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1
28 package net.sf.jasperreports.j2ee.servlets;
29
30 import java.io.ByteArrayOutputStream  ;
31 import java.io.IOException ;
32 import java.io.OutputStream ;
33 import java.util.List ;
34
35 import javax.servlet.ServletException ;
36 import javax.servlet.ServletOutputStream ;
37 import javax.servlet.http.HttpServletRequest ;
38 import javax.servlet.http.HttpServletResponse ;
39
40 import net.sf.jasperreports.engine.JRException;
41 import net.sf.jasperreports.engine.JRExporterParameter;
42 import net.sf.jasperreports.engine.export.JRXlsAbstractExporter;
43 import net.sf.jasperreports.engine.export.JRXlsAbstractExporterParameter;
44
45
49 public abstract class AbstractXlsServlet extends BaseHttpServlet
50 {
51
52
53
56 public void service(
57 HttpServletRequest request,
58 HttpServletResponse response
59 ) throws IOException , ServletException
60 {
61 List jasperPrintList = BaseHttpServlet.getJasperPrintList(request);
62
63 if (jasperPrintList == null)
64 {
65 throw new ServletException ("No JasperPrint documents found on the HTTP session.");
66 }
67
68 Boolean isBuffered = Boolean.valueOf(request.getParameter(BaseHttpServlet.BUFFERED_OUTPUT_REQUEST_PARAMETER));
69 if (isBuffered.booleanValue())
70 {
71 JRXlsAbstractExporter exporter = getXlsExporter();
72 exporter.setParameter(JRExporterParameter.JASPER_PRINT_LIST, jasperPrintList);
73
74 ByteArrayOutputStream baos = new ByteArrayOutputStream ();
75 exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);
76
77 exporter.setParameter(JRXlsAbstractExporterParameter.IS_ONE_PAGE_PER_SHEET, Boolean.FALSE);
78 exporter.setParameter(JRXlsAbstractExporterParameter.IS_WHITE_PAGE_BACKGROUND, Boolean.FALSE);
79
80 try
81 {
82 exporter.exportReport();
83 }
84 catch (JRException e)
85 {
86 throw new ServletException (e);
87 }
88
89 byte[] bytes = baos.toByteArray();
90
91 if (bytes != null && bytes.length > 0)
92 {
93 response.setContentType("application/xls");
94 response.setHeader("Content-Disposition", "inline; filename=\"file.xls\"");
95 response.setContentLength(bytes.length);
96 ServletOutputStream ouputStream = response.getOutputStream();
97
98 try
99 {
100 ouputStream.write(bytes, 0, bytes.length);
101 ouputStream.flush();
102 }
103 finally
104 {
105 if (ouputStream != null)
106 {
107 try
108 {
109 ouputStream.close();
110 }
111 catch (IOException ex)
112 {
113 }
114 }
115 }
116 }
117 }
128 else
129 {
130 response.setContentType("application/xls");
131 response.setHeader("Content-Disposition", "inline; filename=\"file.xls\"");
132
133 JRXlsAbstractExporter exporter = getXlsExporter();
134 exporter.setParameter(JRExporterParameter.JASPER_PRINT_LIST, jasperPrintList);
135
136 OutputStream ouputStream = response.getOutputStream();
137 exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, ouputStream);
138
139 exporter.setParameter(JRXlsAbstractExporterParameter.IS_ONE_PAGE_PER_SHEET, Boolean.FALSE);
140 exporter.setParameter(JRXlsAbstractExporterParameter.IS_WHITE_PAGE_BACKGROUND, Boolean.FALSE);
141
142 try
143 {
144 exporter.exportReport();
145 }
146 catch (JRException e)
147 {
148 throw new ServletException (e);
149 }
150 finally
151 {
152 if (ouputStream != null)
153 {
154 try
155 {
156 ouputStream.close();
157 }
158 catch (IOException ex)
159 {
160 }
161 }
162 }
163 }
164 }
165
166
167
170 protected abstract JRXlsAbstractExporter getXlsExporter();
171
172
173 }
174 |
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