我们使用漂亮的库iText作为我客户的一个项目，从表示html页面的字符串生成pdf。 iText版本是5.5.10。
以下代码适用于在Windows上运行的开发环境和服务器，但它不适用于在iSeries上运行的客户服务器。
public class GeneratePDFCmdImpl extends ControllerCommandImpl implements
GeneratePDFCmd {
private String charsetStr = null;
private Charset charset = null;
private BaseFont bf = null;
private String destFile = null;
private String destFilename = null;
private String srcContent = null;
private String docName = null;
public void setDocName(String docname) {
this.docName = docname;
}
public void setSrcContent(String srcContent) {
this.srcContent = srcContent;
}
private void prepareDefaultsAndSettings() {
/* srcContent may be more complex html but even this simple one is not working */
srcContent = "<html><head></head><body>This is just a test</body></html>";
docName = "mypdf";
charsetStr = "UTF-8";
destFilename = docName+".pdf";
Date timestamp = new Date();
/* destFile = "/" is just for the sample. In my real project, the value is a folder where my app has full rights
*/
destFile = "/" + destFilename;
charset = Charset.forName(charsetStr);
FontFactory.register("/fonts/arial.ttf","Arial");
bf = FontFactory.getFont("Arial").getBaseFont();
}
@Override
public void performExecute() throws ECException {
super.performExecute();
Document document = null;
OutputStream os = null;
prepareDefaultsAndSettings();
try {
InputStream srcInputStream;
srcInputStream = new ByteArrayInputStream(srcContent.getBytes(charset));
document = new Document(PageSize.A4, 20, 20, 75, 80);
FileOutputStream destOutput = new FileOutputStream(destFile);
PdfWriter writer = PdfWriter.getInstance(document,destOutput);
writer.setPageEvent( new HeaderFooterPageEvent(bf));
document.open();
XMLWorkerHelper.getInstance().parseXHtml(writer, document, srcInputStream, charset);
document.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
} finally {
if(document != null) {
document.close();
}
document = null;
try {
if (os != null) {
os.close();
}
} catch(IOException e) {
e.printStackTrace();
}
os = null;
}
}
private class HeaderFooterPageEvent extends PdfPageEventHelper {
PdfContentByte cb;
PdfTemplate template;
BaseFont bf;
Font f;
float fs;
public HeaderFooterPageEvent(BaseFont _bf) {
super();
bf = _bf;
f = new Font(bf);
}
@Override
public void onOpenDocument(PdfWriter writer, Document document) {
cb = writer.getDirectContent();
template = cb.createTemplate(50, 50);
}
@Override
public void onEndPage(PdfWriter writer, Document document) {
Date dat = new Date();
ColumnText ct = new ColumnText(writer.getDirectContent());
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy HH:mm");
ct.showTextAligned(writer.getDirectContent(), Element.ALIGN_CENTER, new Phrase(sdf.format(dat) ), 100, 30, 0);
String text = "Page " +writer.getPageNumber() + " to ";
float len = bf.getWidthPoint(text, 12);
cb.beginText();
cb.setFontAndSize(bf, 12);
cb.setTextMatrix(450, 30);
cb.showText(text);
cb.endText();
cb.addTemplate(template, 450 + len, 30);
}
@Override
public void onCloseDocument(PdfWriter writer, Document document) {
template.beginText();
template.setFontAndSize(bf, 12);
template.showText(String.valueOf(writer.getPageNumber()));
template.endText();
}
}
}
在iSeries上执行时，我们收到错误消息
com.ibm.commerce.command.ECCommandTarget executeCommand CMN0420E: The following command exception has occurred during processing: "ExceptionConverter: java.io.IOException: The document has no pages.". ExceptionConverter: java.io.IOException: The document has no pages.
at com.itextpdf.text.pdf.PdfPages.writePageTree(PdfPages.java:112)
at com.itextpdf.text.pdf.PdfWriter.close(PdfWriter.java:1256)
at com.itextpdf.text.pdf.PdfDocument.close(PdfDocument.java:900)
at com.itextpdf.text.Document.close(Document.java:415)
at be.ourcustomer.package.GeneratePDFCmdImpl.performExecute(GeneratePDFCmdImpl.java:107)
我对自己做错了什么并不太了解。任何帮助将不胜感激