java实验报告网络基础.doc

实验八 网络编程基础1实验目的（1）掌握Socket通信。（2）掌握UDP通信2实验内容实验题1 使用InetAddress类的方法获取/的主机的IP地址；获取本地机的名称和IP地址。运行结果：主要代码：package package1;import .*;public class Ex7_1 /* * param args */public static void main(String args) / TODO Auto-generated method stubtry InetAddress myNet = InetAddress.getByName();System.out.println(myNet.toString();System.out.println(InetAddress.getLocalHost().toString(); catch (UnknownHostException e) / TODO Auto-generated catch blocke.printStackTrace();实验题2 使用URL类下载西北农林科技大学首页/，并统计下载得到网页文件的大小。运行结果：主要代码：public void run() tryint n=0;int sum = 0;jEditorPane1.setText(null);url = new URL(http:/+jTextField1.getText().trim();InputStream in = url.openStream();while(n = in.read(b)!=-1)sum+=n;jEditorPane1.setPage(url);jTextField2.setText(+sum);catch(Exception e1)jTextField1.setText(+e1);private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) / TODO add your handling code here:if(!(thread.isAlive()thread = new Thread(this);trythread.start();catch(Exception e)jTextField1.setText(+url);实验题3 利用Socket类和ServerSocket类编写一个C/S程序，实现C/S通信。客户端向服务器端发送Time命令，服务器端接受到该字符串后将服务器端当前时间返回给客户端；客户端向服务器端发送Exit命令，服务器端向客户端返回“Bye”后退出。基本要求 编写完整程序；两人一组，一个作为服务器端，另一人作为客户端。服务器端和客户端都需要打印出接受到的消息和发出的命令。运行结果：服务器端客户端 主要代码：服务器端：package package3;import java.io.*;import .*;import java.util.Date;public class Server /* * param args */public static void main(String args) / TODO Auto-generated method stubServerSocket server = null;Socket you = null;InputStreamReader in = null;OutputStreamWriter out =null;Date today = new Date();tryserver = new ServerSocket(18949);catch(IOException e)System.out.println(e);trySystem.out.println(等待客户连接);you = server.accept();in = new InputStreamReader(you.getInputStream();out =new OutputStreamWriter(you.getOutputStream();BufferedWriter bout = new BufferedWriter(out);BufferedReader bin = new BufferedReader(in);String temp = null;while(true)System.out.println(等待客户信息 );temp=bin.readLine();if(temp.equals(Exit)System.out.println(收到客户信息 +temp);bout.write(Bye);bout.newLine();bout.flush();break;System.out.println(收到客户信息 +temp);bout.write(today.toString();bout.newLine();bout.flush();server.close();you.close();catch(IOException e1)System.out.println(客户端断开连接 +e1);客户端：package package3;import java.io.*;import .*;public class Client /* * param args */public static void main(String args) / TODO Auto-generated method stubSocket mysocket;InputStreamReader in = null;OutputStreamWriter out =null;trymysocket = new Socket(,18949);in = new InputStreamReader(mysocket.getInputStream();out =new OutputStreamWriter(mysocket.getOutputStream();BufferedWriter bout = new BufferedWriter(out);BufferedReader bin = new BufferedReader(in);while(true)bout.write(Time);System.out.println(Client send : Time);bout.newLine();bout.flush();String temp = null;temp = bin.readLine();System.out.println(From server: +temp);bout.write(Exit);System.out.println(Client send : Exit);bout.newLine();bout.flush();temp = bin.readLine();if(temp.equals(Bye)System.out.println(From server: +temp);break;mysocket.close();catch(Exception e)System.out.println(e);实验题4 编写一数据报通信程序，实现简单的聊天功能。聊天内容输入文本确定清空退出图3.14 聊天程序界面基本要求 两人一组编写完整程序。“聊天内容”和“输入文本”分别为当前聊天的历史信息和当前要传送出去的聊天文本。“确定”、“清空”、“退出”三个按钮分别实现发送当前聊天文本、清空当前聊天文本和退出系统的功能。运行结果：主要代码：public void run()jTextArea1.append(开始接收信息：+n);DatagramPacket pack = null;DatagramSocket mailPack =null;byte data = new byte8192;trypack = new DatagramPacket(data,data.length);mailPack = new DatagramSocket(29249);catch(Exception e)System.out.println(e+n);while(true)if(mailPack = null)break;elsetry mailPack.receive(pack);String message = new String(pack.getData(),0,pack.getLength();if(message.equals(bye)jTextArea1.append(对方已下线 ！+n);break;jTextArea1.append(接收到信息：+message+n); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();private void oKActionPerformed(ActionEvent evt) /System.out.println(oK.actionPerformed, event=+evt);/TODO add your code for oK.actionPerformedString message = jTextField1.getText();byte buffer=message.trim().getBytes();jTextArea1.append(发出的信息：+message+n);tryInetAddress address = InetAddress.getByName();DatagramPacket dataPack = new DatagramPacket(buffer,buffer.length,address,8976);DatagramSocket mailPack = new DatagramSocket();mailPack.send(dataPack);catch(Exception e)private void clearActionPerformed(ActionEvent evt) /System.out.println(clear.actionPerformed, event=+evt);/TODO add your code for clear.actionPerformedjTextField1.setText();private void quitActionPerformed(java.awt.event.ActionEvent evt) / TODO add your handling code here:String message = bye;byte buffer = message.trim().getBytes();jTextArea1.append(您已退出程序！ + n);try InetAddress address = InetAddress.getByName();DatagramPacket dataPack = new DatagramPacket(buffer, buffer.length,address,inportnum);DatagramSocket mailPack = new DatagramSocket();mailPack.send(dataPack); catch (Exception e) 实验题5 客户机之间通过服务器交换数据。提示：为了适应传输各种类型的数据，必须统一客户机的数据格式，为此可以将数据封装在一个对象中，数据传输以对象的形式传输。因此必须定义一个数据封装的类，此类实现Serializable接口。运行结果：将对象写入文本从文本读取打印结果主要代码：package package5;import java.io.Serializable;public class Student implements SerializableString name = null;int age = 0;public Student(String name,int age) = name;this.age = age;public String toString()return(姓名：+name+ 年龄：+age);package package5;import java.io.*;public class ObjectInFile public void writerObject()File outF = new File(object.txt);Students = new Student4;s0 = new Student(1sadas,21);s1 = new Student(2qwert,22);s2 = new Student(3yuiop,23);s3 = new Student(4mnbbv,24);tryFileOutputStream fileOut = new FileOutputStream(outF);ObjectOutputStream objectOut = new ObjectOutputStream(fileOut);for(int i=0;i4;i+)objectOut.writeObject(si);objectOut.close();fileOut.close();catch(IOException e)System.out .println(e);package package5;import java.io.*;public class ObjectOutFile public void readerObject()File outF = ne