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我不会浪费我和你的时间来暴露我的猜测，我的推论，我的假设......
所以，“ex abrupto”（前提：我使用流以便生产与iText的PDF文件）：
这是代码： 在行动使用iText的java.io.IOException
public String getPDF() {
PdfPratDTO dto = (PdfPratDTO) sexxion.get("pdfprdto");
String numprat = dto.getNumPrat();
String intest = dto.getIntest();
ArrayList<PratDettAvanzDTO> avzs = dto.getDetavz();
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
Document document = new Document();
try {
PdfWriter writer = PdfWriter.getInstance(document, buffer);
document.open();
StaticElements.addMetaData(document, numprat, "P");
try {
BodyElements.addTitle(writer, document, numprat, intest, "P");
}
catch (MalformedURLException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
BodyElements.addContents(document, avzs, "P");
document.close();
}
catch (DocumentException e) {
e.printStackTrace();
}
setInputStream(new ByteArrayInputStream(buffer.toByteArray()));
return SUCCESS;
}
没有问题致电
StaticElements.addMetaData(document, numprat, "P");
，甚至没有要求
BodyElements.addTitle(writer, document, numprat, intest, "P");
文档打印正确地示出这些元件，但是当我添加
BodyElements.addContents(document, avzs, "P");
即
@SuppressWarnings("unchecked")
public static void addContents(Document document, Object data, String type) throws DocumentException {
Paragraph header = new Paragraph();
StaticElements.addEmptyLine(header, 3);
if (type.equals("U"))
createTable(header, (UserDTO) data);
else if (type.equals("P"))
createTablePrat(header, (ArrayList<PratDettAvanzDTO>) data);
document.add(header);
}
private static void createTablePrat(Paragraph header, List<PratDettAvanzDTO> avzs) throws BadElementException {
float[] columnWidths = {8,33,5,10,9,9,5,7,14};
PdfPTable table = new PdfPTable(columnWidths);
PdfPCell c1 = new PdfPCell(new Phrase("Date"));
c1.setFixedHeight(21f);
c1.setBackgroundColor(new BaseColor(221, 232, 250));
c1.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(c1);
c1 = new PdfPCell(new Phrase("Description"));
table.addCell(c1);
c1 = new PdfPCell(new Phrase("St. Pr. Code"));
table.addCell(c1);
etc.etc.
c1 = new PdfPCell(new Phrase("Purpose"));
table.addCell(c1);
table.setHeaderRows(1);
System.out.println("-> createTablePrat.size()=" + avzs.size());
//TODO
header.add(table);
}
文档仍然打印，但仍像之前即没有这个新元素和，在最好的情况下（最好...只是看）控制台输出仍然挂起，在大多数情况下显示以下错误
07/06 12:35:10| ERROR [http-apr-10080-exec-9] (CommonsLogger.java:38) - Exception occurred during processing request: java.io.IOException: APR error: -730053
org.apache.catalina.connector.ClientAbortException: java.io.IOException: APR error: -730053
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:353)
at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:317)
at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:110)
at org.apache.struts2.dispatcher.StreamResult.doExecute(StreamResult.java:301)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:367)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:271)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:238)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:238)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:544)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
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:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2463)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2452)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: APR error: -730053
at org.apache.coyote.http11.InternalAprOutputBuffer.writeToSocket(InternalAprOutputBuffer.java:291)
at org.apache.coyote.http11.InternalAprOutputBuffer.writeToSocket(InternalAprOutputBuffer.java:244)
at org.apache.coyote.http11.InternalAprOutputBuffer.flushBuffer(InternalAprOutputBuffer.java:213)
at org.apache.coyote.http11.AbstractOutputBuffer.flush(AbstractOutputBuffer.java:305)
at org.apache.coyote.http11.AbstractHttp11Processor.action(AbstractHttp11Processor.java:765)
at org.apache.coyote.Response.action(Response.java:179)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:349)
... 70 more
我真的没有最简单的想法，即使是因为如果在addContent(...)方法中，我调用CreateTable()方法，它与第一个方法相同，除了列数，标题标签和检索数据的事实只需要一个dto而不是一个dtos列表，一切都很好用！
Thanx！