jdk调用UsbPos打印机，实现指令打印

package com.haidilao.hipos.pc.utils; import java.io.ByteArrayOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.Random; import javax.print.Doc; import javax.print.DocFlavor; import javax.print.DocPrintJob; import javax.print.PrintService; import javax.print.SimpleDoc; /** * 用于网络打印机 ip模式 * * @author Xue Chen * */ public class HiPrinterJobUsb extends PrinterJob { private String printerName; private OutputStream out = null; private void setPrinter(String printerName) throws Exception { this.printerName = printerName; } public void close() { try { } catch (Exception e) { e.printStackTrace(); } finally { System.out.println("closed!"); } } private HiPrinterJobUsb() { } /** * * @throws Exception * @author Xue Chen Time ：2013年3月14日 下午12:47:27 */ public boolean printHTML() throws Exception { try { out = getOutputStream(); //这里实现你自己的打印任务，将打印数据写到out里 super.printHTML(out); printDoc(); return true; } catch (Exception e) { e.printStackTrace(); return false; } finally { close(); } } private OutputStream getOutputStream() { OutputStream buff = new java.io.ByteArrayOutputStream(); return buff; } /** *实现打印 */ private void printDoc() throws Exception { PrintService[] ps = java.awt.print.PrinterJob.lookupPrintServices(); boolean foundUsbSet=false; for (PrintService p : ps) { if (printerName.equalsIgnoreCase(p.getName())) { foundUsbSet=true; DocPrintJob job = p.createPrintJob(); byte[] data = ((ByteArrayOutputStream) out).toByteArray(); InputStream in = new java.io.ByteArrayInputStream(data); // 这个是最关键的地方，一般的pos打印机都支持 DocFlavor.INPUT_STREAM.AUTOSENSE Doc doc = new SimpleDoc(in, DocFlavor.INPUT_STREAM.AUTOSENSE, null); job.print(doc, null); return; } } if(foundUsbSet==false){ System.err.println("Can not find the printer "+this.printerName); } } }