我正在尝试使用Birt下载pdf生成。 此时，存档将下载到我的桌面上（保存在本地，不要通过浏览器），但是出现错误并且不能很好地完成。
此外，我希望通过浏览器下载并且不要保存在桌面上。 将来的PDF将使用用户填写的Web参数形成。
我用：
这是我的代码：
package org.openxava.datos.actions;
import org.openxava.actions.TabBaseAction;
import java.io.*;
import java.net.URL;
import java.util.*;
import java.util.logging.Level;
import org.eclipse.birt.core.framework.Platform;
import org.eclipse.birt.report.engine.api.EXCELRenderOption;
import org.eclipse.birt.report.engine.api.EngineConfig;
import org.eclipse.birt.report.engine.api.EngineConstants;
import org.eclipse.birt.report.engine.api.EngineException;
import org.eclipse.birt.report.engine.api.HTMLRenderOption;
import org.eclipse.birt.report.engine.api.IReportEngine;
import org.eclipse.birt.report.engine.api.IReportEngineFactory;
import org.eclipse.birt.report.engine.api.IReportRunnable;
import org.eclipse.birt.report.engine.api.IRunAndRenderTask;
import org.eclipse.birt.report.engine.api.PDFRenderOption;
import org.eclipse.birt.report.engine.api.impl.*;
public class Imprimir extends TabBaseAction {
@Override
public void execute() throws EngineException {
IRunAndRenderTask task=null;
IReportEngine engine=null;
EngineConfig config = null;
try{
//System.setProperty("java.io.tmpdir", "c:/temp/test/testsampledb");
config = new EngineConfig( );
config.setLogConfig("c:/dwn", Level.INFO);
config.getAppContext().put(EngineConstants.APPCONTEXT_CLASSLOADER_KEY, this.getClass().getClassLoader());
config.getAppContext().put(EngineConstants.WEBAPP_CLASSPATH_KEY, "C:\\Birt\\birt-runtime-4_6_0\\eventjar.jar");
config.setBIRTHome("C:\\Birt\\birt-runtime-4_6_0\\ReportEngine");
//URL url = Imprimir.class.getResource("fonts/arial.ttf");
//config.setFontConfig(url);
//config.setLogConfig(null, Level.FINEST);
Platform.startup( config );
IReportEngineFactory factory = (IReportEngineFactory) Platform
.createFactoryObject( IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY );
engine = factory.createReportEngine( config );
IReportRunnable design = null;
//Open the report design
design = engine.openReportDesign("Info.rptdesign");
task = engine.createRunAndRenderTask(design);
//task.setParameterValue("Top Count", (new Integer(5)));
task.validateParameters();
//HTMLRenderOption options = new HTMLRenderOption();
//options.setImageDirectory("./");
//options.setOutputFileName("C:/Users/ADMIN/Desktop/topn.html");
//options.setEmbeddable( false );
//options.setOutputFormat("html");
PDFRenderOption options = new PDFRenderOption();
options.setOutputFileName("c:/report/topn.pdf");
options.setSupportedImageFormats("PNG;GIF;JPG;BMP;SWF;SVG");
options.setOutputFormat("pdf");
//EXCELRenderOption options = new EXCELRenderOption();
//options.setOutputFormat("xls");
//options.setOutputFileName("output/resample/customers.xls");
//options.setWrappingText(true);
task.setRenderOption(options);
task.setLocale(new Locale("en", "US"));
task.run();
task.close();
engine.destroy();
}catch( Exception ex){
ex.printStackTrace();
}
finally
{
if ( !task.getErrors( ).isEmpty( ) )
{
for ( Object e : task.getErrors( ) )
{
( (Exception) e ).printStackTrace( );
}
}
Platform.shutdown( );
System.out.println("Finished");
}
}
}
此处错误跟踪：
org.eclipse.birt.report.engine.api.EngineException: Error happened while running the report.
