java使用itext編輯pdf

一、創建pdf模板

　　使用PDFelement制作pdf模板（數據域的名稱對應后面插入的key）

二、導入maven依賴

        <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>        

三、插入數據和圖片到pdf模板

        Map<String, Object> data；//要插入的數據
        //初始化itext
        //設置編碼
        BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);
        PdfReader pdfReader=new PdfReader(“pdf模板文件路徑”);
        PdfStamper pdfStamper=new PdfStamper(pdfReader, new FileOutputStream(“輸出pdf文件路徑”));
        AcroFields form = pdfStamper.getAcroFields();
        form.addSubstitutionFont(baseFont);

        //寫入數據
        for(String key:data.keySet()){
            String value=data.get(key).toString();
            //key對應模板數據域的名稱
            form.setField(key,value);
        }

        //添加圖片
        int pageNo = form.getFieldPositions("img").get(0).page;
        Rectangle signRect = form.getFieldPositions("img").get(0).position;
        float x = signRect.getLeft();
        float y = signRect.getBottom();
        Image image = Image.getInstance("圖片路徑");
        PdfContentByte under = pdfStamper.getOverContent(pageNo);
        //設置圖片大小
        image.scaleAbsolute(signRect.getWidth(), signRect.getHeight());
        //設置圖片位置
        image.setAbsolutePosition(x, y);
        under.addImage(image);

        //設置不可編輯
        pdfStamper.setFormFlattening(true);
        pdfStamper.close();                    

 

PS：合並多個pdf成一個

        //先刪除之前的all.pdf
        String filePath="all.pdf";
        File file=new File(filePath);
        file.delete();   
        //要合並的所有pdf的路徑
        List<String> fileList;
        //all.pdf保存路徑
        String savepath="all.pdf";
        Document document = null;
        try {
            document = new Document(new PdfReader(fileList.get(0)).getPageSize(1));
            PdfCopy copy = new PdfCopy(document, new FileOutputStream(savepath));
            document.open();
            for (int i = 0; i < fileList.size(); i++) {
                PdfReader reader = new PdfReader(fileList.get(i));
                int n = reader.getNumberOfPages();// 獲得總頁碼
                for (int j = 1; j <= n; j++) {
                    document.newPage();
                    PdfImportedPage page = copy.getImportedPage(reader, j);// 從當前Pdf,獲取第j頁
                    copy.addPage(page);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (DocumentException e) {
            e.printStackTrace();
        } finally {
            if (document != null) {
                document.close();
            }
        }