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我正在尝试生成PDF。所有其他的事情都工作正常，唯一的问题是当我添加一个表头添加两次。iText5：创建PDF时，标题内容将出现两次
这里是PDF我得到的截图： -
背景，我可以修复它以后帮我固定通过部分满足。
这里是我的GeneratePDFUtil类： -
package genetatePDF;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import com.itextpdf.text.BadElementException;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfWriter;
public class GeneratePDFUtil {
private static float topRightTextSpace = -2f;
private static float signatureWidth = 70f;
private static float signatureHeight = 20f;
static String LogoUrl = "https://www.stockfreeimages.com/Company-Logo-Ending-Y-thumb4456521.jpg";
private static String SIGNATURE = "Signature";
public static void main(String[] args) throws MalformedURLException, DocumentException, IOException {
generatePrescriptionPdf();
}
public static void generatePrescriptionPdf() throws DocumentException, MalformedURLException, IOException {
Document document = new Document(PageSize.A4);
document.setMargins(36, 36, 6, 36);
String name = "try_" + System.currentTimeMillis() + ".pdf";
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(name));
Rectangle rect = new Rectangle(36, 0, 550, 780);
writer.setBoxSize("art", rect);
HeaderFooterPageEvents event = new HeaderFooterPageEvents();
event.setHeader(LogoUrl);
writer.setPageEvent(event);
document.open();
document.add(spaceTable(8));
document.add(topSpaceTable(4));
float[] threeColumnWidth = { 1, 1, 1 };
PdfPTable table = new PdfPTable(3);
table.setWidthPercentage(100);
table.setWidths(threeColumnWidth);
table.addCell(leftBorderColumn("Id: ", "12345"));
table.addCell(noBorderColumn("Date: ", "13/02/2017"));
table.addCell(rightBorderColumn("ID: ", "Abc35"));
document.add(table);
table.deleteLastRow();
table.addCell(leftBorderColumn("Name: ", "Manshavi"));
table.addCell(noBorderColumn("Age: ", "23"));
table.addCell(rightBorderColumn("Gender: ", "Male"));
document.add(table);
table.deleteLastRow();
table.addCell(leftBorderColumn("Name: ", "Kumar"));
table.addCell(noBorderColumn("Number: ", "1234"));
table.addCell(rightBorderColumn("Specialization: ", "Java"));
document.add(table);
for (int i = 0; i < 5; i++) {
PdfPCell cell1 = new PdfPCell(new Paragraph("cell 1"));
cell1.setBorderColor(BaseColor.BLUE);
cell1.setPaddingLeft(10);
cell1.setHorizontalAlignment(Element.ALIGN_CENTER);
cell1.setVerticalAlignment(Element.ALIGN_MIDDLE);
PdfPCell cell2 = new PdfPCell(new Paragraph("cell 2"));
cell2.setBorderColor(BaseColor.GREEN);
cell2.setPaddingLeft(50);
cell2.setHorizontalAlignment(Element.ALIGN_BASELINE);
cell2.setVerticalAlignment(Element.ALIGN_RIGHT);
PdfPCell cell3 = new PdfPCell(new Paragraph("cell 3"));
cell3.setBorderColor(BaseColor.GRAY);
cell3.setPaddingLeft(10);
cell3.setHorizontalAlignment(Element.ALIGN_JUSTIFIED);
cell3.setVerticalAlignment(Element.ALIGN_JUSTIFIED_ALL);
table.deleteLastRow();
table.addCell(cell1);
table.addCell(cell2);
table.addCell(cell3);
document.add(table);
}
document.add(spaceTable(8));
Paragraph paragraph = addParagraphContent(SIGNATURE, Font.NORMAL, topRightTextSpace);
Image signImage = Image.getInstance(
"https://thumbs.dreamstime.com/z/selfie-dogs-couple-dog-taking-together-smartphone-40248448.jpg");
signImage.scaleToFit(signatureWidth, signatureHeight);
signImage.setAlignment(Element.ALIGN_RIGHT);
document.add(signImage);
paragraph.setSpacingAfter(2);
paragraph.setAlignment(Element.ALIGN_RIGHT);
document.add(paragraph);
paragraph = addParagraphContent("Name ", Font.BOLD, topRightTextSpace);
paragraph.setAlignment(Element.ALIGN_RIGHT);
document.add(paragraph);
document.close();
writer.close();
}
private static PdfPTable spaceTable(int height) {
PdfPTable table = new PdfPTable(1);
table.setWidthPercentage(100);
PdfPCell cell = new PdfPCell();
cell.setFixedHeight(height);
cell.setBorder(Rectangle.NO_BORDER);
table.addCell(cell);
return table;
}
private static PdfPTable topSpaceTable(int height) {
PdfPTable table = new PdfPTable(1);
table.setWidthPercentage(100);
PdfPCell cell = new PdfPCell();
cell.setFixedHeight(height);
