Java使用itextpdf根据模板生成pdf文件

1. 制作pdf模板

使用Adobe Acrobat打开pdf文件，在需要填充文字、或者图片的地方插入表单，如下图

这里只截图了一部分，其他类似

 2. 添加itextpdf依赖

 3. 编写工具类，根据模板，替换文字和图片，生成pdf文件

public static File createPDF(Map data, Map imageMap, String outfile, String templateFile) {
    PdfReader reader = null;
    AcroFields s;
    PdfStamper ps;
    ByteArrayOutputStream bos = null;
    //输出文档路径及名称
    File outFile = new File(outfile);
    try {
        reader = new PdfReader(templateFile);
        bos = new ByteArrayOutputStream();
        ps = new PdfStamper(reader, bos);
        s = ps.getAcroFields();
        // 处理文字
        for (String key : data.keySet()) {
            if (data.get(key) != null) {
                s.setField(key, data.get(key).toString());
            }
        }
        // 处理图片
        for (String key : imageMap.keySet()) {
            String value = imageMap.get(key);
            String imgpath = value;
            int pageNo = s.getFieldPositions(key).get(0).page;
            Rectangle signRect = s.getFieldPositions(key).get(0).position;
            float x = signRect.getLeft();
            float y = signRect.getBottom();
            // 根据路径读取图片
            Image image = Image.getInstance(imgpath);
            // 获取图片页面
            PdfContentByte under = ps.getOverContent(pageNo);
            // 图片大小自适应
            image.scaleToFit(signRect.getWidth(), signRect.getHeight());
            // 设置图片位置，以为我们以左下角为起始点，所以这里x、y加上偏移量，偏移量为计算的居中量
            image.setAbsolutePosition(x + (signRect.getWidth()-image.getScaledWidth())/2, y + (signRect.getHeight()-image.getScaledHeight())/2);
            // 添加图片
            under.addImage(image);
        }
        // 如果为false那么生成的PDF文件还能编辑，一定要设为true
        ps.setFormFlattening(true);
        ps.close();

        //生成pdf路径存放的路径
        OutputStream fos = new FileOutputStream(outfile);
        fos.write(bos.toByteArray());
        fos.flush();
        fos.close();
        bos.close();
    } catch (IOException | documentException e) {
        log.error("读取文件异常");
        e.printStackTrace();
    } finally {
        try {
            bos.close();
            reader.close();
        } catch (IOException e) {
            log.error("关闭流异常");
            e.printStackTrace();
        }
    }
    return outFile;
}

4. 测试，图片可以为网络图片，也可以为本机图片

public static void main(String[] args) {
    String templatePath ="D:"+File.separator+"temp"+File.separator+"ftl"+File.separator+"report.pdf";
    String outPath = "D:"+File.separator+"temp"+File.separator+"report"+File.separator+"test.pdf";
    Map dataMap =  new HashMap<>(10);
    dataMap.put("qymc", "XX市申海机械设备股份有限公司");
    dataMap.put("qyjc","申海机械");
    dataMap.put("qymc1","XX市申海机械设备股份有限公司");
    dataMap.put("qyjc1","申海机械");
    dataMap.put("kkbxjz","330.89万元");
    dataMap.put("ppjz","334.74万元");
    dataMap.put("jzryear","2020");
    dataMap.put("jzrmonth","12");
    dataMap.put("jzrday","31");
    dataMap.put("beginyear","2021");
    dataMap.put("beginmonth","06");
    dataMap.put("beginday","05");
    dataMap.put("endyear","2022");
    dataMap.put("endmonth","06");
    dataMap.put("endday","04");
    dataMap.put("k","0.2290");
    dataMap.put("zhzs","0.2780");
    dataMap.put("q","0.3468");
    dataMap.put("w","0.2775");
    dataMap.put("s","0.2710");
    dataMap.put("pjdx","XX市申海机械设备股份有限公司");
    dataMap.put("kkbxjz1","330.89万元");
    dataMap.put("ppjz1","334.74万元");
    dataMap.put("jzr","2020年12月31日");
    dataMap.put("kkbxjz2","330.89万元");
    dataMap.put("wtf","太原市申海机械设备股份有限公司");
    dataMap.put("pjdx1","申海机械");
    dataMap.put("jzr1","2020年12月31日");
    dataMap.put("bzrq","2021.06.06");
    dataMap.put("zsbh","AP2021_06023");
    dataMap.put("yxq","2022.06.04");
    Map imageMap = new HashMap<>(5);
    imageMap.put("logo","http://192.168.50.250:9000/group3/202111/logo.png");
    imageMap.put("yqsy","D:/temp/yqsy.png");
    imageMap.put("jzwd","D:/temp/jzwd.png");
    imageMap.put("logo1","http://192.168.50.250:9000/group3/202111/logo.png");
    imageMap.put("qrcode","D:/temp/qrcode.png");
    try {
        createPDF(dataMap,imageMap,outPath,templatePath);
    } catch (Exception e) {
        e.printStackTrace();
    }
}