網(wǎng)絡(luò)應(yīng)用開(kāi)發(fā)綜合實(shí)踐《java聊天系統(tǒng)》

1、xxxxxxxxxxxxx 學(xué)院網(wǎng)絡(luò)工程系網(wǎng)絡(luò)應(yīng)用開(kāi)發(fā)綜合實(shí)踐基于tcp的java及時(shí)聊天系統(tǒng)設(shè)計(jì)報(bào)告姓 名: 學(xué) 號(hào): 班 級(jí): 指導(dǎo)老師: 完成時(shí)間:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx基于tcp的java及時(shí)聊天系統(tǒng)摘要tcp/ip網(wǎng)絡(luò)體系結(jié)構(gòu)和協(xié)議標(biāo)準(zhǔn)是近年來(lái)計(jì)算機(jī)網(wǎng)絡(luò)研究和應(yīng)用的熱點(diǎn)技術(shù)， 以它為基礎(chǔ)組建的internet已成為口前國(guó)際上規(guī)模最大的計(jì)算機(jī)網(wǎng)絡(luò)系統(tǒng)。在我 國(guó)，tcp/ip也越來(lái)越受到廣泛關(guān)注,并得以多層次推廣。在tcp/ip的模型屮，傳輸 層有兩個(gè)并列的協(xié)議：tcp (transport control protocol,傳

2、輸控制協(xié)議)和udp (user datagram protocol,用戶數(shù)據(jù)報(bào)協(xié)議)。tcp和udp共存于一個(gè)網(wǎng)絡(luò)中,tcp 是而向連接的，提供可靠性服務(wù)，udp是無(wú)連接的，提供高效率服務(wù)。高可靠性的 tcp通常用于一次傳輸要交換大量報(bào)文的情形，比如文件傳輸、遠(yuǎn)程登錄等;高效率 的udp 般用于一次傳輸交換少量報(bào)文，尤其是交易型應(yīng)用，比如數(shù)據(jù)庫(kù)查詢的情形, 其可靠性由應(yīng)用程序提供，因?yàn)榻粨Q次數(shù)不多，即便發(fā)生傳輸錯(cuò)謀，必須重傳,應(yīng)用程 序也不會(huì)為此付出太大的代價(jià)。在網(wǎng)絡(luò)越來(lái)越發(fā)達(dá)的今天，人們對(duì)網(wǎng)絡(luò)的依賴越來(lái)越多，越來(lái)越離不開(kāi)網(wǎng)絡(luò)， 由此而產(chǎn)生的聊天工具越來(lái)越多，網(wǎng)絡(luò)聊天時(shí)一類的聊天系統(tǒng)的發(fā)展日

3、新月異。本 java及時(shí)聊天系統(tǒng)即是一個(gè)使用套接字(socket)實(shí)現(xiàn)c/s (client and server)模式 的tcp/ip協(xié)議下連接的及時(shí)通信系統(tǒng)。本論文主要分為六章：第一章引言，介紹本java及時(shí)聊天系統(tǒng)的需求分析， 闡述了項(xiàng)口的開(kāi)發(fā)背景、系統(tǒng)設(shè)計(jì)方法，明確了該設(shè)計(jì)的主要任務(wù)。第二章是系統(tǒng) 的概要設(shè)計(jì)，詳細(xì)描述了聊天系統(tǒng)的運(yùn)行環(huán)境，系統(tǒng)的結(jié)構(gòu)設(shè)計(jì)以及設(shè)計(jì)實(shí)現(xiàn)的基 本功能。第三章描述了使用myeclipse完成系統(tǒng)架構(gòu)設(shè)計(jì)，實(shí)現(xiàn)簡(jiǎn)便切邏輯化的程 序設(shè)計(jì)。第四章是系統(tǒng)的詳細(xì)設(shè)計(jì)，詳細(xì)介紹了系統(tǒng)的結(jié)構(gòu)以及各個(gè)功能模塊的設(shè) 計(jì)細(xì)節(jié)。第五章是對(duì)本java及時(shí)聊天系統(tǒng)的測(cè)試結(jié)果報(bào)告，主要針

