剛用itext實現了一個生成PDF加水印

其中遇到的問題是它對中文支援不好,專門寫了對中文的處理

先看效果圖:

maven包

        <dependency>
            <groupId>com.lowagie</groupId>
            <artifactId>itext</artifactId>
            <version>4.2.1</version>
        </dependency>

java程式碼

package
 
 com.helper.pdf;

import com.itextpdf.text.*;
import com.itextpdf.text.html.simpleparser.HTMLWorker;
import com.itextpdf.text.pdf.*;
import com.travelsky.helper.FileHelper;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.StringReader;
import java.util.HashMap;
import
 
 java.util.List;


public class PDFHelper {
    public static void main(String[] args) throws Exception {
        String templatePath="E:/workspace/pssMQ/msgCore/src/main/java/com/helper/temp.html";
        String targetPath="E:/temp/購票證明3.pdf";
        String watermarkPath="e:/temp/gongzhang.png";
        createPdfWithMark(templatePath,targetPath,watermarkPath,400
 
,400);
    }


    /**
     * 建立PDF 帶水印
     * @param htmlFile
     * @param targetUrl
     * @param markPicUrl
     * @param xCoord
     * @param yCoord
     * @throws Exception
     */
    public static void createPdfWithMark(String htmlFile,String targetUrl,String markPicUrl,int xCoord,int yCoord) throws Exception {
        String tempPdf="e:/temp/"+Thread.currentThread().getId()+"temp.pdf";
        createPdfByHtmlFile(htmlFile,tempPdf);
        addPdfMark(tempPdf, targetUrl, markPicUrl, xCoord, yCoord, 1);
    }

    /**
     * 建立PDF
     * @param htmlFile
     * @param targetUrl
     * @return
     * @throws Exception
     */
    public static PdfWriter createPdfByHtmlFile(String htmlFile,String targetUrl) throws Exception {
        String html = FileHelper.readFile(htmlFile);
        return createPdfByHtml(html,targetUrl);
    }


    public static PdfWriter createPdfByHtml(String html,String targetUrl) throws Exception {

        List<Element> parseToList = HTMLWorker.parseToList(new StringReader(html), null, new HashMap<String, Object>());
        Document d = new Document(PageSize.A4);

        PdfWriter writer=PdfWriter.getInstance(d, new FileOutputStream(new File(targetUrl)));
        d.open();

        for (Element e : parseToList) {
            fixChineseCoding(e);
            d.add(e);
        }
        System.out.println("已完成");
        d.close();

        return writer;
    }

    public static void addPdfMark(String InPdfFile, String outPdfFile, String markImagePath,int xCoord,int yCoord, int pageSize) throws Exception {

        PdfReader reader = new PdfReader(InPdfFile, "PDF".getBytes());

        PdfStamper stamp = new PdfStamper(reader, new FileOutputStream(outPdfFile));

        Image img = Image.getInstance(markImagePath);// 插入水印

        img.setAbsolutePosition(xCoord, yCoord);


        for(int i = 1; i <= pageSize; i++) {

            PdfContentByte under = stamp.getUnderContent(i);

            under.addImage(img);

        }

        stamp.close();// 關閉

        File tempfile = new File(InPdfFile);

        if(tempfile.exists()) {

            tempfile.delete();
        }

    }



    private static BaseFont bfChinese;
    private static Font cfont ;

    /**
     * 修正中文亂碼問題
     * 現只支援table與p,div,span等
     * @param e
     * @return
     * @throws IOException
     * @throws DocumentException
     */
    private static void  fixChineseCoding(Element e) throws IOException, DocumentException {
        if(bfChinese==null){
            bfChinese = BaseFont.createFont("C:/Windows/Fonts/msyh.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
        }
        if(e instanceof Paragraph){
            for(Chunk c:e.getChunks()){//解決中文亂碼
                cfont = new Font(bfChinese, 20, Font.NORMAL);
                cfont.setColor(c.getFont().getColor());
                cfont.setSize(c.getFont().getSize());
                c.setFont(cfont);
            }
            return;
        }
        if(e instanceof PdfPTable){
            PdfPTable table=(PdfPTable)e;
            for(PdfPRow row:table.getRows()){
                for(PdfPCell cell:row.getCells()){
                    if(cell!=null&&cell.getCompositeElements()!=null){
                        for(Element comp:cell.getCompositeElements()){
                            fixChineseCoding(comp);
                        }
                    }
                }
            }
        }
    }

}

html模版程式碼

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
</head>
<body style="text-align:center;">
<div style="text-align:center;width:80%;">
    <p style="font-size:18;">遠東航空</p>
    <p style="font-size:14;">Far Eastern Air Transport</p>
    <p style="font-size:10;">購票證明單</p>
    <p style="font-size:10;">TICKET RECEIPT</p>
</div>
<div style="text-align:right;">
    <p style="font-size:10;">日期&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 年&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;月&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;日</p>
</div>
<span>&nbsp;</span>
<table  border="1" align="left" style="width:80%;">
    <tr><td>
        <table border="0" style="font-size:10;">
            <tr>
                <td style="text-align:left;">搭機人：_NAME_  </td>
                <td  style="text-align:left;">機票號碼：_TICKET_NO_</td>
            </tr>
            <tr>
                <td colspan="2">&nbsp;</td>
            </tr>
            <tr>
                <td  style="text-align:left;">機票款數：_NUM_</td>
                <td  style="text-align:left;"> 日期及班次：_TICKET_DATE_ </td>
            </tr>
            <tr>
                <td colspan="2">&nbsp;</td>
            </tr>
            <tr>
                <td colspan="2"  style="text-align:left;">航程&nbsp;&nbsp;ROUTINGS&nbsp;：&nbsp;自&nbsp;FROM：&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;至&nbsp;TO：&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;至&nbsp;TO：&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </td>
            </tr>
        </table>
    </td></tr>
</table>
</body>
</html>