6

我正在尝试使用 iText 将图像添加到 PDF 文件。文件从 .TXT 转换为 PDF 并且应该添加图像：

//Convert Reports to PDF
File conv = new File("Report Forms/");
String[] filesconv = conv.list(only);
for (int c = 0; c < filesconv.length; c++) {
    PdfWriter writer = null;
    try {
        Document output = new Document(PageSize.B4);
        Rectangle page = output.getPageSize();
        page.setBackgroundColor(new java.awt.Color(255, 255, 255));
        FileInputStream fs = new FileInputStream("Report Forms/" + filesconv[c]);
        FileOutputStream file = new FileOutputStream(new File("Report Forms/" + name + " " + exa + " FORM " + level + " " + year + ".pdf"));
        DataInputStream in =new DataInputStream(fs);
        BufferedReader br = new BufferedReader(new InputStreamReader( in ));

        writer = PdfWriter.getInstance(output, file);
        writer.createXmpMetadata();

        //define the  font for the disclaimer.
        com.lowagie.text.Font fontfooter = new
        com.lowagie.text.Font(com.lowagie.text.Font.COURIER, 12, com.lowagie.text.Font.BOLD);
        fontfooter.setColor(new java.awt.Color(0, 52, 154));

        output.newPage();
        writer.setPageEvent(new CustomBorder());
        output.open();
        writer.open();

        FileInputStream fsname = new FileInputStream("Report Forms/" + filesconv[c]);
        BufferedReader brname = new BufferedReader(new InputStreamReader(fsname));
        for (int p = 0; p < 0; p++) {
            brname.readLine();
        }
        String custname = brname.readLine();
        // System.out.println(custname);
        com.lowagie.text.Font f1 = new com.lowagie.text.Font(com.lowagie.text.Font.COURIER, 12, com.lowagie.text.Font.BOLD);
        f1.setColor(Color.BLACK);
        output.add(new Paragraph(new Phrase(custname, f1)));
        Image image = Image.getInstance("Student Images/" + num + ".png");
        image.setAlignment(Image.ALIGN_RIGHT);
        image.setAbsolutePosition(450f, 10f);
        image.scalePercent(60, 50);
        Chunk chunk = new Chunk(image, 0, -20);
        HeaderFooter header = new HeaderFooter(new Phrase(chunk), false);
        header.setAlignment(Element.ALIGN_RIGHT);
        header.setBorder(Rectangle.NO_BORDER);
        output.setHeader(header);

        String line = "";
        int lineNo = br.read();
        while ((line = br.readLine()) != null) {
            for (lineNo = 0; br.ready(); lineNo++) {
                if (lineNo % 2 == 1) {
                    line = br.readLine();
                    com.lowagie.text.Font f2 = new com.lowagie.text.Font(com.lowagie.text.Font.COURIER, 12, com.lowagie.text.Font.BOLD);
                    f2.setColor(Color.BLACK);
                    Paragraph p1 = new Paragraph(line, f2);
                    p1.setAlignment(Element.TABLE);
                    PdfPTable table = new PdfPTable(1);
                    table.setWidthPercentage(100);
                    PdfPCell cell = new PdfPCell();
                    cell.setBackgroundColor(new java.awt.Color(247, 246, 243));
                    cell.setBorder(Rectangle.NO_BORDER);
                    cell.setUseBorderPadding(true);
                    cell.setPadding(0);
                    cell.setBorderColor(new java.awt.Color(247, 246, 243));
                    cell.addElement(p1);
                    table.addCell(cell);
                    output.add(table);

                } else {
                    line = br.readLine();
                    com.lowagie.text.Font f2 = new com.lowagie.text.Font(com.lowagie.text.Font.COURIER, 12, com.lowagie.text.Font.BOLD);
                    f2.setColor(new java.awt.Color(0, 52, 154));
                    Paragraph p1 = new Paragraph(line, f2);
                    p1.setAlignment(Element.TABLE);
                    PdfPTable table = new PdfPTable(1);
                    table.setWidthPercentage(100);
                    PdfPCell cell = new PdfPCell();
                    cell.setBorder(Rectangle.NO_BORDER);
                    cell.setBorderWidthBottom(1f);

                    cell.setUseBorderPadding(true);
                    cell.setPadding(0);
                    cell.setBorderColor(new java.awt.Color(255, 255, 255));
                    cell.addElement(p1);
                    table.addCell(cell);
                    // output.add(page);
                    output.add(table);
                }
            }
        }
        output.close();
        file.close();
        fs.close();
        fsname.close(); in .close();
        writer.close();
    } catch(Exception ce) {
        JOptionPane.showMessageDialog(this, ce, "Error", JOptionPane.PLAIN_MESSAGE);
    }
}

如果我没有添加任何图像，则转换进行得很好，但是当我添加图像时，PDF 文件生成的大小为 0KB，当您尝试打开时，会出现错误，因为文件已损坏而无法打开。

4

1 回答 1

5

可以帮助您将图像和图像标题添加到 pdf。

Image image1 = Image.getInstance("sample.png");
image1.setAlignment(Element.ALIGN_CENTER);
image1.scaleAbsolute(450, 250);
//Add to document
document.add(image1);
Paragraph imgCaption = new Paragraph(" Sample image-1", imgcaption);
Summary.setAlignment(Element.ALIGN_LEFT);
Summary.setSpacingAfter(10f);
document.add(imgCaption);
于 2018-12-10T10:58:47.780 回答