Export PDF with watermark

background

Sometimes we need to export a single pdf data , You need to add some watermarks or pictures on it

Export sample

maven rely on

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13</version>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext-asian</artifactId>
    <version>5.2.0</version>
</dependency>

test demo

public class PDFCellUtils {
    
    /** *  Create cells ( Specified font ) * @param value  Cells display value text  * @param font  Text font  * @return */
    public static PdfPCell createCell(String value, Font font) {
    
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(Element.ALIGN_CENTER);
        cell.setPhrase(new Phrase(value, font));
        cell.setPadding(6.0f);
        return cell;
    }

    /** *  Create cells （ Specified font 、 Horizontal alignment ） * @param value  value  * @param font  typeface  * @param align  Horizontal alignment  * @return */
    public static PdfPCell createCell(String value, Font font, int align) {
    
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setPhrase(new Phrase(value, font));
        cell.setPadding(6.0f);
        return cell;
    }
    /** *  Create cells （ Specified font 、 Horizontal residence ..、 Cells span x columns ） * @param value  value  * @param font  typeface  * @param align  Horizontal alignment  * @param colspan  Cells span x Merge  * @return */
    public static PdfPCell createCell(String value, Font font, int align, int colspan) {
    
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setPhrase(new Phrase(value, font));
        cell.setPadding(6.0f);
        return cell;
    }

    /** *  Create cells （ Specified font 、 Horizontal alignment 、 Cells span x columns ,  Cells span y merger ） * @param value * @param font * @param align * @param colspan * @param rowspan * @return */
    public static PdfPCell createCell(String value, Font font, int align, int colspan, int rowspan) {
    
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setRowspan(rowspan);
        cell.setPhrase(new Phrase(value, font));
        cell.setPadding(6.0f);
        return cell;
    }

    /** *  Create cells （ Specified font 、 Horizontal residence ..、 Cells span x columns 、 Set the margin inside the cell ） * @param value  value  * @param font  typeface  * @param align  Horizontal alignment  * @param colspan  Cells span x columns  * @param boderFlag  Set the margin inside the cell  * @return */
    public static PdfPCell createCell(String value, Font font, int align, int colspan, boolean boderFlag) {
    
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setPhrase(new Phrase(value, font));
        cell.setPadding(6.0f);
        if (!boderFlag) {
    
            cell.setBorder(0);
        } else if (boderFlag) {
    
            cell.setBorder(0);
        }
        return cell;
    }
    /** *  Create cells （ Specified font 、 level ..、 Border width ：0 No border 、 padding ） * @param value  value  * @param font  Subgraphs  * @param align  Horizontal alignment  * @param borderWidth  Border width ：0 No border  * @param paddingSize * @param flag * @return */
    public static PdfPCell createCell(String value, Font font, int align, float[] borderWidth, float[] paddingSize, boolean flag) {
    
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setPhrase(new Phrase(value, font));
        cell.setBorderWidthLeft(borderWidth[0]);
        cell.setBorderWidthRight(borderWidth[1]);
        cell.setBorderWidthTop(borderWidth[2]);
        cell.setBorderWidthBottom(borderWidth[3]);
        cell.setPaddingTop(paddingSize[0]);
        cell.setPaddingBottom(paddingSize[1]);
        if (flag) {
    
            cell.setColspan(2);
        }
        return cell;
    }
}

public class PdfText {
    



    //  Title font 
    private static Font title_font;
    private static Font text_font;
    //  Bold text 
    private static Font bold_text_Font;

    //  Indent 
    private static String TABLE = "\t";
    //  Maximum width 
    private static int maxWidth = 520;


    static {
    
        try {
    
            BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            title_font = new Font(bfChinese, 26, Font.BOLD);
            text_font = new Font(bfChinese, 10, Font.NORMAL);
            bold_text_Font = new Font(bfChinese, 10, Font.BOLD);


        } catch (Exception e) {
    
            log.error(" Payment note : PDF Font initialization exception . STSong-Light, UniGB-UCS2-H", e);
        }
    }

    public static final String imgPath_native = "/Users/dasouche/IdeaProjects/test/image/test2.png";

    public static void generatePDF(Document document) throws Exception {
    
        //  title 
        Paragraph title = new Paragraph("xxx Approval form ", title_font);
        // Center text  (0 Keep to the left /1 In the middle /2 Keep right )
        title.setAlignment(1);
        title.setSpacingBefore(80f); // Set the space on the paragraph 
        title.setSpacingAfter(10f); // Set the space below the paragraph 
        document.add(title);


