How to export data from a Dynpro table to Excel file?

Question

Hi
Here I go again. I read the post <b>Looking for example to export data from a DynPro table to Excel file</b> and put the code lines into a Web Dynpro Project where we need to export a dynpro table to Excel file but exactly at line 23 it doesn't recognize <b>workBook = new HSSFWorkbook();</b>
1     //Declare this in the end between the Begin others block.
2     
3     private FileOutputStream out = null;
4     private HSSFWorkbook workBook = null;
5     private HSSFSheet hsSheet = null;
6     private HSSFRow row = null;
7     private HSSFCell cell = null;
8     private HSSFCellStyle cs = null;
9     private HSSFCellStyle cs1 = null;
10     private HSSFCellStyle cs2 = null;
11     private HSSFDataFormat dataFormat = null;
12     private HSSFFont f = null;
13     private HSSFFont f1 = null;
14     
15     //Code to create the Excel.
16     
17     public void onActionExportToExcel(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
18     {
19     //@@begin onActionExportToExcel(ServerEvent)
20     try
21     {
22     out = new FileOutputStream("C:/mydirectory/myfiles/testexcel.xls");
23     workBook = new HSSFWorkbook();
24     hsSheet = workBook.createSheet("My Sheet");
25     cs = workBook.createCellStyle();
26     cs1 = workBook.createCellStyle();
27     cs2 = workBook.createCellStyle();
28     dataFormat = workBook.createDataFormat();
29     f = workBook.createFont();
30     f1 = workBook.createFont();
31     f.setFontHeightInPoints((short) 12);
32     // make it blue
33     f.setColor( (short)HSSFFont.COLOR_NORMAL );
34     // make it bold
35     // arial is the default font
36     f.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
37     
38     // set font 2 to 10 point type
39     f1.setFontHeightInPoints((short) 10);
40     // make it red
41     f1.setColor( (short)HSSFFont.COLOR_RED );
42     // make it bold
43     f1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
44     f1.setStrikeout(true);
45     cs.setFont(f);
46     cs.setDataFormat(dataFormat.getFormat("#,##0.0"));
47     
48     // set a thick border
49     cs2.setBorderBottom(cs2.BORDER_THICK);
50     
51     // fill w fg fill color
52     cs2.setFillPattern((short) HSSFCellStyle.SOLID_FOREGROUND);
53     cs2.setFillBackgroundColor((short)HSSFCellStyle.SOLID_FOREGROUND);
54     // set the cell format to text see HSSFDataFormat for a full list
55     cs2.setDataFormat(HSSFDataFormat.getBuiltinFormat("text"));
56     cs2.setFont(f1);
57     cs2.setLocked(true);
58     cs2.setWrapText(true);
59     row = hsSheet.createRow(0);
60     hsSheet.createFreezePane(0,1,1,1);
61     for(int i=1; i<10;i++)
62     {
63     cell = row.createCell((short)i);
64     cell.setCellValue("Excel Column "+i);
65     cell.setCellStyle(cs2);
66     }
67     workBook.write(out);
68     out.close();
69     
70     //Read the file that was created.
71     
72     FileInputStream fin = new FileInputStream("C:/mydirectory/myfiles/testexcel.xls");
73     byte b[] = new byte[fin.available()];
74     fin.read(b,0,b.length);
75     fin.close();
76     
77     wdContext.currentContextElement().setDataContent(b);
78     }
79     catch(Exception e)
80     {
81     wdComponentAPI.getComponent().getMessageManager().reportException("Exception while reading file "+e,true);
82     }
83     //@@end
84     }
I don't know why this happen? Any information I will appreciate it.
Thanks in advance!!!
Tokio Franco Chang

Answer 1

After test the code lines appears this error stacktrace:
[code]
java.lang.NoClassDefFoundError: org/apache/poi/hssf/usermodel/HSSFWorkbook
     at com.sap.tc.webdynpro.progmodel.api.iwdcustomevent.ExportToExcel.onActionAct1(ExportToExcel.java:232)
     at com.sap.tc.webdynpro.progmodel.api.iwdcustomevent.wdp.InternalExportToExcel.wdInvokeEventHandler(InternalExportToExcel.java:147)
     at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:87)
     at com.sap.tc.webdynpro.progmodel.controller.Action.fire(Action.java:67)
     at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleAction(WebDynproMainTask.java:101)
     at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleActionEvent(WebDynproMainTask.java:304)
     at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:649)
     at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59)
     at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:252)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:55)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:392)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:345)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:323)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:865)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:240)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)
     at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:71)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:95)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:159)
Thanks in advance!!!
Tokio Franco Chang
[/code]