java实现云端打印

        目前市面上的云端打印集成到打印机，需要生产商提供打印服务，价格成本较高。为了适配目前客户店里常用的小票打印机，用java实现云端控制打印。主要有两部分组成，客户端和服务器端

用户客户端

 JEditorPane渲染html，

JEditorPane可以根据url渲染html，JEditorPane对象可以获取Printable接口对象。继而实现用java打印html的目的。

  Printable printable = editorPane.getPrintable(null, null);

 下面是打印的完整代码 

public class PrintHelper {private static final Logger logger = LoggerFactory.getLogger(PrintHelper.class);public static boolean isSerial(String serialNo) {return StringUtil.isAlphaOrDigital(serialNo) && serialNo.length() == 16;}/*** 查找打印机** @param flavor* @param attrs* @return*/private static PrintService getPrintService(DocFlavor flavor, PrintRequestAttributeSet attrs) throws Exception {String serverName = System.getProperty("PRINT.SERVER.NAME");if (StringUtil.isEmpty(serverName)) {throw new Exception("请配置打印机名称。");}PrintService services[] = PrintServiceLookup.lookupPrintServices(flavor, attrs);if (services.length == 0) {throw new Exception("未查找到任何打印服务。");}logger.info("search service list...");PrintService service = null;for (int i = 0; i < services.length; i++) {String printerName=services[i].getName();logger.info("{})service name : {}: ", i, printerName);if (printerName.contains(serverName)) {service = services[i];logger.info("find the right printer:{}", printerName);break;}}if (StringUtil.isEmpty(serverName)) {throw new Exception("请检查配置的打印机名称是否正确。");}return service;}/*** 根据 url 打印** @param url* @return* @throws IOException*/public static Result printHtml(String url) throws Exception {if (StringUtil.isEmpty(url)) return new Result(false, "url can't be null");logger.info("print url:{}",url);JEditorPane editorPane = new JEditorPane();editorPane.setEditable(false);editorPane.setSize(200, 400);editorPane.setPage(url);Printable printable = editorPane.getPrintable(null, null);return doPrint(printable);}public static Result doPrint(Printable printable) throws Exception {DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;PrintRequestAttributeSet attrs = new HashPrintRequestAttributeSet();DocAttributeSet dAttrs = new HashDocAttributeSet();MediaPrintableArea area = new MediaPrintableArea(0, 0, 150, 150, MediaPrintableArea.MM);dAttrs.add(area);attrs.add(area);PrinterResolution printerResolution = new PrinterResolution(200, 200, PrinterResolution.DPI);dAttrs.add(printerResolution);Doc doc = new SimpleDoc(printable, flavor, dAttrs);PrintService service = getPrintService(flavor, null);if (service == null) {logger.error("can't find printer");return new Result(false, "can't find printer");}DocPrintJob job = service.createPrintJob();try {job.print(doc, attrs); // 进行每一页的具体打印操作} catch (PrintException pe) {pe.printStackTrace();}return new Result(true,"打印成功。");}/*** 根据文件流打印** @param fileName* @return* @throws PrintException* @throws IOException* @sample String fileName = "D:\\test.txt";*/public static Result doPrint(String fileName) throws Exception {DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE;PrintRequestAttributeSet attrs = new HashPrintRequestAttributeSet();PrintService service = getPrintService(flavor, attrs);if (service == null) {logger.error("can't find printer");return new Result(false, "can't find printer");}DocPrintJob job = service.createPrintJob();DocAttributeSet dAttrs = new HashDocAttributeSet();MediaPrintableArea area = new MediaPrintableArea(0, 0, 10, 10, MediaPrintableArea.MM);dAttrs.add(area);FileInputStream stream = null;try {stream = new FileInputStream(fileName);Doc doc = new SimpleDoc(stream, flavor, dAttrs);job.print(doc, attrs);} finally {stream.close();}return new Result();}public static void main(String[]args) throws Exception {String url="http://www.baidu.com";PrintHelper.printHtml(url);}}
 

 

 
 这样通过服务器给客户端发送打印命令即可，例如通过activeMQ客户端和服务器建立长连接。 

 

 
                        

                        

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