网络编程参考答案苍松教学

1、1、编写一服务器端程序，实现读取客户端发送过来的一组整数，表现为一组数与数之间用空格隔开的字符串。对这组整数进行排序处理后，返回相应的字符串给客户端，如果数据格式不正确，则返回错误信息，以本机作为服务器。public class server public static void main(string args) bufferedreader br = null; string clientstr="" try /创建一个监听的端口serversocket ss = new serversocket(3838);socket s = null; system.out.pr

2、intln("服务器启动.");/接受客户端通信请求，并建立专用通信端口 s = ss.accept();system.out.println("有客户端发送请求");send send = new send(s);thread t1 = new thread(send);t1.start(); while(true) /获取客户端通信的信息 br = new bufferedreader(new inputstreamreader(s.getinputstream(); clientstr = br.readline(); system.out.pri

3、ntln("客户端："+clientstr); catch (ioexception e) e.printstacktrace(); public class client public static void main(string args) bufferedreader br = null; string clientstr=""try /建立通信端口，并向服务器端发送通信请求socket s = new socket("127.0.0.1",3838); system.out.println("与服务器端建立连接&q

4、uot;); send send = new send(s);thread t1 = new thread(send);t1.start(); while(true) /获取客户端通信的信息 br = new bufferedreader(new inputstreamreader(s.getinputstream(); clientstr = br.readline(); system.out.println("服务器端说："+clientstr); catch (unknownhostexception e) / todo auto-generated catch bl

5、ocke.printstacktrace(); catch (ioexception e) / todo auto-generated catch blocke.printstacktrace();public class send implements runnablesocket s ;scanner in = new scanner(system.in);bufferedreader br = new bufferedreader(new inputstreamreader(system.in);public send(socket s)this.s = s;public void ru

6、n() / todo auto-generated method stubprintwriter out = null;try while(true)out = new printwriter(new outputstreamwriter(s.getoutputstream(),true);string str = in.next();/br.readline(); out.println(str); catch (exception e) / todo auto-generated catch blocke.printstacktrace();finallyout.close();4、编写一

7、个简单的socket通讯程序： 1）、客户机程序，从控制台输入字符串，发送到服务器端，并将服务器返回的信息显示出来。2)、服务器端程序，从客户机接收数据并打印，同时将从标准输入获取的信息发送给客户机3）、满足一个服务器可以服务多个客户实现效果如图：图1：服务器端效果：图2：客户器端效果：public class server static list<socket> l = new arraylist<socket>();public static void main(string args) try serversocket so =new serversocket(4

8、001);system.out.println("服务器启动.");while(true)socket s = so.accept();system.out.println(s.getinetaddress()+"发送请求");l.add(s);one o = new one();thread t = new thread(o);t.start(); catch (ioexception e) / todo auto-generated catch blocke.printstacktrace();public class one implements

9、runnable public void run() socket s = server.l.get(server.l.size() - 1);string str = ""sendall sendall = new sendall();thread t1 = new thread(sendall);t1.start();try while (true) bufferedreader br = new bufferedreader(new inputstreamreader(s.getinputstream();str = br.readline();system.out.

10、println("客户端" + s.getinetaddress() + "说：" + str); catch (ioexception e) / todo auto-generated catch blocksystem.out.println(s.getinetaddress() + "用户下线");server.l.remove(s);public class sendall implements runnablescanner in = new scanner(system.in);bufferedreader br = ne

11、w bufferedreader(new inputstreamreader(system.in);public void run()printwriter out = null;try while(true)string str =br.readline();for(socket s:server.l)out = new printwriter(new outputstreamwriter(s.getoutputstream(),true); out.println(str); catch (exception e) / todo auto-generated catch blocke.pr

12、intstacktrace();finallyout.close();public class client public static void main(string args) bufferedreader br = null; string clientstr=""try /建立通信端口，并向服务器端发送通信请求socket s = new socket("127.0.0.1",4001); system.out.println("与服务器端建立连接"); send send = new send(s);thread t1 =

13、 new thread(send);t1.start(); while(true) /获取客户端通信的信息 br = new bufferedreader(new inputstreamreader(s.getinputstream(); clientstr = br.readline(); system.out.println("服务器端说："+clientstr); catch (unknownhostexception e) / todo auto-generated catch blocke.printstacktrace(); catch (ioexception

14、 e) / todo auto-generated catch blocke.printstacktrace();public class send implements runnablesocket s ;scanner in = new scanner(system.in);bufferedreader br = new bufferedreader(new inputstreamreader(system.in);public send(socket s)this.s = s;public void run() / todo auto-generated method stubprintwriter out = null;try whi