Java项目实训

1、.java项目实训一、将服务器上的资源读到本机1、从键盘输入网址，将该网址的内容读入到本机并输出import .*;import java.io.*;import java.util.*;public class lx1 public static void main(string args) scanner scanner; url url; system.out.println(输入url资源,例如:); scanner = new scanner(system.in); string source = scanner.nextline

2、(); try url = new url(source); inputstream in = url.openstream(); byte b = new byte1024; int n=-1; while(n=in.read(b)!=-1) string str = new string(b,0,n); system.out.print(str); catch(exception exp) system.out.println(exp); 2、从键盘输入网址，将该网址的内容读入到本机并输出到一个文件urltext中。import .*;import java.io.*;im

3、port java.io.*;import java.util.*;public class lx2 public static void main(string args) scanner scanner; url url; system.out.println(输入url资源,例如:); scanner = new scanner(system.in); string source = scanner.nextline(); try url = new url(source);精品. inputstream in = url.openstream();

4、 byte b = new byte1024; int n=-1; fileoutputstream out=new fileoutputstream(urltext.txt); while(n=in.read(b)!=-1) string str = new string(b,0,n); out.write(b,0,n); system.out.print(str); catch(exception exp) system.out.println(exp); 3、用线程技术实现上述程序import .*;import java.io.*;import java.util.*;

5、public class example13_1 public static void main(string args) scanner scanner; url url; thread readurl; look look = new look(); system.out.println(输入url资源,例如:); scanner = new scanner(system.in); string source = scanner.nextline(); try url = new url(source); look.seturl(url); readu

6、rl = new thread(look); catch(exception exp) system.out.println(exp); readurl = new thread(look); readurl.start(); import .*;import java.io.*;精品.public class look implements runnable url url; public void seturl(url url) this.url=url; public void run() try inputstream in = url.openstream(); by

7、te b = new byte1024; int n=-1; while(n=in.read(b)!=-1) string str = new string(b,0,n); system.out.print(str); catch(ioexception exp) 二、读取主机地址和本机地址1、调试下列读取主机名称及ip地址的程序import .*; public class example13_2 public static void main(string args) try inetaddress address_1=inetaddress.getbyname(www.s

8、); system.out.println(address_1.tostring(); inetaddress address_2=inetaddress.getbyname(); system.out.println(address_2.tostring(); catch(unknownhostexception e) system.out.println(无法找到 ); 2、从键盘输入任意主机名，读取主机地址、本机地址import .*;import java.io.*;import java.io

9、.*;import java.util.*;public class ex2 public static void main(string args) scanner scanner; url url;精品. system.out.println(输入url资源,例如:); scanner = new scanner(system.in); string source = scanner.nextline(); try inetaddress address_1=inetaddress.getbyname(source); system.out.println(add

10、ress_1.tostring(); inetaddress address_2=inetaddress.getlocalhost(); system.out.println(address_2.tostring(); catch(unknownhostexception e) system.out.println(无法找到 ); 三、套接字应用1、编程实现客户端与服务端之间的应答通讯服务端代码：import java.io.*;import .*;public class server public static void main(string

11、 args) string answer =南非,进入世界杯了,哈哈.问题真逗!; serversocket serverforclient=null; socket socketonserver=null; dataoutputstream out=null; datainputstream in=null; try serverforclient = new serversocket(2010); catch(ioexception e1) system.out.println(e1); try system.out.println(等待客户呼叫); socketonserver = se

12、rverforclient.accept(); /堵塞状态，除非有客户呼叫 out=new dataoutputstream(socketonserver.getoutputstream(); in=new datainputstream(socketonserver.getinputstream(); for(int i=0;ianswer.length;i+) string s=in.readutf(); / in读取信息，堵塞状态 system.out.println(服务器收到客户的提问:+s); out.writeutf(answeri); thread.sleep(500); ca

13、tch(exception e) 精品. system.out.println(客户已断开+e); 服务端代码import java.io.*;import .*;public class server public static void main(string args) string answer =南非,进入世界杯了,哈哈.问题真逗!; serversocket serverforclient=null; socket socketonserver=null; dataoutputstream out=null; datainputstream in=null; try

14、 serverforclient = new serversocket(2010); catch(ioexception e1) system.out.println(e1); try system.out.println(等待客户呼叫); socketonserver = serverforclient.accept(); /堵塞状态，除非有客户呼叫 out=new dataoutputstream(socketonserver.getoutputstream(); in=new datainputstream(socketonserver.getinputstream(); for(int

15、 i=0;ianswer.length;i+) string s=in.readutf(); / in读取信息，堵塞状态 system.out.println(服务器收到客户的提问:+s); out.writeutf(answeri); thread.sleep(500); catch(exception e) system.out.println(客户已断开+e); 2、通过键盘输入问答方式，实现客户与服务器之间的对话，任何一端回答“bye”时，结束。服务器端程序代码：import java.io.*;import .*;import java.util.*;public c

16、lass server1 精品. public static void main(string args) string answer; serversocket serverforclient=null; socket socketonserver=null; dataoutputstream out=null; datainputstream in=null; scanner scanner= new scanner(system.in); try serverforclient = new serversocket(2010); catch(ioexception e1) system.

17、out.println(e1); try system.out.println(等待客户呼叫); socketonserver = serverforclient.accept(); /堵塞状态，除非有客户呼叫 out=new dataoutputstream(socketonserver.getoutputstream(); in=new datainputstream(socketonserver.getinputstream(); while(true) string s=in.readutf(); / in读取信息，堵塞状态 system.out.println(服务器收到客户的发言:

18、+s); system.out.print(服务器发言:); answer = scanner.nextline(); if (answer.equals(bye) break; out.writeutf(answer); catch(exception e) system.out.println(客户已断开+e); 客户端代码：import .*;import java.io.*;import java.util.*;public class client1 public static void main(string args) scanner scanner= new s

19、canner(system.in); string mess; string s; socket mysocket; datainputstream in=null; dataoutputstream out=null;精品. try mysocket=new socket(,2010); in=new datainputstream(mysocket.getinputstream(); out=new dataoutputstream(mysocket.getoutputstream(); while (true) system.out.print(客户发言：); mess

20、 = scanner.nextline(); if (mess.equals(bye) break; out.writeutf(mess); s=in.readutf(); /in读取信息，堵塞状态 system.out.println(客户收到服务器的信息:+s); catch(exception e) system.out.println(服务器已断开+e); 3、服务器端代码不变，客房端按以下届面设计客户端的程序代码如下：public class client2 public static void main(string args) cc win=new cc(); win.setbo

21、unds(100,100,460,360); win.settitle(聊天程序客户端) 精品.import java.awt.event.*;import java.awt.*;import javax.swing.*;import .*;import java.io.*;import java.util.*;public class cc extends jframe jtextfield inputtext; jtextarea textshow; jbutton button; policelisten listener; public cc() init(); set

22、visible(true); setdefaultcloseoperation(jframe.exit_on_close); void init() socket mysocket; datainputstream in=null; dataoutputstream out=null; try mysocket=new socket(,2010); in=new datainputstream(mysocket.getinputstream(); out=new dataoutputstream(mysocket.getoutputstream(); setlayout(ne

23、w flowlayout(); textshow = new jtextarea(9,30); inputtext = new jtextfield(10); button = new jbutton(发送); listener = new policelisten(); listener.setjtextfield(inputtext); listener.setjtextarea(textshow); listener.setin(in); listener.setout(out); inputtext.addactionlistener(listener); button.addactionlistener(listener); add(new jscrollpane(textshow); add(inputtext); add(button); catch(exception e) system.out.println(服务