContentType("text/html");
133             PrintWriter JavaDoc out = response.getWriter();
134             out.println("<html>");
135             out.println("<head>");
136             out.println("<title>JasperReports - Web Application Sample</title>");
137             out.println("<link rel=\"stylesheet\" type=\"text/css\" HREF=\"../stylesheet.css\" title=\"Style\">");
138             out.println("</head>");
139             
140             out.println("<body bgcolor=\"white\">");
141     
142             out.println("<span class=\"bold\">Empty response.</span>");
143     
144             out.println("</body>");
145             out.println("</html>");
146         }
147     }
148
149
150 }
151
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