网络编程实验报告.doc

实验名称：一个简单的客户/服务器程序实验目的：1、熟悉Eclipse编程环境。2、了解TCP与UDP协议，以及它们之间的区别。3、了解客户/服务器模型原理。 4、熟悉Socket编程原理，掌握简单的套接字编程。实验环境：硬件：PC机(两台)、网卡、已经设定好的以太网环境软件：Eclipse 编程语言：java实验内容：编写用TCP协议实现的Client端和Server端程序并调试通过。程序分两部分：客户程序和服务器程序。工作过程是： 服务器首先启动，它创建套接字之后等待客户的连接；客户启动后创建套接字，然后和服务器建立连接；建立连接后，客户接收键盘输入，然后将数据发送到服务器，服务器收到到数据后，将接收到的字符在屏幕上显示出来。或者服务器接收键盘输入，然后将数据发送到客户机，客户机收到数据后，将接收到的字符在屏幕上显示出来。 程序流程：源程序服务器端：usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Net;usingSystem.Net.Sockets;/添加命名空间usingSystem.Threading;/添加命名空间namespaceWFAsynSocketpublicpartialclassForm1:FormThreadLisThread;SocketLisSocket;SocketnewSocket;EndPointpoint;stringstrmes=String.Empty;intport=8000;/定义侦听端口号publicForm1()InitializeComponent();privatevoidbtn_Listen_Click(objectsender,EventArgse)LisThread=newThread(newThreadStart(BeginListern);/开线程执行BeginListern方法LisThread.Start();/线程开始执行publicIPAddressGetIP()/*获取本地服务器的ip地址*/IPHostEntryiep=Dns.GetHostEntry(Dns.GetHostName();IPAddressip=iep.AddressList0;returnip;publicvoidBeginListern()LisSocket=newSocket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);/实例化SocketIPAddressServerIp=GetIP();/*获取本地服务器的ip地址*/IPEndPointiep=newIPEndPoint(ServerIp,port);LisSocket.Bind(iep);/*将Socket绑定ip*/toolStripStatusLabel1.Text=iep.ToString()+正在监听;LisSocket.Listen(50);/Socket开始监听newSocket=LisSocket.Accept();/获取连接请求的Socket/*接收客户端Socket所发的信息*/while(true)trybytebyteMessage=newbyte100;newSocket.Receive(byteMessage);/接收信息MessageBox.Show(Encoding.Default.GetString(byteMessage);Control.CheckForIllegalCrossThreadCalls=false;point=newSocket.RemoteEndPoint;/获取客户端的Socket的相关信息IPEndPointIPpoint=(IPEndPoint)point;strmes+=IPpoint.Address.ToString()+DateTime.Now.ToString()+说+Encoding.Default.GetString(byteMessage).Trim(newchar0)+rn;this.richTextBox1.Text=strmes;catch(SocketExceptionex)toolStripStatusLabel1.Text+=ex.ToString();privatevoidbtn_Cancel_Click(objectsender,EventArgse)tryLisSocket.Close();/关闭SocketLisThread.Abort();/线程停止LisThread=null;catch(Exceptionex)MessageBox.Show(ex.Message);finallyApplication.Exit();privatevoidbtn_Send_Click(objectsender,EventArgse)bytebyteData=Encoding.Default.GetBytes(this.richTextBox2.Text);newSocket.Send(byteData);/发送信息即由服务器往客户端上发信息客户端：usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Threading;usingSystem.Net.Sockets;usingSystem.Net;namespaceWFAsynSoketClientpublicpartialclassForm1:FormpublicstaticSocketClientSocket;publicForm1()InitializeComponent();/*往服务器上发送信息按钮事件*/privatevoidbtn_Send_Click(objectsender,EventArgse)if(ClientSocket.Connected)/判断Socket是否已连接byteSendMessage=newbyte100;SendMessage=Encoding.ASCII.GetBytes(this.richTextBox1.Text);ClientSocket.Send(SendMessage);/从数据中的指示位置开始将数据发送到连接的Socket。MessageBox.Show(Encoding.Default.GetString(SendMessage)+发送成功!);elseMessageBox.Show(未建立连接！);/*退出按钮*/privatevoidbtn_Cancel_Click(objectsender,EventArgse)ClientSocket.Shutdown(SocketShutdown.Both);/发送完成之后停止SocketClientSocket.Close();/发送完成之后关闭SocketApplication.Exit();/*接收来自服务器上的信息*/publicvoidtargett()this.toolStripStatusLabel1.Text=已经建立连接准备接受数据;while(true)bytebytes=newbyte100;intrev=ClientSocket.Receive(bytes,bytes.Length,0);/将数据从连接的Socket接收到接收缓冲区的特定位置。if(rev=0)break;stringstrev=System.Text.Encoding.Default.GetString(bytes);this.textBox1.AppendText(服务器对客户端说:+strev+rn);privatevoidForm1_Load(objectsender,EventArgse)/*为客户端Socket建立连接到服务器*/privatevoidbutton1_Click(objectsender,EventArgse)ClientSocket=newSocket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);stringip=6;/服务器ipIPAddressipa=IPAddress.Parse(ip);IPEndPointiep=newIPEndPoint(ipa,8000);this.toolStripStatusLabel1.Text=已经建立连接.;Control.CheckForIllegalCrossThreadCalls=false;tryClientSocket.Connect(iep);/连接到服务器Threadthread=newThread(newThreadStart(targett);thread.Start();catch(Exceptio