先把代码贴出来： /**tcps.java**/
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import java.io.*; import java.net.*; import java.util.Scanner; public class tcps { public static void main(String[] args) { if(args.length != 1) { System.out.println("usage: tcps <port>"); System.exit(0); } server(args[0]); } public static void server(String port) { int Port = Integer.parseInt(port); try{ ServerSocket ss=new ServerSocket(Port); Socket s=ss.accept(); //OutputStream os=s.getOutputStream(); PrintWriter pw=new PrintWriter(s.getOutputStream(),true); //InputStream is=s.getInputStream(); Scanner sc=new Scanner(s.getInputStream()); //byte[] buf=new byte[100]; //os.write("welcome".getBytes()); pw.println("welcome tcp client"); //int len=is.read(buf); //System.out.println(new String(buf,0,len)); String mesg = sc.nextLine(); System.out.println(mesg); //is.close(); //os.close(); s.close(); ss.close(); } catch(Exception ex) { ex.printStackTrace(); } } } |
/**tcpc.java**/
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import java.io.*; import java.net.*; import java.util.Scanner; public class tcpc { public static void main(String[] args) { if(args.length != 2) { System.out.println("usage: udpc <serverIP> <port>"); System.exit(1); } client(args[0],args[1]); } public static void client(String addr,String port) { String SrvAddr=addr; int Port=Integer.parseInt(port); try{ Socket s=new Socket(InetAddress.getByName(SrvAddr),Port); //OutputStream os=s.getOutputStream(); PrintWriter pw=new PrintWriter(s.getOutputStream(),true); //InputStream is=s.getInputStream(); Scanner sc=new Scanner(s.getInputStream()); byte[] buf=new byte[100]; //os.write("this is client".getBytes()); pw.println("this is tcp client"); //int len=is.read(buf); //System.out.println(new String(buf,0,len)); System.out.println(sc.nextLine()); //is.close(); //os.close(); s.close(); } catch(Exception ex) { ex.printStackTrace(); } } } |
/**udps.java**/
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import java.io.*; import java.net.*; public class udps { public static void main(String[] args) { if(args.length != 1) { System.out.println("usage: udps <port>"); System.exit(0); } server(args[0]); } public static void server(String port) { int Port=Integer.parseInt(port); try { DatagramSocket serv=new DatagramSocket(Port); byte[] buf=new byte[100]; DatagramPacket dp=new DatagramPacket(buf,100); serv.receive(dp); System.out.println(new String(dp.getData(),0,dp.getLength())); String str="welcome udp client"; DatagramPacket dps=new DatagramPacket(str.getBytes(),str.length(), dp.getAddress(),dp.getPort()); serv.send(dps); serv.close(); } catch(Exception ex) { ex.printStackTrace(); } } } |
/**udpc.java**/ [crayon-6a358e18b728b5540263 […]