Added new servlet for export table data into excel file

git-svn-id: http://15.206.35.175/svn/proteus/business-java/trunk@97222 ce508802-f39f-4f6c-b175-0d175dae99d5

webitm-dashboard/ibase/server/TableToExcelServlet.java

+package ibase.server;
+
+import java.io.ByteArrayOutputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+import org.apache.commons.io.IOUtils;
+
+/**
+ * Servlet which do the magic conversion.<br>
+ * Dont forget to declare it in your web.xml<br>
+ * < servlet><br>
+ * < servlet-name>gwtTableToExcelServlet< /servlet-name><br>
+ * < servlet-class>com.googlecode.gwtTableToExcel.server.TableToExcelServlet<
+ * /servlet-class><br>
+ * </ servlet><br>
+ * < servlet-mapping><br>
+ * < servlet-name>gwtTableToExcelServlet< /servlet-name><br>
+ * < url-pattern>/gtte/excel< /url-pattern><br>
+ * < /servlet-mapping><br>
+ * 
+ * @author Francois Wauquier 'wokier'
+ */
+@SuppressWarnings("serial")
+public class TableToExcelServlet extends HttpServlet
+{
+
+	private String encoding = "ISO-8859-1";
+
+	/**
+	 * Constructor
+	 */
+	public TableToExcelServlet()
+	{
+		super();
+	}
+
+	/**
+	 * @see HttpServlet#init()
+	 */
+	@Override
+	public void init() throws ServletException
+	{
+		super.init();
+	}
+
+	/**
+	 * see HttpServlet#init(ServletConfig)
+	 */
+	@Override
+	public void init(ServletConfig config) throws ServletException
+	{
+		super.init(config);
+		String initParameterEncoding = config.getInitParameter("encoding");
+		if (initParameterEncoding != null)
+		{
+			setEncoding(initParameterEncoding);
+		}
+	}
+
+	@Override
+	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
+	{
+		export(request, response);
+	}
+
+	@Override
+	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
+	{
+		export(request, response);
+	}
+
+	private void export(HttpServletRequest request, HttpServletResponse response)
+	{
+		try
+		{
+			HttpSession session = request.getSession(false);
+			System.out.println("before session");
+			String reportName = (String)session.getAttribute("reportName");
+			System.out.println("After session");
+			String html = request.getParameter("html");
+			String fileName = request.getParameter("fileName");
+			String export = request.getParameter("export");
+			System.out.print(" fileName  is=" + fileName + "  export type is =" + export);
+			System.out.println("html Data for PDF is ="+html);
+			
+			System.out.println("reportName---->"+reportName);
+			response.reset();
+			if(reportName == null)
+			{
+				fileName ="Dashboard";
+			}else{
+				fileName = reportName;
+			}
+
+			System.out.print(" fileName  is=" + fileName + "  export type is =" + export);
+			if ("Excel".equals(export))
+			{
+				if (!fileName.endsWith(".xls"))
+				{
+					fileName = fileName + ".xls";
+				}
+				response.setContentType("application/vnd.ms-excel");
+				response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
+				response.getWriter().write(html);
+			}
+			else if ("PDF".equals(export))
+			{
+
+				if (!fileName.endsWith(".pdf"))
+				{
+					fileName = fileName + ".pdf";
+				}
+				//processRequest(request,response,html);
+				createPdfUsingItext(request, response, html);
+			}
+			
+		} catch (IOException e)
+		{
+			System.out.println("TableToExcelServlet : export()=" + e);
+			e.printStackTrace();
+		}
+	}
+
+	
+	public void createPdfUsingItext(HttpServletRequest request, HttpServletResponse response, String exampleString)
+	{
+		System.out.println(" In createPdfUsingItext ");
+		/*try
+		{
+			response.setContentType("application/pdf");
+			response.setHeader("Content-disposition", "attach; filename=test.pdf");
+
+			ByteArrayOutputStream baos = new ByteArrayOutputStream();
+			Document document = new Document();
+			PdfWriter.getInstance(document, baos);
+			System.out.println(" After setting header ");
+
+			OutputStream out = response.getOutputStream();
+			//PdfWriter.getInstance(document, out);
+			document.open();
+			document.add(new Paragraph("Tutorial to Generate PDF using Servlet"));
+			document.add(new Paragraph("PDF Created Using Servlet, iText Example Works"));
+			document.close();
+
+			response.setContentLength(baos.size());
+			// write ByteArrayOutputStream to the ServletOutputStream
+			OutputStream os = response.getOutputStream();
+			baos.writeTo(os);
+			os.flush();
+			os.close();
+			System.out.println(" After pdf generation ");
+		}
+		
+		  catch (DocumentException e) { // TODO Auto-generated catch block //
+		 e.printStackTrace(); }
+		 
+		catch (IOException e)
+		{
+			// TODO Auto-generated catch block
+			//  e.printStackTrace();
+		} */
+	}
+	
+	public void setEncoding(String encoding)
+	{
+		this.encoding = encoding;
+	}
+}