📄 09-三步学会java socket编程(3).htm
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FONT-SIZE: 12px; COLOR: #333333; LINE-HEIGHT: 19px; TEXT-DECORATION: none}A.navigater:hover { COLOR: #cc0000}.g1 { FONT-SIZE: 14px}.g2 { PADDING-LEFT: 21px; PADDING-TOP: 5px}.g3 { FONT-WEIGHT: bold; COLOR: #ab6503}.g4 { COLOR: #ff0000}.img { BORDER-RIGHT: #800000 1px solid; BORDER-TOP: #800000 1px solid; BORDER-LEFT: #800000 1px solid; BORDER-BOTTOM: #800000 1px solid}.img1 { BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid}.f14 { FONT-SIZE: 14px; LINE-HEIGHT: 26px}.f20 { FONT-WEIGHT: bold; FONT-SIZE: 20px}.top_red { COLOR: #d70709; TEXT-DECORATION: none}.center01 { COLOR: #000000; LINE-HEIGHT: 20px}.center01 TD { COLOR: #000000; LINE-HEIGHT: 20px}.center01 A:link { COLOR: #000000; TEXT-DECORATION: none}.center01 A:visited { COLOR: #000000; TEXT-DECORATION: none}.center01 A:hover { COLOR: #2b7128; TEXT-DECORATION: underline}.center02 { COLOR: #194e00; LINE-HEIGHT: 20px}.center02 TD { COLOR: #194e00; LINE-HEIGHT: 20px}.center02 A:link { COLOR: #194e00; TEXT-DECORATION: none}.center02 A:visited { COLOR: #194e00; TEXT-DECORATION: none}.center02 A:hover { COLOR: #194e00; TEXT-DECORATION: underline}--></style><TABLE width=760 border=0 align=center cellPadding=0 cellSpacing=0 bgcolor="#F3F3F3" valign="top"> <tr class="center01"> <td width="488" style="padding-left:10px;padding-top:10px"> <a href="index.php">连载</a> > <a href="slist.php?class1=6">程序设计</a> > <a href="slist.php?class2=7">Java</a> > <a href="serialize.php?id=387">Java网络编程专辑</a> </td> <td width="280" style="padding-left:10px;padding-top:10px"> <div align="center"> <font color=#0000FF><a href='chapter.php?id=387&volume=3&chapter=8'>上一页</a></font> <font color=#0000FF><a href="serialize.php?id=387">回书目</a></font> <font color=#0000FF><a href='chapter.php?id=387&volume=3&chapter=10'>下一页</a></font> </div> </td> </tr> <tr class="center01"> <td colspan="2" align="center" style="padding-left:10px;padding-top:10px"> </td> </tr> <TBODY> <TR> <TD colspan="2" align=middle> <BR> <div style="FONT-SIZE: 18pt; COLOR: #990000; FONT-FAMILY: 楷体_GB2312" align=center><B>Socket套接字</b></div><br><div style="COLOR: #990000; font-family: ; font-size: 18px;宋体;" align=center>三步学会Java Socket编程(3)</div> <DIV style="PADDING-RIGHT: 10px; PADDING-LEFT: 10px; FONT-SIZE: 10.5pt; COLOR: black; LINE-HEIGHT: 180%" align=left> <br> <P><STRONG><FONT color=#ff0000>第三步 实现信息共享:在Socket上的实时交流<BR></FONT></STRONG><BR> 网络的伟大之一也是信息共享，Server可以主动向所有Client广播消息，同时Client也可以向其它Client发布消息。下面看看如何开发一个可以实时传递消息的程序。<BR><BR> <STRONG>设计原理：</STRONG><BR><BR> 服务器端接受客户端的连接请求，同时启动一个线程处理这个连接，线程不停的读取客户端输入，然后把输入加入队列中，等候处理。在线程启动的同时将线程加入队列中，以便在需要的时候定位和取出。<BR><BR> ｛源码｝<BR></P>
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<TD>import java.io.*;<BR>import java.net.*;<BR>import java.util.*;<BR>import java.lang.*;<BR><BR>public class Server extends ServerSocket<BR>{<BR>private static ArrayList User_List = new ArrayList();<BR>private static ArrayList Threader = new ArrayList();<BR>private static LinkedList Message_Array = new LinkedList();<BR>private static int Thread_Counter = 0;<BR>private static boolean isClear = true;<BR>protected static final int SERVER_PORT = 10000;<BR>protected FileOutputStream LOG_FILE = new FileOutputStream("d:/connect.log", true);<BR><BR>public Server() throws FileNotFoundException, IOException<BR>{<BR>super(SERVER_PORT);<BR>new