java批量生成条码pdf模板

本文用到的第三方工具冰蓝的Spire.PDF

1.首先导入依赖

我这里用的是项目路径下的jar包，如果可正常下载依赖 去掉框中的两行

2.使用流程

1.构建pdf文档模板

@GetMapping(value = "/sample/{id}")
public void sample(Model model, HttpServletRequest request, @PathVariable("id") String id,
HttpServletResponse response) {
        JianguanSample sample= sampleMapper.selectJianguanSampleById(Long.valueOf(id));

        String saveDir = "D:\\tpl模版\\cy\\"; //文件保存的路径

        File file_saveDir = new File(saveDir);
        if (!file_saveDir.exists()) {
            file_saveDir.mkdirs();
        }

        //创建PdfDocument对象
        PdfDocument pdf = new PdfDocument();
				
        //这里因为用的免费版，pdf第一页会有水印，移除第一页去除水印
        pdf.getPages().add();
        PdfPageBase page = pdf.getPages().add();
        pdf.getPages().removeAt(0);

        //初始化y变量
        double y = 15;

        //初始化x变量
        double x=0;

        int sampleNum=sample.getSampleNum();

        JianguanSampleCode code=new JianguanSampleCode();

        String date=DateUtils.dateTime();
        String maxCode=codeMapper.selectMaxSampleCode(date);

        List<JianguanSampleCode> codeList=new ArrayList<>();
        for (int i = 0; i < sampleNum; i++) {

            //创建唯一编码
           if (maxCode==null){  
               maxCode=date + String.format("%05d", 1);
           }else {
               Integer maxNum = Integer.parseInt(maxCode.substring(8));
               maxNum++;
               maxCode=date+String.format("%05d", maxNum);
           }

            //生成唯一编码
            codeList.add(generateCode(sample,maxCode,i));
 
           if (i+1==sampleNum){  //每次生成一个定位下一个条码位置
               for (int j = 1; j <=codeList.size() ; j++) {
                   y=paint(codeList.get(j-1).getSampleCode(),page,x,y);
                   if(j%11==0){ //每隔11条码换列
                       x=x+180;
                       y=15;
                   }
                   if (j%33==0){ //每张超33个条码换纸
                       page= pdf.getPages().add();
                       x=0;
                       y=15;
                   }
               }
           }
        }

        String savePdfPath = saveDir + "/" + id+sample.getSiteId()  + ".pdf";
        pdf.saveToFile(savePdfPath);
        FileUtils.inline1(savePdfPath, id, "pdf", request, response); //预览文件的方法
}

2.创建唯一的编码

private JianguanSampleCode generateCode(JianguanSample sample,String codeNum,int i){
        //查询该场所此任务是否已生成编号
        JianguanSampleCode code=new JianguanSampleCode();
        code.setSiteId(sample.getSiteId());
        code.setTaskId(sample.getId());
        List<JianguanSampleCode> codeList= codeMapper.selectJianguanSampleCodeList(code);
		
        if(codeList.size()<sample.getSampleNum()){
            code.setSampleCode(codeNum);
            code.setCreateTime(new Date());
            codeMapper.insert(code);
            return code;
        }else {
            return codeList.get(i);
        }
    }

3.画条码

private double paint(String maxCode,PdfPageBase page,double x,double y){
    PdfCodabarBarcode codebar= new PdfCodabarBarcode(maxCode);
    //设置条码的样式
    codebar.setBarcodeToTextGapHeight(1f);
    codebar.setBarHeight(50f);
    codebar.setEnableCheckDigit(true);
    codebar.setShowCheckDigit(true);
    codebar.setTextDisplayLocation(TextLocation.Bottom);
    PdfRGBColor black = new PdfRGBColor(Color.black);
    codebar.setTextColor(black);
    Point2D.Float point = new Point2D.Float();
    point.setLocation(x,y); //条码的位置
    codebar.draw(page,point);
    y = codebar.getBounds().getY()+ codebar.getBounds().getHeight() + 5;
    return y;
}

附***预览文件的工具类

public static void inline1(String savePath, String fileName,String ext,
                          HttpServletRequest request, HttpServletResponse response) {
    OutputStream toClient = null;
    try {
        //String path = savePath + "/" + fileName + "." + ext;
        File file = new File(savePath);
        if (!file.exists()) {
            // 不存在
            request.setAttribute("name", fileName);// 返回预览文件不存在
            throw new Exception("模板未找到");
        }
        if (!inOnLineExt(ext)) {
            response.setContentType("application/octet-stream");
        }
        // 根据不同浏览器 设置response的Header
        String userAgent = request.getHeader("User-Agent").toLowerCase();

        if (userAgent.indexOf("msie") > 0 ||(userAgent.indexOf("gecko")>0 && userAgent.indexOf("rv:11")>0)) {
            // ie浏览器
            // System.out.println("ie浏览器");
            response.addHeader("Content-Disposition", "inline;filename="
                    + URLEncoder.encode(fileName+"."+ext, "utf-8"));

        } else {
            response.addHeader("Content-Disposition", "inline;filename="
                    + new String((fileName+"."+ext).getBytes("utf-8"), "ISO8859-1"));
        }

        response.addHeader("Content-Length", "" + file.length());

        response.setContentType("application/"+ext+";charset=UTF-8");

        // 以流的形式预览文件
        InputStream fis = new BufferedInputStream(new FileInputStream(savePath));
        byte[] buffer = new byte[fis.available()];
        fis.read(buffer);
        fis.close();
        toClient = new BufferedOutputStream(response.getOutputStream());
        toClient.write(buffer);
        toClient.flush();
    } catch (Exception e) {
        e.printStackTrace();
        response.reset();
    } finally {
        if (toClient != null) {
            try {
                toClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

4.前端绑定事件对应打印方法并预览

效果图如下：

另外免费版的spire.pdf限制了10页（如果是打印或转换页码不多的文件还是够用的）