4、對(duì)系統(tǒng)各功能 模塊進(jìn)行細(xì)節(jié)測(cè)試。最后是本次網(wǎng)絡(luò)應(yīng)用開(kāi)發(fā)綜合實(shí)踐的總結(jié)及體會(huì)。關(guān)鍵詞:java； tcp/ip； c/s； myeclipse；及時(shí)通信abstracttcp/ip network system structure and protocol standards in recent years is to study and application of computer network by its hotspot technologies based internet has become a current internationafs largest computer ne

5、twork system. in our country, the tcp/ip is also more and more attention, and to multi-level promotion. on tcp/ip model, the transport layer has two paratactic agreement: transport control protocol (tcp, tcp and udp (user datagram) protocol, user data reported protocol). tcp and udp coexist in a net

6、work, the tcp is connection-oriented, provide reliability service, udp is no connection, with efficient service high reliability of the tcp normally used for a transmission of messages to exchange the situation, such as file transfer, remote login, etc.; efficient udp general for a transmission mess

7、age, especially for small amounts, such as transactional database query application situation, its reliability by applications provide, because few, even happen exchange frequency transmission error, necessitating retransmission, applications also won't pay the too big price.in network is more a

8、nd more developed today, people depending on the internet, more and more tied to the internet, which produces more chatting tools, online chat chatting system when the development of a day. the java timely chat system is a use socket (socket) to implement c/s (and server) mode are under the tcp/ip p

9、rotocol connect timely communication system.this thesis mainly divided into six chapters: the first chapter preface, introduce the java chat system timely requirement analysis, expounds the development background, system project design methods, clear the design of the main task. the second chapter i

10、s system of general design, describes the detailed chat the operation of the system environment, system design and implementation of structural design and basic function. the third chapter describes myeclipse complete use of system architecture design, realization of simple cut logic programming. th

11、e fourth chapter is system of the detailed design, detailed introduction of system structure and modules design details. the fifth chapter is illustrative of the java timely chat systems test results report, the function module mainly aimed at the system detail test. the last is the network applicat

12、ion development and comprehensive the summary of practice and experiencekeywords： java; tcp/ip; c/s;myeclipse; timely communication摘要2abstract3一. 引言61. 1背景61. 2需求分析6二. 系統(tǒng)設(shè)計(jì)72.1功能概述72.2運(yùn)行環(huán)境72.3系統(tǒng)結(jié)構(gòu)8三. 系統(tǒng)架構(gòu)設(shè)計(jì)83. 1整體設(shè)計(jì)83.2服務(wù)器端設(shè)計(jì)93.3客戶端設(shè)計(jì)10四. 詳細(xì)設(shè)計(jì)104.1聊天室服務(wù)器端設(shè)計(jì)104. 1 1 server java104. 1. 2 serverlisten

13、java164. 1. 3 serverreceive. java 174. 1. 4 porconf. java204. 1. 5 node- java224. 1. 6 userlinklist. java224. 1. 7 help, java244.2聊天室客戶端設(shè)計(jì)244. 2. 1 client- java254- 2. 2 cl ientreceive. java304- 2. 3 connectconf. java314. 2. 4 userconf. java32五. 測(cè)試報(bào)告345. 1系統(tǒng)界面預(yù)覽345.2測(cè)試過(guò)程345. 2. 1服務(wù)器端端口設(shè)置及偵聽(tīng)功能345. 2.

14、 2客戶端連接功能355. 2. 2用戶信息設(shè)置功能355. 2. 3用戶登錄/注銷功能365. 2. 4聊天通信功能375. 2. 5幫助服務(wù)功能39六總結(jié)及體會(huì)40七.參考文獻(xiàn)40一.引言1.1背景在網(wǎng)絡(luò)越來(lái)越發(fā)達(dá)的今天，人們對(duì)網(wǎng)絡(luò)的依賴越來(lái)越多，越來(lái)越離不開(kāi)網(wǎng)絡(luò)， 由此而產(chǎn)生的聊天工具越來(lái)越多，類似飛鴿等一類的聊天、文件傳送系統(tǒng)的發(fā)展fi新月 異，應(yīng)20102011學(xué)年第二學(xué)期網(wǎng)絡(luò)應(yīng)用開(kāi)發(fā)綜合實(shí)踐課程要求，我選擇 制作一個(gè)局域網(wǎng)的網(wǎng)絡(luò)聊天工具作為本次的綜合實(shí)踐課程；以求通過(guò)制作該系統(tǒng)能 更好的學(xué)習(xí)網(wǎng)絡(luò)編程及應(yīng)用開(kāi)發(fā)。本次選題為“基于tcp的java聊天系統(tǒng)”的口的就是指直接或間接地通過(guò)網(wǎng)