at org.eclipse.birt.report.engine.api.impl.EngineTask.handleFatalExceptions(EngineTask.java:2375)
at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doRun(RunAndRenderTask.java:191)
at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run(RunAndRenderTask.java:77)
at org.openxava.datos.actions.Imprimir.execute(Imprimir.java)
at org.openxava.controller.ModuleManager.executeAction(ModuleManager.java:535)
at org.openxava.controller.ModuleManager.executeAction(ModuleManager.java:443)
at org.openxava.controller.ModuleManager.execute(ModuleManager.java:404)
at org.apache.jsp.xava.execute_jsp._jspService(execute_jsp.java:256)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:720)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:584)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:523)
at org.openxava.web.servlets.Servlets.getURIAsStream(Servlets.java:72)
at org.openxava.web.dwr.Module.getURIAsStream(Module.java:214)
at org.openxava.web.dwr.Module.request(Module.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.directwebremoting.impl.ExecuteAjaxFilter.doFilter(ExecuteAjaxFilter.java:34)
at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:428)
at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:431)
at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:283)
at org.directwebremoting.servlet.PlainCallHandler.handle(PlainCallHandler.java:52)
at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:101)
at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:146)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at org.eclipse.birt.report.engine.layout.pdf.font.FontHandler.getMappedFont(FontHandler.java:213)
at org.eclipse.birt.report.engine.layout.pdf.font.FontHandler.selectFont(FontHandler.java:172)
at org.eclipse.birt.report.engine.layout.pdf.font.FontSplitter.buildChunk(FontSplitter.java:98)
at org.eclipse.birt.report.engine.layout.pdf.font.FontSplitter.getNext(FontSplitter.java:189)
at org.eclipse.birt.report.engine.layout.pdf.text.ChunkGenerator.getNext(ChunkGenerator.java:104)
at org.eclipse.birt.report.engine.nLayout.area.impl.TextCompositor.getNextTextArea(TextCompositor.java:189)
at org.eclipse.birt.report.engine.nLayout.area.impl.TextCompositor.getNextArea(TextCompositor.java:127)
at org.eclipse.birt.report.engine.nLayout.area.impl.TextAreaLayout.layoutChildren(TextAreaLayout.java:182)
at org.eclipse.birt.report.engine.nLayout.area.impl.TextAreaLayout.layout(TextAreaLayout.java:173)
at org.eclipse.birt.report.engine.nLayout.area.impl.InlineTextArea.layout(InlineTextArea.java:70)
at org.eclipse.birt.report.engine.nLayout.LayoutEngine.startContent(LayoutEngine.java:562)
at org.eclipse.birt.report.engine.emitter.ContentEmitterAdapter.startText(ContentEmitterAdapter.java:147)
at org.eclipse.birt.report.engine.emitter.ContentEmitterAdapter.startLabel(ContentEmitterAdapter.java:153)
at org.eclipse.birt.report.engine.emitter.ContentEmitterUtil.startContent(ContentEmitterUtil.java:65)
at org.eclipse.birt.report.engine.nLayout.LayoutEngine.visitContent(LayoutEngine.java:713)
at org.eclipse.birt.report.engine.nLayout.LayoutEngine.visitContent(LayoutEngine.java:721)
at org.eclipse.birt.report.engine.nLayout.LayoutEngine.startForeign(LayoutEngine.java:764)
at org.eclipse.birt.report.engine.emitter.ContentEmitterUtil.startContent(ContentEmitterUtil.java:77)
at org.eclipse.birt.report.engine.nLayout.LayoutEngine.visitContent(LayoutEngine.java:713)
at org.eclipse.birt.report.engine.nLayout.LayoutEngine.visitChildren(LayoutEngine.java:737)
at org.eclipse.birt.report.engine.nLayout.RegionLayoutEngine.layout(RegionLayoutEngine.java:31)
at org.eclipse.birt.report.engine.nLayout.area.impl.PageArea.layoutFooter(PageArea.java:489)
at org.eclipse.birt.report.engine.nLayout.area.impl.PageArea.initialize(PageArea.java:249)
at org.eclipse.birt.report.engine.nLayout.area.impl.RootArea.createNewPage(RootArea.java:147)
at org.eclipse.birt.report.engine.nLayout.area.impl.RootArea.initialize(RootArea.java:138)
at org.eclipse.birt.report.engine.nLayout.LayoutEngine.setContainer(LayoutEngine.java:366)
at org.eclipse.birt.report.engine.nLayout.LayoutEngine._startContainer(LayoutEngine.java:454)
感谢您的帮助。 我回答任何问题
祝你有个美好的一天，谢谢你。