Broadcast();<BR><BR>//append connection log<BR>Calendar now = Calendar.getInstance();<BR>String str = "[" + now.getTime().toString() + "] Accepted a connection\015\012";<BR>byte[] tmp = str.getBytes();<BR>LOG_FILE.write(tmp);<BR><BR>try<BR>{<BR>while (true)<BR>{<BR>Socket socket = accept();<BR>new CreateServerThread(socket);<BR>}<BR>}<BR>finally<BR>{<BR>close();<BR>}<BR>}<BR><BR>public static void main(String[] args) throws IOException<BR>{<BR>new Server();<BR>}<BR><BR>//--- Broadcast<BR>class Broadcast extends Thread<BR>{<BR>public Broadcast()<BR>{<BR>start();<BR>}<BR><BR>public void run()<BR>{<BR>while (true)<BR>{<BR>if (!isClear)<BR>{<BR>String tmp = (String)Message_Array.getFirst();<BR><BR>for (int i = 0; i < Threader.size(); i++)<BR>{<BR>CreateServerThread client = (CreateServerThread)Threader.get(i);<BR>client.sendMessage(tmp);<BR>}<BR><BR>Message_Array.removeFirst();<BR>isClear = Message_Array.size() > 0 ? false : true;<BR>}<BR>}<BR>}<BR>}<BR><BR>//--- CreateServerThread<BR>class CreateServerThread extends Thread<BR>{<BR>private Socket client;<BR>private BufferedReader in;<BR>private PrintWriter out;<BR>private String Username;<BR><BR>public CreateServerThread(Socket s) throws IOException<BR>{<BR>client = s;<BR>in = new BufferedReader(new InputStreamReader(client.getInputStream()));<BR>out = new PrintWriter(client.getOutputStream(), true);<BR>out.println("--- Welcome to this chatroom ---");<BR>out.println("Input your nickname:");<BR>start();<BR>}<BR><BR>public void sendMessage(String msg)<BR>{<BR>out.println(msg);<BR>}<BR><BR>public void run()<BR>{<BR>try<BR>{<BR>int flag = 0;<BR>Thread_Counter++;<BR>String line = in.readLine();<BR><BR>while (!line.equals("bye"))<BR>{<BR>if (line.equals("l"))<BR>{<BR>out.println(listOnlineUsers());<BR>line = in.readLine();<BR>continue;<BR>}<BR><BR>if (flag++ == 0)<BR>{<BR>Username = line;<BR>User_List.add(Username);<BR>out.println(listOnlineUsers());<BR>Threader.add(this);<BR>pushMessage("[< " + Username + " come on in >]");<BR>}<BR>else<BR>{<BR>pushMessage("<" + Username + ">" + line);<BR>}<BR><BR>line = in.readLine();<BR>}<BR><BR>out.println("--- See you, bye! ---");<BR>client.close();<BR>}<BR>catch (IOException e)<BR>{}<BR>finally<BR>{<BR>try<BR>{<BR>client.close();<BR>}<BR>catch (IOException e)<BR>{}<BR><BR>Thread_Counter--;<BR>Threader.remove(this);<BR>User_List.remove(Username);<BR>pushMessage("[< " + Username + " left>]");<BR>}<BR>}<BR><BR><BR>private String listOnlineUsers()<BR>{<BR>String s ="-+- Online list -+-\015\012";<BR><BR>for (int i = 0; i < User_List.size(); i++)<BR>{<BR>s += "[" + User_List.get(i) + "]\015\012";<BR>}<BR><BR>s += "-+---------------------+-";<BR>return s;<BR>}<BR><BR>private void pushMessage(String msg)<BR>{<BR>Message_Array.addLast(msg);<BR>isClear = false;<BR>}<BR>}<BR>}</TD></TR></TBODY></TABLE>
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<P><BR> 这就是程序运行后，多用户登陆并且输入信息后的屏幕。实现了信息的实时广播。用户输入"l"就可以列出在线人员表。</P><br><br> </DIV> </TD> </TR> <TR> <TD class=center01> <div align="center">来源：天极网 作者：<div> </TD> <TD width="280" class=center01> <div align="center"> <font color=#0000FF><a href='chapter.php?id=387&volume=3&chapter=8'>上一页</a></font> <font color=#0000FF><a href="serialize.php?id=387">回书目</a></font> <font color=#0000FF><a href='chapter.php?id=387&volume=3&chapter=10'>下一页</a></font> </div> </TD> </TR> </TBODY></TABLE><table><tr><td width="760"> <table width="760" height="10" border="0" cellpadding="0" cellspacing="0"> <tr> <td></td> </tr> </table> <!