15、 絡(luò)協(xié)議與其他計(jì)算機(jī)進(jìn)行通訊。網(wǎng)絡(luò)編程中有兩個(gè)主要的問(wèn)題，一個(gè)是如何準(zhǔn)確的 定位網(wǎng)絡(luò)上一臺(tái)或多臺(tái)主機(jī)，另一個(gè)就是找到主機(jī)后如何可靠高效的進(jìn)行數(shù)據(jù)傳 輸。在tcp/ip協(xié)議屮ip層主要負(fù)責(zé)網(wǎng)絡(luò)主機(jī)的定位，數(shù)據(jù)傳輸?shù)穆酚?，由ip地 址可以唯一地確定internet上的一臺(tái)主機(jī)。而tcp層則提供面向應(yīng)用的可靠的或非 可靠的數(shù)據(jù)傳輸機(jī)制，這是網(wǎng)絡(luò)編程的主要對(duì)象，一般不需要關(guān)心ip層是如何處 理數(shù)據(jù)的。目前較為流行的網(wǎng)絡(luò)編程模型是客戶機(jī)/服務(wù)器（c/s）結(jié)構(gòu)。即通信雙 方一方作為服務(wù)器等待客戶提出請(qǐng)求并予以響應(yīng)。客戶則在需要服務(wù)時(shí)向服務(wù)器提 出申請(qǐng)。服務(wù)器一般作為守護(hù)進(jìn)程始終運(yùn)行，監(jiān)聽(tīng)網(wǎng)絡(luò)端口，一旦有客

16、戶請(qǐng)求，就 會(huì)啟動(dòng)一個(gè)服務(wù)進(jìn)程來(lái)響應(yīng)該客戶，同時(shí)自己繼續(xù)監(jiān)聽(tīng)服務(wù)端口，使后來(lái)的客戶也 能及時(shí)得到服務(wù)。1. 2需求分析本基于tcp的java聊天系統(tǒng)具體目的是通過(guò)網(wǎng)絡(luò)協(xié)議與其他計(jì)算機(jī)進(jìn)行通 訊。主要實(shí)現(xiàn)如下需求口的：登錄/注銷、實(shí)時(shí)聊天、狀態(tài)顯示、幫助操作等。作為當(dāng)今最流行的及時(shí)通信工具，騰訊qq、msn等軟件具有強(qiáng)大的聊天、文件 傳輸、圖片保存、遠(yuǎn)程協(xié)助等功能，在日常的生活工作中對(duì)人與人z間通信幫助巨 大，在一定程度上甚至已經(jīng)取代傳統(tǒng)的信件通信。本次的網(wǎng)絡(luò)應(yīng)用開(kāi)發(fā)綜合實(shí)踐我 就是以通信中最基本的聊天消息收發(fā)方式設(shè)計(jì)一個(gè)基于tcp的java及時(shí)聊天系 統(tǒng)，由于能力有限，所以把一些要求較高的功能

