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Posted to users@tomcat.apache.org by Lina María Rojas Barahona <lm...@cnb.uam.es> on 2004/11/02 17:37:41 UTC
can not run a servlet that generates a pdf
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 lanzó excepción
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)
Re: can not run a servlet that generates a pdf
Posted by Jon Wingfield <jo...@mkodo.com>.
You are calling getWriter in your catch clause after you have already
called getOutputStream. That's illegal.
You could set up an error page in web.xml to report the exception
instead of catching it.
Jon
Lina María Rojas Barahona wrote:
> 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 lanzó excepción
> 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)
>
>
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