我有一个程序，我正在为某个组织生成收据。我需要在文档中添加一个waterark作为某种安全性。我在下面添加我的代码。我的PDF生成正常，但如何添加水印？
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.example;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;
import java.awt.Color;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
/**
*
* @author Chandan
*/
public class MoneryRecipt {
// Document m_PdfDocument;
public static void main(String[] args) throws DocumentException, FileNotFoundException
{
Document m_PdfDocument = new Document(PageSize.LETTER, 5, 5, 5, 5);
try
{
DocWriter m_DocWriter;
// PdfWriter m_PdfWriter = null;
PdfWriter writer = PdfWriter.getInstance(m_PdfDocument, new FileOutputStream("E:/aa.pdf"));
Image logo=Image.getInstance("F:/gmc_report.jpg");
m_PdfDocument.open();
Image background = Image.getInstance(logo);
background.setAbsolutePosition(200, 400);
// Phrase watermarkdd = new Phrase("Chandan Sarma", new Font(FontFactory.getFont(FontFactory.HELVETICA, 20,Font.NORMAL,new Color(240,240,240))));
PdfContentByte canvas = writer.getDirectContentUnder();
PdfContentByte addWaterMark;
addWaterMark=writer.getDirectContentUnder();
addWaterMark.addImage(logo);
PdfPTable maintable = new PdfPTable(2);
PdfPCell spece = new PdfPCell();
spece.setBorder(0);
spece.setColspan(2);
spece.setFixedHeight(20f);
spece.setSpaceCharRatio(20f);
maintable.addCell(spece);
Image logo=Image.getInstance("D:/logo_gmcmanin.png");
Paragraph ph = new Paragraph();
ph.add(new Chunk(logo, 0, 0));
ph.add(new Chunk("\n\nGuwahati Municipal Corporation", FontFactory.getFont(FontFactory.TIMES_ROMAN, 10, Font.BOLDITALIC)));
ph.add(new Chunk("\n\nMoney recipt", FontFactory.getFont(FontFactory.TIMES_ROMAN, 10, Font.BOLD)));
PdfPCell heading = new PdfPCell(ph);
// heading.setBorder(1);
heading.setColspan(2);
heading.setHorizontalAlignment(Element.ALIGN_CENTER);
heading.setVerticalAlignment(Element.ALIGN_CENTER);
maintable.addCell(heading);
Paragraph ph2 = new Paragraph();
ph2.add(new Chunk("\nPayment Receipt / Acknowledgment for Property Tax Bill of the ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 10, Font.BOLDITALIC)));
ph2.add(new Chunk("\n\nFinancial Year 2014-15", FontFactory.getFont(FontFactory.TIMES_ROMAN, 10, Font.BOLD)));
PdfPCell reciptHeading = new PdfPCell(ph2);
// heading.setBorder(1);
reciptHeading.setColspan(2);
reciptHeading.setHorizontalAlignment(Element.ALIGN_CENTER);
reciptHeading.setVerticalAlignment(Element.ALIGN_CENTER);
maintable.addCell(reciptHeading);
Paragraph ph3 = new Paragraph();
ph3.add(new Chunk("Receipt No ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
ph3.add(new Chunk(" 2014-15", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
PdfPCell reciptCell=new PdfPCell(ph3);
//reciptCell.setBorder(0);
//reciptCell.setBorderWidthLeft(1);
reciptCell.setBorderWidthBottom(0);
reciptCell.setBorderWidthTop(0);
reciptCell.setBorderWidthRight(0);
reciptCell.setColspan(1);
reciptCell.setHorizontalAlignment(Element.ALIGN_CENTER);
reciptCell.setVerticalAlignment(Element.ALIGN_CENTER);
maintable.addCell(reciptCell);
Paragraph ph4 = new Paragraph();
ph4.add(new Chunk("Date ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
ph4.add(new Chunk("2014-15", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
PdfPCell dateCell=new PdfPCell(ph4);
dateCell.setFixedHeight(20);
//dateCell.setBorder(0);
dateCell.setBorderWidthLeft(0);
dateCell.setColspan(1);
dateCell.setBorderWidthTop(0);
dateCell.setBorderWidthBottom(0);
dateCell.setHorizontalAlignment(Element.ALIGN_CENTER);
dateCell.setVerticalAlignment(Element.ALIGN_CENTER);
maintable.addCell(dateCell);
PdfPCell details = new PdfPCell();
//details.setBorder(0);
details.setColspan(2);
PdfPTable detailsTable = new PdfPTable(2);
detailsTable.setWidthPercentage(65);
PdfPCell ownerCell=new PdfPCell(new Phrase("Owner’s Name ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
ownerCell.setHorizontalAlignment(Element.ALIGN_LEFT);
detailsTable.addCell(ownerCell);
PdfPCell ownernameCell=new PdfPCell(new Phrase("Chandan Sarma ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
ownernameCell.setHorizontalAlignment(Element.ALIGN_RIGHT);
detailsTable.addCell(ownernameCell);
PdfPCell assementIdOldCell=new PdfPCell(new Phrase("Assessment id (old) ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
assementIdOldCell.setHorizontalAlignment(Element.ALIGN_LEFT);
detailsTable.addCell(assementIdOldCell);
PdfPCell assementIdValueCell=new PdfPCell(new Phrase("27-05-7859 ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
assementIdValueCell.setHorizontalAlignment(Element.ALIGN_RIGHT);
detailsTable.addCell(assementIdValueCell);
PdfPCell assementIdNewCell=new PdfPCell(new Phrase("Assessment id (New) ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