17、刪除了，只留卜了聊天這一簡(jiǎn)單的通信功能。此簡(jiǎn)單及時(shí)聊天通信系統(tǒng)通過(guò)走陽(yáng)語(yǔ)言編寫，提供給用戶基本的純文本 消息收發(fā)功能，能夠通過(guò)c/s結(jié)構(gòu)實(shí)現(xiàn)消息的轉(zhuǎn)發(fā)和接收。系統(tǒng)設(shè)計(jì)2. 1功能概述本java即時(shí)聊天系統(tǒng)是一個(gè)基于tcp的、由java語(yǔ)言編寫的典型應(yīng)用程序， 它運(yùn)用口前較為流行的網(wǎng)絡(luò)編程模型是客戶機(jī)/服務(wù)器(c/s)結(jié)構(gòu)，實(shí)現(xiàn)通信雙方 一方作為服務(wù)器等待客戶提出請(qǐng)求并予以響應(yīng)。客戶則在需要服務(wù)時(shí)向服務(wù)器提出 申請(qǐng)。服務(wù)器一般作為守護(hù)進(jìn)程始終運(yùn)行，監(jiān)聽(tīng)網(wǎng)絡(luò)端口，一旦有客戶請(qǐng)求，就會(huì) 啟動(dòng)一個(gè)服務(wù)進(jìn)程來(lái)響應(yīng)該客戶，同時(shí)自己繼續(xù)監(jiān)聽(tīng)服務(wù)端口，使后來(lái)的客戶也能 及時(shí)得到服務(wù)，其系統(tǒng)主要功能概述如下：(

18、1) 登錄/注銷功能：在服務(wù)器端啟動(dòng)服務(wù)開(kāi)始偵聽(tīng)后，客戶端可以登錄聊天系統(tǒng)進(jìn) 行及時(shí)聊天；或者結(jié)束聊天注銷登錄。(2) 聊天功能：客戶可以通過(guò)服務(wù)器轉(zhuǎn)發(fā)消息,實(shí)現(xiàn)一對(duì)一和多對(duì)多聊天。(3) 設(shè)置功能：客戶端可以在登錄前進(jìn)行基本信息設(shè)置功能。(4) 顯示功能：客戶端程序應(yīng)該可以實(shí)時(shí)顯示目前所有客戶端用戶的狀態(tài)。2. 2運(yùn)行環(huán)境硬件：pc機(jī)操作系統(tǒng)：windows 2oo3/xp/vista/7 編譯環(huán)境：myeclipse 8.5+tomcat 6.0 開(kāi)發(fā)工具：myeclipse &5+tomcat 6.0 編程語(yǔ)言：java2. 3系統(tǒng)結(jié)構(gòu)java聊人系統(tǒng)圖2. 3系統(tǒng)結(jié)構(gòu)三.系統(tǒng)架

19、構(gòu)設(shè)計(jì)3. 1整體設(shè)計(jì)本java聊天系統(tǒng)在myeclipse 8.5設(shè)計(jì)時(shí)嚴(yán)格按照c/s結(jié)構(gòu)設(shè)計(jì)，客戶端 “client”及服務(wù)器端"server"分別實(shí)現(xiàn)需求分析小的口的，具體整體設(shè)計(jì)結(jié)構(gòu)如 下圖所示：了;呂 myjavatalk3. 2服務(wù)器端設(shè)計(jì)圖3.靠務(wù)器端設(shè)計(jì)辛磚srcyclient卜dient.javai clientreceive.java j£| connectconf.java 卜 help.java j userconf.javai卜唱image serveri回 help.java 卜£ node.java 卜屈 portconf.

20、javaserver .java serverlisten.java丄| serverreceive .javaau| userlinklist.javaeft jre system library javase-1.6圖3.1系統(tǒng)整體架構(gòu)設(shè)計(jì)3.3客戶端設(shè)計(jì)圖3. 2客戶器端設(shè)計(jì)u!詳細(xì)設(shè)計(jì)本基于tcp的java及時(shí)聊天系統(tǒng)一共包含2個(gè)部分：server部分和client部 分，分別實(shí)現(xiàn)服務(wù)器端功能和客戶端功能。4. 1聊天室服務(wù)器端設(shè)計(jì)聊天室服務(wù)端主要包括7個(gè)文件，它們的功能如下：4. 1. 1 server, javaserver, java包含名為server的public類，其主要功

