itext字体颜色在第一页变暗

Question

我正在使用iText 2.1.7，我使用writer.getDirectcontent（）方法在绝对位置添加页眉和页脚。除了第一页中的字体比第二页更暗以外，所有工作正常。

请注意第一页和第二页中的页眉和页脚

anyhelp？

这就是我做的

Reader stringReader = new StringReader(svgXmlDoc);

    Document document = new Document(PageSize.A4.rotate());

    ByteArrayOutputStream content = new ByteArrayOutputStream();
    try {

        PdfWriter writer = PdfWriter.getInstance(document, content);

        document.open();

        PdfService event = new PdfService();
        event.setHeader(date.toString());

        event.onOpenDocument(writer, document);
        event.onEndPage(writer, document);
        event.onCloseDocument(writer, document);
        writer.setPageEvent(event);

        Image image1 = Image.getInstance("Infinity-Loop.png");

        image1.scalePercent(35);

        PdfPTable signature = new PdfPTable(numberOfSignature);

        signature.setTotalWidth(document.getPageSize().getWidth()
                - document.leftMargin() - document.rightMargin());
        signature.setLockedWidth(true);
        signature.setWidthPercentage(100);
        signature.getDefaultCell().setFixedHeight(20);

        signature.getDefaultCell().setHorizontalAlignment(
                Element.ALIGN_RIGHT);
        for (int i = 0; i < numberOfSignature; i++) {
            PdfPCell cell = new PdfPCell(new Paragraph(
                    String.valueOf("____________")));
            cell.setBorder(Rectangle.NO_BORDER);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            signature.addCell(cell);
        }

        PdfPTable header = new PdfPTable(3);

        float[] columnWidths = {1f,2f,1f};
         header.setWidths(columnWidths);
        header.setTotalWidth(document.getPageSize().getWidth()
                - document.leftMargin() - document.rightMargin());
        header.setLockedWidth(true);
        header.setWidthPercentage(100);
         header.getDefaultCell().setPadding(15);
        header.getDefaultCell().setBorder(Rectangle.NO_BORDER);

        PdfPCell logocell = new PdfPCell(image1, false);
        logocell.setRowspan(3);
        logocell.setFixedHeight(72);
        logocell.setBorder(Rectangle.NO_BORDER);
        header.addCell(logocell);

        PdfPCell Title = new PdfPCell(new Phrase(title,
                FontFactory.getFont(FontFactory.TIMES_ROMAN, 18,
                        Font.PLAIN, new Color(0, 0, 0))));
        Title.setBorder(Rectangle.NO_BORDER);
        Title.setHorizontalAlignment(Element.ALIGN_CENTER);
        header.addCell(Title);
        header.addCell("");
        header.completeRow();
        PdfPCell SubTitle = new PdfPCell(new Phrase(subTitle));
        SubTitle.setBorder(Rectangle.NO_BORDER);
        SubTitle.setHorizontalAlignment(Element.ALIGN_CENTER);
        header.addCell(SubTitle);
        header.addCell("");
        header.completeRow();
        PdfPCell dataRange = new PdfPCell(new Phrase(
                dateRange));
        dataRange.setBorder(Rectangle.NO_BORDER);
        dataRange.setHorizontalAlignment(Element.ALIGN_CENTER);
        header.addCell(dataRange);
        header.addCell("");
        header.completeRow();
        ArrayList tmp = header.getRows(0, header.getRows().size());
        header.getRows().clear();
        header.getRows().addAll(tmp);

        int width = (int) ((int) document.getPageSize().getWidth()
                - document.leftMargin() - document.rightMargin());
        int height = 350;
        PdfContentByte cb = writer.getDirectContent();
        PdfTemplate template = cb.createTemplate(width, height);
        Graphics2D g2 = template.createGraphics(width, height);

        PrintTranscoder prm = new PrintTranscoder();
        TranscoderInput ti = new TranscoderInput(stringReader);
        prm.transcode(ti, null);

        PageFormat pg = new PageFormat();
        Paper pp = new Paper();
        pp.setSize(width, height);
        pp.setImageableArea(0, 0, width, height);
        pg.setPaper(pp);
        prm.print(g2, pg, 0);
        g2.dispose();

        ImgTemplate img = new ImgTemplate(template);
        img.setAbsolutePosition(document.left(), document.topMargin() + 100);
        document.add(img);
        signature.writeSelectedRows(0, -1, document.left(),
                document.bottom() + document.bottomMargin() * 2,
                writer.getDirectContent());

        header.writeSelectedRows(0, -1, document.left(), document.top(),
                writer.getDirectContent());
        document.newPage();