assementIdOldCell.setHorizontalAlignment(Element.ALIGN_LEFT);
detailsTable.addCell(assementIdOldCell);
PdfPCell assementIdNewValueCell=new PdfPCell(new Phrase("225642 ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.NORMAL)));
assementIdNewValueCell.setHorizontalAlignment(Element.ALIGN_RIGHT);
detailsTable.addCell(assementIdNewValueCell);
details.setBorderWidthTop(0);
details.setBorderWidthBottom(0);
details.addElement(detailsTable);
maintable.addCell(details);
Paragraph ph6=new Paragraph();
ph6.add(new Chunk("HOUSEHOLD WASTE COLLECTION ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.BOLDITALIC,Color.RED)));
ph6.add(new Chunk("\n\nWard-wise contact number of NGOs for collecting household waste from your doorstep:- ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph6.add(new Chunk("\n\nWard No. 1- 9957047867 Ward No. 17- 9864623744", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph6.add(new Chunk("\n\nWard No. 1- 9957047867 Ward No. 17- 9864623744", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph6.add(new Chunk("\n\nWard No. 1- 9957047867 Ward No. 17- 9864623744", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph6.add(new Chunk("\n\nWard No. 1- 9957047867 Ward No. 17- 9864623744", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph6.add(new Chunk("\n\nWard No. 1- 9957047867 Ward No. 17- 9864623744", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
PdfPCell wasteCollectionHeader=new PdfPCell(ph6);
wasteCollectionHeader.setColspan(1);
wasteCollectionHeader.setHorizontalAlignment(Element.ALIGN_CENTER);
maintable.addCell(wasteCollectionHeader);
Paragraph ph7=new Paragraph();
ph7.add(new Chunk("PROPERTY TAX RELATED GRIEVANCE REDRESSAL MECHANISM ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 8, Font.BOLDITALIC,Color.RED)));
ph7.add(new Chunk("\n\nFor billing or any service grievance, please approach (during office hours) ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph7.add(new Chunk("\n\n •Deputy Commissioner, East Zone, GMC, Bhaya Mama Path, RG Baruah Road, Mobile No: 07399092259 ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph7.add(new Chunk("\n\n •Deputy Commissioner, East Zone, GMC, Bhaya Mama Path, RG Baruah Road, Mobile No: 07399092259 ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph7.add(new Chunk("\n\n •Deputy Commissioner, East Zone, GMC, Bhaya Mama Path, RG Baruah Road, Mobile No: 07399092259 ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph7.add(new Chunk("\n\n •Deputy Commissioner, East Zone, GMC, Bhaya Mama Path, RG Baruah Road, Mobile No: 07399092259 ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
ph7.add(new Chunk("\n\n •Deputy Commissioner, East Zone, GMC, Bhaya Mama Path, RG Baruah Road, Mobile No: 07399092259 ", FontFactory.getFont(FontFactory.TIMES_ROMAN, 6)));
PdfPCell propertyTexRelatedHeader=new PdfPCell(ph7);
propertyTexRelatedHeader.setColspan(1);
propertyTexRelatedHeader.setHorizontalAlignment(Element.ALIGN_CENTER);
maintable.addCell(propertyTexRelatedHeader);
m_PdfDocument.add(maintable);
m_PdfDocument.newPage();
m_PdfDocument.setPageSize(m_PdfDocument.getPageSize());
m_PdfDocument.close();
}
catch(Exception e)
{
System.out.println("Exception is"+e.toString());
}
}
}
答案 0 :(得分：0)
在声明Pdf writer
时添加以下代码行PdfWriter writer = PdfWriter.getInstance(m_PdfDocument, new FileOutputStream("D:/aa.pdf"));
m_PdfDocument.open();
Phrase watermarkdd = new Phrase("Water mark name-", new Font(FontFactory.getFont(FontFactory.HELVETICA, 20,Font.NORMAL,new Color(240,240,240))));
PdfContentByte canvas = writer.getDirectContentUnder();
ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, watermarkdd, 298, 421, 45);
----Your remaining code goes here----------
答案 1 :(得分：0)
我已经使用以下生成水印的代码
解决了这个问题 class PDFBackground extends PdfPageEventHelper {
@Override
public void onEndPage(PdfWriter writer, Document document) {
try {
Image background = Image.getInstance("F:/gmc_report.jpg");
background.setAbsolutePosition(250, 500);
// This scales the image to the page,
// use the image's width & height if you don't want to scale.
float width = document.getPageSize().getWidth();
float height = document.getPageSize().getHeight();
writer.getDirectContentUnder().addImage(background, false);
} catch (DocumentException ex) {
Logger.getLogger(MoneryRecipt.class.getName()).log(Level.SEVERE, null, ex);
} catch (MalformedURLException ex) {
Logger.getLogger(MoneryRecipt.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(MoneryRecipt.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
并通过
将图像写入pdf PdfWriter writer = PdfWriter.getInstance(m_PdfDocument, new FileOutputStream("E:/aa.pdf"));
writer.setPageEvent(new PDFBackground());