21、能為定義服務(wù)器端的界 而，添加事件偵聽(tīng)與事件處理。調(diào)用serverlisten類來(lái)實(shí)現(xiàn)服務(wù)端用戶上線與下 線的偵聽(tīng)，調(diào)用serverreceive類來(lái)實(shí)現(xiàn)服務(wù)器端的消息的收發(fā)。主要實(shí)現(xiàn)方法源 代碼如下：package server;import java.awt*; import javaawtevent*;import javax.swing.*;import javaxswingevent.*; import javanet*;import jmvaio.*;/ *聊天服務(wù)端的主框架類*/public class server extends jframe implements actio

22、nlistener public static int port = 8888; /服務(wù)端的偵聽(tīng)端口 serversocket serversocket; /服務(wù)端socketimage icon; /程序圖標(biāo)jcombobox combobox; /選樣發(fā)送消息的接受:者jtextarea messageshow; /服務(wù)端的信息顯示 jscrollpane messagescrollpane; /信息顯小的滾動(dòng)條 jtextfield showstatus; /顯示用八連接狀態(tài) jlabel sendtolabel,messagelabel;jtextfield sysmessage; /

23、服務(wù)端消息的發(fā)送 jbutton sysmessagebutton; /服務(wù)端消息的發(fā)送按鈕 userlinklist userlinklist; /丿u戶鏈表/建立菜單欄jmenubar jmenubar = new jmenubar（）;/建立菜單組jmenu servicemenu = new jmenu （ huk（v） n ）;/建立菜單項(xiàng)jmenuitemjmenuitemjmenuitemjmenuitemportltem = new jmenuitem （”端口設(shè)置（p）“）； startitem = new jmenuitem （”啟動(dòng)月艮務(wù)（s） ”）； stopltem=

24、new jmenuitem （"停止月比務(wù)（t）”）； exititem=new jmenuitem （”退出（x）”）；jmenu helpmenu=new jmenu （"幫助（h）”）；jmenuitem helpltem=new jmenuitem （”幫助（h）”）；/建立工具欄 jtoolbar toolbar = new jtoolbar（）;/建立工具欄中的按鈕組件/框架的人小/*服務(wù)端構(gòu)造函數(shù)*/public server（）j_close);/添加框架的關(guān)閉事件處理thissetdefaultcloseoperation(jframeexit_ this

25、pack();/設(shè)置框架的大小this.setsize (facesize);/設(shè)置運(yùn)行時(shí)窗口的位置this settitle （"聊天室服務(wù)端” ）;/設(shè)置標(biāo)題/ *程序初始化函數(shù)*/public void init () container contentpane = getcontentpane (); contentpanesetlayout(new borderlayout();/添加菜單欄/初始化按鈕/將按鈕添加到丁具欄/初始時(shí)，令停止服務(wù)按鈕不町用 stopserver.setenabled(false); stopitem setenabled(false);/為菜單

26、欄添加事件監(jiān)聽(tīng)portitem.addactionlistener(this); start item.addactionlistener(this); stopitem.addactionlistener(this); exititemaddactionlistener(this); helpitem.addactionlistener(this);/添加按鈕的事件偵聽(tīng)portsetaddactionlistener(this); startserver.addactionlistener(this); stopserveraddactionlistener(this); exitbutto

27、naddactionlistene匚(this);combobox = new jcombobox(); combobox . insert itemat (1所有人,0);comboboxsetselectedlndex(0);messageshow = new jtextarea(); messageshow.seteditable (false);/添加滾動(dòng)條/添加系統(tǒng)消息的爭(zhēng)件偵聽(tīng)sysmessage.addactionlistener(this); sysmessagebutton.addactionlistener(this);sendtolabel = new jlmbel (&

28、quot;發(fā)送至：”)； messagelabel = new jlabel ("發(fā)送消息：”)； downpanel = new jpanel ();girdbag = new gridbaglayout(); downpanelsetlayout (girdbag);girdbagcon = new gridbagconstraints ();jlabel none = new jlabel(ngirdbagcongirdbagcongirdbagcongirdbagcongirdbagcongirdbagconnew gridbagconstraints(); new grid

29、bagconstraints (); new gridbagconstraints(); new gridbagconstraints (); new gridbagconstraints (); new gridbagconstraints ();/關(guān)閉程序時(shí)的操作thisaddwindowlistener(new windowadapter () public void windowclosing(windowevent e) stopservice();system.exit(0););/*事件處理*/public void actionperformed(actionevent e)