cell.setBorder(Rectangle.LEFT | Rectangle.TOP | Rectangle.RIGHT);
table.addCell(cell);
return table;
}
// alphabetType is like BOLD or NORMAL type
private static Paragraph addParagraphContent(String content, int alphabetType, float spacingAfter) {
Paragraph paragraph = new Paragraph(content, new Font(Font.FontFamily.TIMES_ROMAN, 10, alphabetType));
paragraph.setSpacingAfter(spacingAfter);
return paragraph;
}
private static PdfPCell leftBorderColumn(String boldContent, String normalContent) {
Paragraph resultField = new Paragraph(boldContent, new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.BOLD));
resultField.setFont(new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.NORMAL));
resultField.add(normalContent);
PdfPCell cell = new PdfPCell(resultField);
cell.setBorder(Rectangle.LEFT);
cell.setPaddingLeft(10);
cell.setHorizontalAlignment(Element.ALIGN_LEFT);
cell.setVerticalAlignment(Element.ALIGN_CENTER);
return cell;
}
private static PdfPCell rightBorderColumn(String boldContent, String normalContent) {
Paragraph resultField = new Paragraph(boldContent, new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.BOLD));
resultField.setFont(new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.NORMAL));
resultField.add(normalContent);
PdfPCell cell = new PdfPCell(resultField);
cell.setBorder(Rectangle.RIGHT);
cell.setPaddingLeft(10);
cell.setHorizontalAlignment(Element.ALIGN_MIDDLE);
cell.setVerticalAlignment(Element.ALIGN_CENTER);
return cell;
}
private static PdfPCell noBorderColumn(String boldContent, String normalContent) {
Paragraph resultField = new Paragraph(boldContent, new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.BOLD));
resultField.setFont(new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.NORMAL));
resultField.add(normalContent);
PdfPCell cell = new PdfPCell(resultField);
cell.setBorder(Rectangle.NO_BORDER);
cell.setPaddingLeft(10);
cell.setHorizontalAlignment(Element.ALIGN_MIDDLE);
cell.setVerticalAlignment(Element.ALIGN_CENTER);
return cell;
}
}
class HeaderFooterPageEvents extends PdfPageEventHelper {
private static String FULFILLED_BY = "Fulfilled By";
protected String imageUrl;
public void setHeader(String imageUrl) {
this.imageUrl = imageUrl;
}
public void onStartPage(PdfWriter writer, Document document) {
Rectangle rect = writer.getBoxSize("art");
try {
Image image = Image.getInstance(imageUrl);
image.scaleToFit(150, 300);
image.setAbsolutePosition(rect.getLeft(), rect.getTop() - 20);
image.setSpacingAfter(10);
image.setSpacingBefore(10);
document.add(image);
PdfPTable table = new PdfPTable(1);
table.setHorizontalAlignment(Element.ALIGN_RIGHT);
table.setWidthPercentage(100);
table.setTotalWidth(180f);
PdfPCell cell = new PdfPCell(new Phrase(FULFILLED_BY, new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.BOLD)));
cell.setBorder(Rectangle.NO_BORDER);
table.addCell(cell);
cell = new PdfPCell(new Phrase("Shope Name",new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.NORMAL)));
cell.setBorder(Rectangle.NO_BORDER);
table.addCell(cell);
cell = new PdfPCell(new Phrase("Address1",new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.NORMAL)));
cell.setBorder(Rectangle.NO_BORDER);
table.addCell(cell);
cell = new PdfPCell(new Phrase("Address2, City Name",new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.NORMAL)));
cell.setBorder(Rectangle.NO_BORDER);
table.addCell(cell);
cell = new PdfPCell(new Phrase("Cont. no.:1234454",new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.NORMAL)));
cell.setBorder(Rectangle.NO_BORDER);
table.addCell(cell);
cell = new PdfPCell(new Phrase("Email:[email protected]",new Font(Font.FontFamily.TIMES_ROMAN, 10, Font.NORMAL)));
cell.setBorder(Rectangle.NO_BORDER);
table.addCell(cell);
table.writeSelectedRows(0, -1, rect.getRight() - table.getTotalWidth(), document.top(), writer.getDirectContent());
document.add(table);
} catch (BadElementException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
}
}
}
iText开发人员强烈建议不要在'onStartPage'中添加任何内容，而应使用'onEndPage'代替。甚至不使用'document.add'。 – mkl