java典型應(yīng)用徹查1000例第二卷網(wǎng)絡(luò)應(yīng)用開(kāi)發(fā)源碼習(xí)題bookjavavol_2ch

1、第十四章交叉?zhèn)鬏?Intercross Transition)14-1 簡(jiǎn)介14-2 鍵盤輸入 / 交叉?zhèn)鬏敶蛴?4-3 習(xí)題(Exercises)14-1 簡(jiǎn)介前述各章節(jié)均在描述Client端發(fā)送消息、Server端接收消息。本章將探討Server/Client相互發(fā)送與接收的交叉?zhèn)鬏敚↖ntercross Transition)，其中關(guān)鍵問(wèn)題在當(dāng)一個(gè)節(jié)點(diǎn)在發(fā)送消息時(shí)，無(wú)法同時(shí)接收消息。14-2 鍵盤輸入 / 交叉?zhèn)鬏敶蛴erver/Client相互發(fā)送與接收的關(guān)鍵問(wèn)題，在于發(fā)送時(shí)無(wú)法同時(shí)執(zhí)行接收。在本章中使用特殊符號(hào)，將發(fā)送與接收時(shí)段以人工方式分隔；將再于第十九章探討如何以系統(tǒng)功能執(zhí)行自

2、動(dòng)分隔。范例136：設(shè)有文件Server14.java、Client14.java其功能為解釋Server/Client網(wǎng)絡(luò)交叉?zhèn)鬏數(shù)膽?yīng)用。文件Server14.java：01 import .*;02 import java.io.*;03 import java.util.*;04 public class Server14 05 static int port;06 int messagein, flag, i;07 public Server14() 08 try09 ServerSocket SS = new ServerSocket(port);10 System.out.prin

3、tln(Server is created and waiting Client to connect.);范例136：續(xù)111 Socket socket = SS.accept();12 System.out.println(Client IP = +socket.getInetAddress().getHostAddress();13 DataInputStream instream = newDataInputStream(socket.getInputStream();14 DataOutputStream outstream = newDataOutputStream(socket

4、.getOutputStream();15 InputStreamReader isr = new InputStreamReader(System.in);16 BufferedReader br = new BufferedReader(isr);17 System.out.println(Input data on keyboard.);18while(true) 范例136：續(xù)219messagein = instream.readInt();20System.out.print(char)messagein);21if (messagein = 64) 22flag = 1;23Sy

5、stem.out.println( );2425while(flag = 1) 26i = br.read();27outstream.writeInt(i);28if (i = 64) 29flag = 0;303132 33 范例136：續(xù)334 catch(IOException e)35 System.out.println(e.getMessage();36 37 38 public static void main(String args)39 if(args.length 1)40 System.out.println(Usage: java Server14 port);41

6、System.exit(1);42 43 port=Integer.parseInt(args0);44 Server14 ServerStart=new Server14();45 46 范例136：續(xù)4文件Client14.java：47 import java.io.*;48 import .*;49 public class Client14 50 int i, flag, messagein;51 static String iaddr;52 static int port;53 public Client14() 54 try55 Socket socket=new Socket(

7、InetAddress.getByName(iaddr),port);56 DataOutputStream outstream = newDataOutputStream(socket.getOutputStream();57 DataInputStream instream = newDataInputStream(socket.getInputStream(); 范例136：續(xù)558 InputStreamReader isr = new InputStreamReader(System.in);59 BufferedReader br = new BufferedReader(isr)

8、;60 System.out.println(Input data on keyboard.);61while(true) 62i = br.read();63outstream.writeInt(i);64if (i = 64) 65flag = 1;6667while (flag = 1) 68messagein = instream.readInt();69System.out.print(char)messagein);70if (messagein = 64) 71flag = 0;72System.out.println( );737475 76 范例136：續(xù)677 catch(IOException e)78 System.out.println(e.getMessage();79 80 81 public static void main(String args) 82 if (args.length 2)83 System.out.println(USAGE: java Cli