30、object obj = e.getsource();if (obj = startserver | | obj = startitem) /丿動(dòng)務(wù)端 startservice ();else if (ob j = stopserver | | ob j = stopitem) /(止服務(wù)端 else if (obj = portset i | obj = portitem) /帶口設(shè)'首：/調(diào)出端口設(shè)置的対話框portconf portconf = new portconf(this);portconfshow();else if (ob j = exitbutton | | ob

31、j = exit item) /退川i 程序else if (obj = helpitem) /菜單欄中的幫助 /調(diào)出幫助對(duì)話框help helpdialog = new help (this);helpdialog s嵌w ();else if (obj = sysmessage | obj = sysmessagebutton) /發(fā)送系統(tǒng)消息sendsystemmessage();/ *啟動(dòng)服務(wù)端*/public void startservice()try serversocket = new serversocket(port,10);message show. append (&q

32、uot;服務(wù)端已經(jīng)啟動(dòng),在,f+port+n 端口偵聽(tīng)n,f);uatuh (exception e) /system.outprintin (e);userlinklist = new userlinklist();listenthread = newserverlisten(serversocket,combobox,messageshow,showstatus,userlinklist); listenthread.start ();/ *關(guān)閉服務(wù)端*/public void stopservice () try/向所有人發(fā)送服務(wù)器關(guān)閉的消息messageshow. append ( ”

33、服務(wù)端已經(jīng)關(guān)閉n” );combobox.removeallitems();combobox mddltem ("所有人”);catch(exception e)/system.out.printin(e); 亠/ *向所有人發(fā)送服務(wù)器關(guān)閉的消息*/public void sendstoptoall()int count = userlinklist. getcount () ; /用戶總數(shù)int i = 0;while(i < count)node node = userlinklistfinduser (i);if(node = null) i + + ；continue;

34、trynode . output. writeobject (”服務(wù)關(guān)閉”);nodeoutput.flush ();catch (exception e)/system.out.printin (n$n+e);i + + ；/ *向所有人發(fā)送消息*/public void sendmsgtoall(string msg)int count = userlinklist getcount ();/用戶總數(shù)int i = 0;while(i < count)node node = userlinklist.finduser (i);if(node = null) i + + ；contin

35、ue;trynode . output .writeobject ("系統(tǒng)信息”);nodeoutput.flush ();node.output.writeobject(msg);nodeoutput.flush ();catch (exception e)/system.out.printin (nn+e); 'i + + ；sysmessage.settext (h h);/ * *向客戶端用戶發(fā)送消息*/public void sendsystemmessage()string tosomebody = comboboxgetselecteditem() .tostr

36、ing (); string message = sysmessage . gettext () + h n11;messageshow.append(message);/向所有人發(fā)送消息 if (tosomebody equalslgnorecase (”所有人” ) sendmsgtoall(message);else /向某個(gè)用戶發(fā)送消息node node = userlinklistfinduser(tosomebody); try node output. writeobject (”系統(tǒng)信息”);nodeoutput.flush ();nodeoutputwriteobject(m

37、essage); nodeoutputflush ();catch(exception e) /system, out print in (n ! ! ! ,f+e); sysmessage. settext ("") ; /將發(fā)送消息欄的消息清空public static void main(string args) server app=new server ();4. 1. 2 serverlisten. java該類實(shí)現(xiàn)服務(wù)端用戶上線與下線的偵聽(tīng)。該類對(duì)用戶上線下線的偵聽(tīng)是通過(guò)調(diào) 用用戶鏈表類(userlinklist)來(lái)實(shí)現(xiàn)的，當(dāng)用戶上線與下線情況發(fā)生變化時(shí)，該

38、類會(huì)對(duì)主類的界面進(jìn)行相應(yīng)的修改。主要實(shí)現(xiàn)方法源代碼如下：public class serverlisten extends threadfserversocket server;jcombobox combobox;jtextarea textarea;jtextfield textfield;userlinklist userlinklist; /用八鏈表node client;serverreceive recvthread;public boolean isstop;/ *聊天服務(wù)端的用戶上線于下線偵聽(tīng)類*/public serverlisten(serversocket server,

