java中使用pdfBox打印pdf；java web打印pdf；静默打印；jar程序打包成exe文件；exe4j的使用

忘是亡心i 2022-11-17 05:18 115阅读 0赞

## java编写打印控件 ##

> web打印一直是个棘手的问题，市面上的第三方打印插件也是贵的离谱，这里给出一个可行的解决方案。
> 
> SpringBoot项目的web服务，实现的功能：
> 
> 1.  获取电脑可用的打印机列表
> 2.  设置使用的打印机
> 3.  实现静默打印，打印时可以设置｛**打印份数**、**打印方向（横向、纵向）**、**双面 or 单面打印**｝
> 
> 需注意的操作：
> 
>  *  这是java web项目，所以需要打印的客户端电脑需要配置jdk、tomcat、以及设置服务自启（可自行百度，简单）。
>  *  另一个办法是将jar程序使用exe4j转成可执行文件（下面有简单介绍）。

@RequestMapping("/print")
    public R print(@RequestParam(required = false) Map<String, Object> params, HttpServletRequest request) throws FileNotFoundException 
    此方法接收的参数包括：{"pdf":"pdf的base64位字符串(String)[必要的]","copies":"打印份数(int)[非必要]","duplex":"是否双面打印(boolean)[非必要]"}

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70][]

<dependency>
                <groupId>org.apache.pdfbox</groupId>
                <artifactId>pdfbox</artifactId>
                <version>2.0.23</version>
            </dependency>

@CrossOrigin
    @RestController
    public class PrintController {
    
        /**
         * @Description: 使用打印机的名称。可以存在数据库里做持久化
         */
        private static String printName = "Microsoft Print to PDF";
    
        /**
         * @Description: 获取打印机列表
         * @Param: []
         * @Return: com.wq.print.util.R
         */
        @RequestMapping("/list")
        public R list() {
            ArrayList<String> list = new ArrayList<>();
            // 遍历所有打印机的名称
            for (PrintService ps : PrinterJob.lookupPrintServices()) {
                list.add(ps.getName());
            }
            if (list.size() != 0) {
                return R.ok("获取打印机列表成功").put("list", list);
            }
            return R.error("暂无可用打印机，请检查系统打印机设置");
        }
    
        /**
         * @Description: 设置使用的打印机
         * @Param:
         * @Return: com.wq.print.util.R
         */
        @PostMapping("/setPrint")
        public R setPrint(@RequestParam("printName") String printName) {
            PrintController.printName = printName;
            return R.ok("打印机设置成功");
        }
    
        /**
         * @Description: 打印服务
         * @Param:
         * @Return: com.wq.print.util.R
         */
        @RequestMapping("/print")
        public R print(@RequestParam(required = false) Map<String, Object> params, HttpServletRequest request) throws FileNotFoundException {
            if ("GET".equals(request.getMethod())) {
                return R.error("GET请求方式不被支持，只支持POST请求方式");
            }
            Object pdfBase64Str = params.get("pdf");
            if (StringUtils.isEmpty(pdfBase64Str)) {
                return R.error("pdf的Base64字符串有误或为空，请检查");
            }
            //将前端传来的pdfbase64数组转成字节数组
            byte[] pdfByte = PrintController.base64ToFileByte(pdfBase64Str.toString());
            //打印份数
            int copies = params.get("copies") == null ? 1 : Integer.parseInt(params.get("copies").toString());
            //是否双面打印
            boolean duplex = params.get("duplex") != null && Boolean.parseBoolean(params.get("duplex").toString());
            Boolean print = print(pdfByte, PrintController.printName, copies, duplex);
            if (print) {
                return R.ok("打印完成");
            } else {
                return R.error("打印失败");
            }
        }
    
        /**
         * @Description: 打印方法
         * pdfByte:需要打印的pdf字节数组
         * printName：打印机名称
         * copies：打印份数
         * duplex：是否双面打印
         */
        private Boolean print(byte[] pdfByte, String printName, int copies, boolean duplex) {
            try {
                //加载pdf文件对象
                PDDocument document = PDDocument.load(pdfByte);
                //创建打印任务
                PrinterJob job = PrinterJob.getPrinterJob();
                // 遍历所有打印机的名称
                for (PrintService ps : PrinterJob.lookupPrintServices()) {
                    String psName = ps.getName();
                    // 选用指定打印机
                    if (psName.equals(printName) || psName.contains(printName)) {
                        job.setPrintService(ps);
                        break;
                    }
                }
                job.setPageable(new PDFPageable(document));
                Paper paper = new Paper();
                // 设置打印纸张大小
                paper.setSize(598, 842);
                // 设置打印位置 坐标
                paper.setImageableArea(0, 0, paper.getWidth(), paper.getHeight());
                PageFormat pageFormat = new PageFormat();
                pageFormat.setPaper(paper);
    //            pageFormat.setOrientation(PageFormat.REVERSE_LANDSCAPE);//横向 从右向左
    //            pageFormat.setOrientation(PageFormat.PORTRAIT);//横向 从左向右
                pageFormat.setOrientation(PageFormat.PORTRAIT);//纵向
                Book book = new Book();
                book.append(new PDFPrintable(document, Scaling.ACTUAL_SIZE), pageFormat, 1);
                job.setPageable(book);
                //打印份数
                job.setCopies(copies);
                if (duplex) {//双面打印
                    PrintRequestAttributeSet printSet = new HashPrintRequestAttributeSet();
                    printSet.add(Sides.DUPLEX);
                    //执行打印操作
                    job.print(printSet);
                } else {//单面打印
                    job.print();
                }
                return true;
            } catch (Exception e) {
                e.printStackTrace();
                return false;
            }
        }
    
        /**
         * @Description: 文件的base64字符串转字节数组
         */
        public static byte[] base64ToFileByte(String strBase64) {
            return java.util.Base64.getDecoder().decode(strBase64);
        }
    
    }

## 使用exe4j将jar程序转成exe可执行文件 ##

官网下载exe4j：[https://exe4j.apponic.com/][https_exe4j.apponic.com]   。下载后 下一步...下一步.....安装。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 1][]

使用maven的package指令将写好的java程序打成jar包

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 2][]

将此jar包复制到桌面（或者其他好操作的位置）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 3][]

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![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 8][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 9][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 10][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 11][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 12][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 13][]

![20210409153029335.png][]

双击exe文件即可运行。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 14][]

测试：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXFpYW5nOTE1_size_16_color_FFFFFF_t_70 15][]

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[https_exe4j.apponic.com]: https://exe4j.apponic.com/
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[20210409153029335.png]: /images/20221022/b9799664a2bb456c9075a16670524834.png
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