如何使用pdf生成代码导出日食项目（itext）

Question

I came across this question on SO.
Java application runs properly in Eclipse, but not as .jar
I don't have any images in my code.I created a runnable jar file in the following way,

• Right click on project,
• Click Export,
• select "Runnable JAR File",
• Extract required libraries into generated JAR

When I run the .jar file on my desktop, the PDF file is being created. But it shows the following error

Adobe Reader could not open 'Result-itext.pdf' because it is either not a supported file type or because the file has been damaged

My Code:

try {
            PdfWriter w = new PdfWriter("Result-itext.pdf");
            PdfDocument d = new PdfDocument(w);
            Document doc = new Document(d); 
           /** Added **/
            Image img = new Image(ImageDataFactory.create(logo));           
            img.setHorizontalAlignment(HorizontalAlignment.CENTER);
            doc.add(img);                           
          /** Added **/
            doc.add(new Paragraph("Test Name : Hello World").setTextAlignment(TextAlignment.CENTER));
            doc.add(new Paragraph("Maximum Marks : 20").setTextAlignment(TextAlignment.CENTER));
            doc.add(new Paragraph("RESULTS").setBold().setTextAlignment(TextAlignment.CENTER));
            PdfFont font = PdfFontFactory.createFont(FontConstants.HELVETICA_OBLIQUE);

            Table t = new Table(3);
            t.setWidthPercent(70);
            t.setHorizontalAlignment(HorizontalAlignment.CENTER);
            t.setFont(font);
            Cell cell = new Cell().add("User-ID").setTextAlignment(TextAlignment.CENTER).setFont(font);
            t.addCell(cell);
            cell = new Cell().add("User-Name").setTextAlignment(TextAlignment.CENTER).setFont(font);
            t.addCell(cell);
            cell = new Cell().add("Marks").setTextAlignment(TextAlignment.CENTER).setFont(font);
            t.addCell(cell);

            PdfFont font1 = PdfFontFactory.createFont(FontConstants.TIMES_ROMAN);           
            t.setFont(font1);
            ArrayList<String> a = new ArrayList<String>();
            for(int i=0;i<3;i++){
                a.add(String.valueOf(i));a.add("jack");a.add(String.valueOf(i+10));
            }

            for(int i=0;i<9;i++){
                cell = new Cell().add(a.get(i)).setTextAlignment(TextAlignment.CENTER);
                t.addCell(cell);
            }
            doc.add(t);
            doc.close();
            JOptionPane.showMessageDialog(null, "Created file");
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

Answer 1

Couple pointers to help with your problem

1. Compare the two PDF file size, first one generated from eclipse, second generated from the jar file. Is there a size difference, if there is then it means that the generated jar is missing something that the eclipse project has.
2. Are you running the generated jar by double-clicking it? If 'yes' then even if there is any error thrown by any program in jar file, it won't appear as the window closes immediately (assuming that this is no Swing/AWT GUI application). So I suggest to run it from command prompt like: java -jar xyz.jar

Hopefully these two should resolve your issue.