        //  form   Default 7 Column 
        PdfPTable table = createTable(8, Element.ALIGN_CENTER);
        table.addCell(PDFCellUtils.createCell("xxx department ", text_font, Element.ALIGN_LEFT, 4, false));
        table.addCell(PDFCellUtils.createCell(" Application time ：2022 year 4 month 28 Japan ", text_font, Element.ALIGN_RIGHT, 4, false));


        table.addCell(PDFCellUtils.createCell(" Approval code ", bold_text_Font, Element.ALIGN_CENTER, 2, 1));
        table.addCell(PDFCellUtils.createCell("CG3378612964", text_font, Element.ALIGN_CENTER, 1));
        table.addCell(PDFCellUtils.createCell(" Number ", bold_text_Font));
        table.addCell(PDFCellUtils.createCell("BM1890", text_font));

        table.addCell(PDFCellUtils.createCell(" Applicant ", bold_text_Font, Element.ALIGN_CENTER, 2));
        table.addCell(PDFCellUtils.createCell(" Wu Yanzu ", text_font, Element.ALIGN_LEFT, 6));

        table.addCell(PDFCellUtils.createCell(" Applicant department ", bold_text_Font, Element.ALIGN_CENTER, 2));
        table.addCell(PDFCellUtils.createCell("xx department ", text_font, Element.ALIGN_LEFT, 6));

        table.addCell(PDFCellUtils.createCell(" Money ", bold_text_Font, Element.ALIGN_CENTER, 2));
        table.addCell(PDFCellUtils.createCell(" Cloud service fees ", text_font, Element.ALIGN_LEFT, 6));

        table.addCell(PDFCellUtils.createCell(" Detailed ", bold_text_Font, Element.ALIGN_CENTER, 2, 2));
        table.addCell(PDFCellUtils.createCell(" Subject matter ", text_font));
        table.addCell(PDFCellUtils.createCell("rds", text_font));
        table.addCell(PDFCellUtils.createCell(" amount of money ( element )", bold_text_Font));
        table.addCell(PDFCellUtils.createCell("99999", text_font));
        table.addCell(PDFCellUtils.createCell(" remarks ", bold_text_Font));
        table.addCell(PDFCellUtils.createCell("B0321", text_font));

        table.addCell(PDFCellUtils.createCell(" Subject matter ", bold_text_Font));
        table.addCell(PDFCellUtils.createCell(" Cloud server ECS", text_font));
        table.addCell(PDFCellUtils.createCell(" amount of money ( element )", bold_text_Font));
        table.addCell(PDFCellUtils.createCell("99999", text_font));
        table.addCell(PDFCellUtils.createCell(" remarks ", bold_text_Font));
        table.addCell(PDFCellUtils.createCell("B0322", text_font));

        byte[] bFile = Files.readAllBytes(new File(imgPath_native).toPath());
        // Local file mode  , You can also use pictures directly url
        Image image = Image.getInstance(bFile);
        image.setAlignment(Image.ALIGN_CENTER);
        image.scalePercent(10); // Scale to scale 
        image.setAbsolutePosition(400f, 720f);
        document.add(image);

        document.add(table);

    }


    public static void main(String[] args) {
    
        try {
    

            Document document = new Document();

            File fileDir = new File("./pdf");
            if (!fileDir.exists()) {
    
                fileDir.mkdirs();
            }
            File file = new File("./pdf/PDFDemo.pdf");
            try {
    
                file.createNewFile();
            } catch (IOException e) {
    
                return;
            }
            PdfWriter.getInstance(document, new FileOutputStream(file));
            document.open();
            generatePDF(document);
            document.close();
            System.out.println(file.getName());
        } catch (Exception e) {
    
            e.printStackTrace();
        }
    }

    /** *  Create default column width , Specify the number of columns 、 level ( In the middle 、 Right 、 Left ) Table for  * @param colNumber * @param align * @return */
    public static PdfPTable createTable(int colNumber, int align) {
    
        PdfPTable table = new PdfPTable(colNumber);
        try {
    
            table.setTotalWidth(maxWidth);
            table.setLockedWidth(true);
            table.setHorizontalAlignment(align);
            table.getDefaultCell().setBorder(1);
        } catch (Exception e) {
    
            e.printStackTrace();
        }
        return table;
    }

}

picture