------------ 评论 ----------------> <table width="760" border="0" cellpadding="0" cellspacing="0"> <tr> <td><iframe width="100%" id=vs frameborder=0 scrolling=no src="comment_list1.php?id=387"></iframe> </td> </tr> </table><br><script language=javascript>function CheckNetwordForm(theForm){ if("" == theForm.content.value) { alert("写两句吧~~"); theForm.content.focus(); return false; } var index; for(index=0;index<theForm.content.value.length;index++) { if(" " != theForm.content.value.charAt(index)) break; } if(index == theForm.content.value.length) { alert("写两句吧~~"); theForm.content.focus(); return false; } if (theForm.content.value.length>100){ alert("评论字数不能超过100哦"); theForm.content.focus(); return false; } return true;}</script> <!------------------ 评论 ---------------> <form name=netword method=post action="insertnetword.php" onsubmit="javascript: return CheckNetwordForm(this);"> <table width="760" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="25" class="text6"> 给此书打分：<a name="1"></a> <select name="score"> <option value=5 selected>非常好</option> <option value=4>还凑合</option> <option value=3>一般吧</option> <option value=2>不太行</option> <option value=1>太差了</option> </select> 用户名： <input name="id" value=387 type="hidden" id="id"> <input name="backurl" value=/book/chapter.php?id=387&volume=3&chapter=9 type="hidden"> <input name="username" type="text" id="username" size="20" maxlength="20"> <font color="#666666">*评论字数请控制在一百字以内</font> </td> </tr> </table> <br> <textarea name="content" cols="80" rows="4" wrap="OFF" id="description"></textarea> <input type="submit" name="Submit" value="提交"> </form> </td> </tr></table></td></tr></table> <TABLE cellSpacing=0 cellPadding=0 width=760 border=0> <TBODY> <TR> <TD width="1003" height=9 background=images/t_bj01.gif><IMG height=1 src="images/ccc.gif" width=1></TD> </TR> </TBODY></TABLE><TABLE cellSpacing=0 cellPadding=0 width=760 bgColor=#ffffff border=0> <TBODY> <TR> <TD><HR width=760 noShade SIZE=1> </TD> </TR> <TR> <TD align=middle><A class=black href="http://www.chinaren.com/" target=_blank>ChinaRen</A> - <A class=black href="http://big5.www.sohu.com/" target=_blank>繁体版</A> - <A class=black href="http://hr.sohu.com/hrm.html" target=_blank>搜狐招聘</A> - <A class=black href="http://add.sohu.com/" target=_blank>网站登录</A> - <A class=black href="http://help.sohu.com/" target=_blank>帮助中心</A> - <A class=black href="http://book.news.sohu.com/onClick=this.style.behavior='url(#default#homepage)';this.setHomePage('http://www.sohu.com');return" target=_blank false;>设置首页</A> - <A class=black href="http://adinfo.sohu.com/" target=_blank>广告服务</A> - <A class=black href="http://www.sohu.com/about/lianxi.htm" target=_blank>联系方式</A> - <A class=black href="http://www.sohu.com/about/privacy.html" target=_blank>保护隐私权</A> - <A class=black href="http://www.sohu.com/about/" target=_blank>About SOHU</A> - <A class=black href="http://www.sohu.com/about/" target=_blank>公司介绍</A><BR> <SPAN class=eng>Copyright © 2004 Sohu.com Inc. All rights reserved. 搜狐公司 版权所有</SPAN> </TD> </TR> </TBODY></TABLE></center></body></html><script language="JavaScript" src="http://nielsen.js.sohu.com/nnselect.js"></script><noscript><img src='http://ping.nnselect.com/ping.gif?c=119' height='1' width='1'></noscript>⌨️ 快捷键说明
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