java UDP打印
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2022-04-08 23:18:39
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采用UDP的通讯方式,调用java自带的awt打印接口
服务器端代码
Server:
打印线程代码
PrintThread
打印的实际代码
Print:
客户端代码
Client:
服务器端代码
Server:
# import java.io.IOException; # import java.net.DatagramPacket; # import java.net.DatagramSocket; # import java.net.SocketException; # # public class Server # { # private DatagramSocket server; # # private DatagramPacket packet; # # private byte[] b; # # public Server() # { # startServer(); # } # # private void startServer() # { # try # { # server = new DatagramSocket(12345); # # while(true) # { # b = new byte[1024]; # # packet = new DatagramPacket(b, b.length); # # server.receive(packet); # # new Thread(new PrintThread(packet, b)).start(); # } # # }catch(SocketException e) # { # e.printStackTrace(); # }catch(IOException e) # { # e.printStackTrace(); # }finally # { # server.close(); # } # } # # public static void main(String[] args) # { # new Server(); # } # }
打印线程代码
PrintThread
# import java.net.DatagramPacket; # # public class PrintThread implements Runnable # { # private DatagramPacket packet; # # private byte[] b; # # public PrintThread(DatagramPacket packet, byte[] b) # { # this.packet = packet; # this.b = b; # } # # public void run() # { # int i = 0; # # i = packet.getLength(); # # if(i>0) # { # String str = new String(b, 0, i); # new Print().doPrint(str); # } # } # }
打印的实际代码
Print:
# import java.awt.Color; # import java.awt.Font; # import java.awt.Graphics; # import java.awt.Graphics2D; # import java.awt.Paint; # import java.awt.print.PageFormat; # import java.awt.print.Printable; # import java.awt.print.PrinterException; # # import javax.print.Doc; # import javax.print.DocFlavor; # import javax.print.DocPrintJob; # import javax.print.PrintException; # import javax.print.PrintService; # import javax.print.PrintServiceLookup; # import javax.print.SimpleDoc; # import javax.print.attribute.DocAttributeSet; # import javax.print.attribute.HashDocAttributeSet; # import javax.print.attribute.standard.MediaSizeName; # import javax.swing.JOptionPane; # # public class Print implements Printable { # # private String content = null; # # public void setContent(String content) { # this.content = content; # } # # public void doPrint(String content) { # if (null == content || content.equals("")) { # Object message = new String("Sorry, Printer Job is Empty, Print Cancelled!"); # String title = "Empty"; # JOptionPane.showConfirmDialog(null, message, title, JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE); # } else { # setContent(content); # PrintService printService = PrintServiceLookup.lookupDefaultPrintService(); # DocPrintJob docPrintJob = printService.createPrintJob(); # DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE; # DocAttributeSet attributes = new HashDocAttributeSet(); # attributes.add(MediaSizeName.A); # Doc doc = new SimpleDoc(this, flavor, attributes); # try { # docPrintJob.print(doc, null); # } catch (PrintException e) { # // TODO Auto-generated catch block # e.printStackTrace(); # } # } # } # # public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) # throws PrinterException { # // TODO Auto-generated method stub # if (pageIndex >= 1) { # return Printable.NO_SUCH_PAGE; # } else { # Graphics2D graphics2D = (Graphics2D) graphics; # graphics2D.translate(pageFormat.getImageableX(), pageFormat.getImageableY()); # Paint paint = Color.black; # graphics2D.setPaint(paint); # Font font = new Font("宋体", Font.PLAIN, 10); # graphics2D.setFont(font); # float x = 0.0f; # float y = font.getSize2D(); # # String[] array = content.split("@"); # String room_idx = array[0]; # String content = array[1]; # String price = array[2]; # String unit = array[3]; # String time = array[4]; # # price = price + "元/" + unit; # # graphics2D.drawString("网络视频酒店信息服务项目", x, 1*y); # graphics2D.drawString("--------------------------------", x, 2*y); # graphics2D.drawString("房间号: " + room_idx, x, 3*y); # graphics2D.drawString("消费内容: " + content, x, 4*y); # graphics2D.drawString("消费金额: " + price, x, 5*y); # graphics2D.drawString("消费时间: " + time, x, 6*y); # } # return Printable.PAGE_EXISTS; # } # # }
客户端代码
Client:
# import java.io.IOException; # import java.net.DatagramPacket; # import java.net.DatagramSocket; # import java.net.InetSocketAddress; # import java.net.SocketException; # import java.text.SimpleDateFormat; # import java.util.Date; # # public class Client # { # private DatagramSocket client; # # private DatagramPacket packet; # # private InetSocketAddress address; # # private byte[] b; # # public void doPrint(String str) # { # try # { # client = new DatagramSocket(); # # address = new InetSocketAddress("127.0.0.1", 12345); # # SimpleDateFormat spl = new SimpleDateFormat("yy-MM-dd HH:mm:ss"); # # str = str + "@" + spl.format(new Date()); # # b = str.getBytes(); # # packet = new DatagramPacket(b, b.length, address); # # client.send(packet); # } catch (SocketException e) # { # e.printStackTrace(); # } catch (IOException e) # { # e.printStackTrace(); # } finally # { # client.close(); # } # } # # public static void main(String[] args) # { # for(int i = 0; i<5; i++) # { # int a = i; # String str = a + "@" + (a+1) + "@" + (a+2) + "@天"; # new Client().doPrint(str); # } # } # }