    PdfPTable statisticsTitle=new PdfPTable(1);
    statisticsTitle.setTotalWidth(document.right() - document.left());
    statisticsTitle.setWidthPercentage(100);
    PdfPCell titleCell= new PdfPCell(new Paragraph("Statistics Report"));
    titleCell.setBorder(Rectangle.NO_BORDER);
    titleCell.setHorizontalAlignment(Element.ALIGN_CENTER);
    statisticsTitle.addCell(titleCell);
    statisticsTitle.writeSelectedRows(0, -1, document.left(), document.top()
            - document.topMargin() * 2 - 10, writer.getDirectContent());

        PdfPTable table;
        if(measurementType.equals("Temp")){
            table = new PdfPTable(6);
        }
        else{
            table = new PdfPTable(11);
        }
        table.setTotalWidth(document.right() - document.left());
        table.setWidthPercentage(100);
        table.setHeaderRows(1);


        PdfPCell h1 = new PdfPCell(new Paragraph("Description"));
        h1.setGrayFill(0.7f);
        h1.setRowspan(2);
        h1.setVerticalAlignment(Element.ALIGN_MIDDLE);
        h1.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(h1);

        PdfPCell h2 = new PdfPCell(new Paragraph("Temperature"));
        h2.setGrayFill(0.7f);
        h2.setColspan(5);
        h2.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(h2);

        if(measurementType.equals("TempHumi")){
            PdfPCell h3 = new PdfPCell(new Paragraph("Humidity"));
            h3.setGrayFill(0.7f);
            h3.setColspan(5);
            h3.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(h3);
        }
        table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_CENTER);
        PdfPCell tc1 = new PdfPCell(new Paragraph("Min"));
        tc1.setGrayFill(0.7f);
        tc1.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(tc1);

        PdfPCell tc2 = new PdfPCell(new Paragraph("Max"));
        tc2.setGrayFill(0.7f);
        tc2.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(tc2);

        PdfPCell tc3 = new PdfPCell(new Paragraph("Avg"));
        tc3.setGrayFill(0.7f);
        tc3.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(tc3);

        PdfPCell tc4 = new PdfPCell(new Paragraph("Std"));
        tc4.setGrayFill(0.7f);
        tc4.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(tc4);

        PdfPCell tc5 = new PdfPCell(new Paragraph("Mkt"));
        tc5.setGrayFill(0.7f);
        tc5.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(tc5);

        if(measurementType.equals("TempHumi")){
        PdfPCell hc1 = new PdfPCell(new Paragraph("Min"));
        hc1.setGrayFill(0.7f);
        hc1.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(hc1);

        PdfPCell hc2 = new PdfPCell(new Paragraph("Max"));
        hc2.setGrayFill(0.7f);
        hc2.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(hc2);

        PdfPCell hc3 = new PdfPCell(new Paragraph("Avg"));
        hc3.setGrayFill(0.7f);
        hc3.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(hc3);

        PdfPCell hc4 = new PdfPCell(new Paragraph("Std"));
        hc4.setGrayFill(0.7f);
        hc4.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(hc4);

        PdfPCell hc5 = new PdfPCell(new Paragraph("Mkt"));
        hc5.setGrayFill(0.7f);
        hc5.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(hc5);
        }



        ArrayList tmpTable = table.getRows(0, table.getRows().size());
        table.getRows().clear();
        table.getRows().addAll(tmpTable);

        JsonObject listloggerdatastatistics = ReportService
                .getStatisticsDetails(serialnumberlist);

        System.out.println("Json "+listloggerdatastatistics.get("Sensormodellist"));

        for (int row = 0; row < listloggerdatastatistics.get("Sensormodellist").getAsJsonArray().size(); row++) {
            JsonObject jsonobj=listloggerdatastatistics.get("Sensormodellist").getAsJsonArray().get(row).getAsJsonObject();
            if (row > 20 && row % 21 == 0) {

                table.completeRow();

                table.writeSelectedRows(0, 22, document.left(),
                        document.top() - document.topMargin() * 2 - 10,
                        writer.getDirectContent());
                table.deleteBodyRows();
                table.setSkipFirstHeader(true);
                signature.writeSelectedRows(0, -1, document.left(),
                        document.bottom() + document.bottomMargin() * 3,
                        writer.getDirectContent());

                header.writeSelectedRows(0, -1, document.left(),
                        document.top(), writer.getDirectContent());

                document.newPage();
            }



            table.addCell(jsonobj.get("Modeltype").getAsString());
            table.addCell(""+jsonobj.get("Mintemperature").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
            table.addCell(""+jsonobj.get("Maxtemperature").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
            table.addCell(""+jsonobj.get("Avgtemperature").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
            table.addCell(""+jsonobj.get("Stdtemperature").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
            table.addCell(""+jsonobj.get("Mkttemperature").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
            if(measurementType.equals("TempHumi")){
                table.addCell(""+jsonobj.get("Minhumidity").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
                table.addCell(""+jsonobj.get("Maxhumidity").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
                table.addCell(""+jsonobj.get("Avghumidity").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
                table.addCell(""+jsonobj.get("Stdhumidity").getAsBigDecimal().setScale(2, RoundingMode.HALF_UP));
                table.addCell("-");
            }


