Hello:
I am trying to write a PDF using a servlet in Apache Tomcat/5.0.27 , and It doesn�t
work. I just call the servlet in an html page, I never use a response.getWriter, so I
dont undestand why I can not use response.getOutputStream in the servlet,
---- SmartJPrint_PDFServlet1---
package demo.activetree.print.webapps;
import com.activetree.print.*;
import com.activetree.utils.AtStringUtil;
import com.activetree.resource.AtImageList;
import java.io.*;
import java.awt.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.swing.table.TableModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.*;
public class SmartJPrint_PDFServlet1 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
//TODO-1: Use your own license key here
SmartJPrint.setLicenseKey("8FE6-D08A-68A5-191A");
//Set header first
response.setHeader("Cache-Control", "max-age=30");
response.setContentType("application/pdf");
//TODO-3: Use "inline" for directly opening in the browser window.
//String inline = "inline; filename=\"smartjprint_" + System.currentTimeMillis() +
".pdf\"";
//response.setHeader("Content-disposition", inline);
//TODO-2: Use "attachment" for doing a SaveAs... in the browser.
String attachment = "attachment; filename=\"smartjprint_" +
System.currentTimeMillis() + ".pdf\"";
response.setHeader("Content-disposition", attachment);
//Prepare the data.
AtBook book = new AtBook();
Color fgColor = SystemColor.black;
Color bgColor = SystemColor.white;
//Produce lines of Styled/Plain text, icons, 2D line data.
produceRandomData(book);
//Table-1.
TableModel tabularData = createSampleTabularData();
Font titleFont = new Font("Arial", Font.BOLD, 20);
book.append(new AtStringElement("\nPermanent Employees\n", titleFont,
AtPrintConstants.GENERAL_HEADER_FG1));
Font normalBoldFont = new Font("Arial", Font.BOLD, 12);
book.append(new AtStringElement("Table-1\n", normalBoldFont));
Font font = new Font("Arial", Font.PLAIN, 12);
book.append(tabularData, font, fgColor, bgColor);
//Page Break - to put things next in a new page.
book.append(new AtStringElement("\nPage Break (applied next to this line)\n",
titleFont,
AtPrintConstants.GENERAL_HEADER_FG1));
book.append(AtElement.PAGE_BREAK); //show in next page.
//Table-2.
tabularData = createSampleTabularData();
book.append(new AtStringElement("\nContract Employees\n", titleFont,
AtPrintConstants.GENERAL_HEADER_FG1));
book.append(new AtStringElement("Table-2\n", normalBoldFont));
book.append(tabularData, font, fgColor, bgColor);
//We are done with our data, now write to the client.
try {
ServletOutputStream outStream = response.getOutputStream();
AtPdfPrinter pdfPrinter = new AtPdfPrinter();
pdfPrinter.print(book, outStream);
outStream.flush();
outStream.close();
}catch(Throwable t) {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.write("Got exception when doing a AtGenericPrinter.print(book, pdfStream)
<p>");
out.write(AtStringUtil.getStackTrace(t));
out.write("</p>");
out.close();
}
}
public TableModel createSampleTabularData() {
String[] cols = {"Employee Name", "SS No.", "Date Of Birth",
"Position", "Salary"};
String[][] data = new String[5][cols.length];
//Create same data for the table.
String name = "Employee Name - ";
String ssn = "SS No - ";
String dob = "Birth Date - ";
String position = "Position - ";
String annualSalary = "Employee Salary - ";
for (int row=0; row < data.length; row++) {
data[row][0] = name + row;
data[row][1] = ssn + row;
data[row][2] = dob + row;
data[row][3] = position + row;
data[row][4] = annualSalary + row;
}
DefaultTableModel tableModel = new DefaultTableModel(data, cols);
return tableModel;
}
public void produceRandomData(AtBook book) {
Font titleFont = new Font("Arial", Font.BOLD, 20);
Color titleColor = AtPrintConstants.GENERAL_HEADER_FG1;
ImageIcon bullet = AtImageList.IMAGE_LIST.RIGHT_ARROW_16;
AtStringElement note = new AtStringElement("Note: ", new Font("Helvitica", 3,
12)); //3 == BOLD + ITALIC
book.write(note);
book.write(new AtStringElement("This PDF document is generated using Smart JPrint
(AtGenericPrinter class).\n", new Font("Helvetica", Font.ITALIC, 12)));
book.write(new AtLineElement(200, 1, AtLineElement.TOP, true));
AtStringElement elm = new AtStringElement("Generate PDF Documents using \"Smart
JPrint\"\n\n", titleFont);
elm.setForeground(titleColor);
book.write(elm);
book.write(bullet);
book.write("Smart JPrint is 100% pure Java APIs for (i) PDF generation, " +
"(ii) Automatically or Manually Printing, (iii) Multipage TIFF for FAX
sending/viewing, " +
"(iv) JPEG/PNG image creation for each output pages.\n\n");
elm = new AtStringElement("Add Plain/Styled text, icons/images, 2D graphics,
tabular data using " +
"Java's TableModel to automatically format and produce
the output.");
elm.setFont(new Font("Helvetica", Font.PLAIN, 12));
book.write(elm);
book.write("\n\n");
book.write(bullet);
elm = new AtStringElement("Produce output from Java Swing components in a matter
of " +
"minute with 2 lines of code. Smart JPrint knows how to
format " +
"the contents in order to generate the output
automatically.");
elm.setFont(new Font("Helvetica", Font.PLAIN, 12));
book.write(elm);
book.write("\n\n");
book.write(new AtStringElement("How to page break, TAB, Strike through?", titleFont,
titleColor));
book.write("\nA page break can be added using the AtPageBreak object or by " +
"using the PAGE_BREAK constant defined in the AtElement class.\n");
elm = new AtStringElement("\nThis line is an example of Strike through text.\n");
elm.setStrikeThrough(true);
elm.setStrikeThroughColor(SystemColor.darkGray);
book.append(elm);
elm = new AtStringElement("This line has a \tTAB character\n");
book.append(elm);
}
}
-----------------------------------------------------
ERROR
2004-11-02 14:54:18 StandardWrapperValve[PDFServlet1]: Servlet.service() para servlet
PDFServlet1 lanz� excepci�n
java.lang.IllegalStateException: getOutputStream() ya ha sido llamado para esta
respuesta
at org.apache.coyote.tomcat5.CoyoteResponse.getWriter(CoyoteResponse.java:599)
at
org.apache.coyote.tomcat5.CoyoteResponseFacade.getWriter(CoyoteResponseFacade.java:163)
at
demo.activetree.print.webapps.SmartJPrint_PDFServlet1.doGet(SmartJPrint_PDFServlet1.java:67)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Unknown Source)
