java UDP打印

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：

# 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);  
#         }  
#     }  
# }