        }

        table.completeRow();
        table.writeSelectedRows(0, -1, document.left(), document.top()
                - document.topMargin() * 3 - 10, writer.getDirectContent());
        signature.writeSelectedRows(0, -1, document.left(),
                document.bottom() + document.bottomMargin() * 2,
                writer.getDirectContent());
        header.writeSelectedRows(0, -1, document.left(), document.top(),
                writer.getDirectContent());


    } catch (DocumentException e) {
        System.err.println(e);
    }
    document.close();
    content.close();

我正在从SVG构建图形图像，表格数据从数据库中填充

用于添加页脚X的页脚的事件处理程序

public class PdfService extends PdfPageEventHelper {
/** The header text. */
String header;
/** The template with the total number of pages. */
PdfTemplate total;

/**
 * Fills out the total number of pages before the document is closed.
 * 
 * @see com.itextpdf.text.pdf.PdfPageEventHelper#onCloseDocument(com.itextpdf.text.pdf.PdfWriter,
 *      com.itextpdf.text.Document)
 */
@Override
public void onCloseDocument(PdfWriter writer, Document document) {
    total.reset();
    ColumnText
            .showTextAligned(total, Element.ALIGN_LEFT,
                    new Phrase(String.valueOf(writer.getPageNumber() - 1)),
                    2, 2, 0);

}

/**
 * Adds a header to every page
 * 
 * @see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(com.itextpdf.text.pdf.PdfWriter,
 *      com.itextpdf.text.Document)
 */
@Override
public void onEndPage(PdfWriter writer, Document document) {

    PdfPTable table = new PdfPTable(4);
    try {
        table.setWidths(new float[] { (float) (2.25), (float) (1.5), 11, 13 });
        table.setTotalWidth(document.getPageSize().getWidth()
                - document.leftMargin() - document.rightMargin());
        table.setLockedWidth(true);
        table.setWidthPercentage(100);
        table.getDefaultCell().setFixedHeight(20);
        table.getDefaultCell().setBorder(Rectangle.NO_BORDER);

        table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
        table.addCell(String.format("Page %d of", writer.getPageNumber()));
        Image img = Image.getInstance(total);
        Chunk conte = new Chunk(img, 0, 0);
        Phrase chunk = new Phrase(conte);

        PdfPCell cell = new PdfPCell(chunk);
        cell.setBorder(Rectangle.NO_BORDER);
        cell.setHorizontalAlignment(Element.ALIGN_LEFT);
        cell.setVerticalAlignment(Element.ALIGN_TOP);

        table.addCell(cell);
        table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
        table.addCell("SuperAdmin");
        table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
        table.addCell(header);
        table.writeSelectedRows(0, -1, document.leftMargin(),
                document.bottom(), writer.getDirectContent());

    } catch (DocumentException de) {
        throw new ExceptionConverter(de);
    }
}

/**
 * Creates the PdfTemplate that will hold the total number of pages.
 * 
 * @see com.itextpdf.text.pdf.PdfPageEventHelper#onOpenDocument(com.itextpdf.text.pdf.PdfWriter,
 *      com.itextpdf.text.Document)
 */
@Override
public void onOpenDocument(PdfWriter writer, Document document) {
    total = writer.getDirectContent().createTemplate(15, 14);
    // total.setBoundingBox(new Rectangle(-1, 6, 20, 20));
}

/**
 * Allows us to change the content of the header.
 * 
 * @param header
 *            The new header String
 */
public void setHeader(String header) {
    this.header = header;
}
}

Answer 1

在过去，当人们有一个常规字体的字体程序而没有单独的字体文件用于粗体字体时，人们找到了解决此问题的方法，并且Adobe Reader已经过调整以使这种解决方法起作用。

解决方法包括在同一位置编写两次（或更多）相同的内容。 当您添加“第1页，共2页”一次时，字体将显示为常规字体。 当您添加两次时，字体将显示为粗体字体。

在您的情况下会发生这种情况：您要添加两次页脚。 这是错的：

document.open();
PdfService event = new PdfService();
event.setHeader(date.toString());
event.onOpenDocument(writer, document);
event.onEndPage(writer, document);
event.onCloseDocument(writer, document);
writer.setPageEvent(event);

您自己调用event.onEndPage() ，第一次添加页脚。 页面完成后，iText onEndPage()调用onEndPage()方法，再次添加页脚，生成粗体字。

您应该像这样调整您的代码：

PdfService event = new PdfService();
event.setHeader(date.toString());
writer.setPageEvent(event);
document.open();

您应该在打开文档之前将事件声明到PdfWriter实例。 你不应该自己调用onOpenDocument() ， onEndPage()和onCloseDocument()方法！ 它们由iText在内部调用。

您还应该升级到最新版本，原因在FAQ上有解释。 使用开源并且没有任何回报是不明智的。 支持您的开源社区不是慈善事业，这是一件好事。