根据pdf模板导入数据生成pdf并直接下载-java版

1、导入依赖

<!--PDF-->
        <!-- https://mvnrepository.com/artifact/com.itextpdf/itextpdf -->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.13</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.itextpdf/itext-asian -->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-asian</artifactId>
            <version>5.2.0</version>
        </dependency>
     

2、生成pdf

    public void createPDF(JcOrder jcOrder, HttpServletResponse response) throws IOException {
    
    
        try {
    
    
            final BaseFont font = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            //模板路径，本机位置用这个PdfReader 
                PdfReader reader= new PdfReader("D:\\sd.pdf");
                //模板路径，放到项目里用这个ClassPathResource 
//            ClassPathResource classPathResource = new ClassPathResource("pdfTemplate/sd.pdf");
//            InputStream inputStream = classPathResource.getInputStream();
//            PdfReader reader = new PdfReader(inputStream);
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            PdfReader pdfReader = null;
            PdfStamper ps = new PdfStamper(reader, bos);
            //提取表单
            AcroFields s = ps.getAcroFields();
            //填写定义的字段属性
            s.setFieldProperty("name", "textfont", font, null);
            s.setFieldProperty("age", "textfont", font, null);
            s.setFieldProperty("time", "textfont", font, null);
            s.setFieldProperty("type", "textfont", font, null);
            s.setFieldProperty("rc", "textfont", font, null);
            s.setFieldProperty("rd", "textfont", font, null);
            s.setFieldProperty("rs", "textfont", font, null);
            s.setFieldProperty("re", "textfont", font, null);
            s.setField("name", "lj");
            s.setField("age", "18");
            s.setField("time", "2021-15-09 14:50:00");
            s.setField("type", "类型");
            s.setField("rc", "阴性");
            s.setField("rd", "阴性");
            s.setField("rs", "阴性");
            s.setField("re", "阴性");
            ps.setFormFlattening(true);
            ps.close();
            pdfReader = new PdfReader(bos.toByteArray());

            Document document = new Document();

            //设置请求返回类型
            response.setHeader("Content-Disposition", "attachment; filename=测试.pdf");
            response.setContentLength(bos.size());
            OutputStream outputStream = response.getOutputStream();
            PdfCopy copy = new PdfCopy(document, outputStream);
            document.open();
            //如果是list集合需要加一下这个，相当于多一页
//            document.newPage();
            copy.addDocument(pdfReader);
            copy.close();
            document.close();
        } catch (Exception e) {
    
    
            e.printStackTrace();
            log.error("=======导出pdf====" + e.getMessage());
        }


    }