39、jcombobox combobox, jtextarea textarea,jtextfield textfield,userlinklist userlinklist)this.server = server;thiscombobox = combobox;thistextarea = textarea;thistextfield = textfield;thisuserlinklist = userlinklist;isstop = false;public void run() while(!isstop && !server.isclosed()tryclient =

40、 new node ();clientsocket = serveraccept ();client.output = newobjectoutputstream(clientsocketgetoutputstream();clientoutput.flush();client.input = newobjectinputstream(clientsocketget inputstream();clientusername =(string)clientinputreadobject();/顯示提示信息comboboxadditem(clientusername); userlinklist.

41、adduser(client);textarea append (11 + client. user name + " 上 線” + nnn);text field. set text ('* 在線用戶"+userlinklist get count () + n an,f);recvthread = newserverreceive(textarea,textfield,combobox, die nt, userl in klist);recvthread.start ();catch(exception e)4. l 3 serverreceive. java

42、該類是實(shí)現(xiàn)服務(wù)器端的消息的收發(fā)的類。該類分別定義了向某用戶及所有人發(fā) 送消息的方法，發(fā)送的消息會(huì)顯示在主界面類的界面上。主耍實(shí)現(xiàn)方法源代碼如 下：/ *服務(wù)器收發(fā)消息的類*/public class serverreceive extends thread jtextarea textarea;jtextfield textfield;jcombobox combobox;node client;userlinklist userlinklist; /用戶鏈農(nóng) public boolean isstop;public serverreceive(jtextarea textarea,jtext

43、field text field, jcombobox combobox,node client,userlinklist userlinklist) thistextarea = textarea;this.textfield = textfield;this.client = client;this.userlinklist = userlinklist; thiscombobox = combobox;isstop = false;public void run()/向所有人發(fā)送用戶的列表 senduserlist ();while(!isstop && !clients

44、ocketisclosed () trystring type = (string)clientinputreadobject(); if (type . equal signor ecase ( ”聊天信息” )string tosomebody =(string)clientinputreadobject();string status =(string)clientinputreadobject();string action =(string)clientinputreadobject();string message =(string)clientinputreadobject();

45、string msg = client.username+ l! 11 + action+開(kāi)對(duì)n+ tosomebody+ ” 說(shuō)：”+ message+ nnn;if (status equal signor ecase (111 肖悄話” ) msg = ” 悄悄話” + msg; textareaappend(msg);if (tosomebody . equal signor ecase (1所有人” ) sendtoall (msg) ; /向所有人發(fā)送消息else tryclientoutputwriteobject (”聊 天信息”)；clientoutput.flush ();

46、client.output.writeobject(msg);clientoutput.flush();catch (exception e)/system, out print l_n#”+e);node node =userlinklistfinduser(tosomebody);if(node != null)node output. writeob ject ("聊天 信息”);nodeoutput.flush ();nodeoutputwriteobject(msg); nodeoutputflush();else if (type equal signor ecase (

47、"用八下線”)node node = userlinklistfinduser(clientusername);userlinklist.deluser(node);string msg = ”用戶 h + die nt usetname + h 下線n”；int count = userlinklist.getcount();comboboxremoveal1items();combobox . additem (，所有人');int i = 0;while(i < count)node = userlinklist-finduser(i);if (node = nu

48、ll) i + + ； continue;comboboxadditem(nodeusername);i + + ；comboboxsetselectedlndex(0);textereeappend(msg);text fie id. set text ('* 在線用戶"+ userlinklistgetcount () + nann );sendtoall (msg) ; /向所有人發(fā)送消息 senduserlist () ; /重新發(fā)送用戶列表，刷新break;catch (exception e)/system.out.printin(e); 亠/ *向所有人發(fā)送消息

49、* *向所有人發(fā)送用戶的列表*/4. 1. 4 porconf java該類繼承自jdialog,是用戶對(duì)服務(wù)器端偵聽(tīng)端口進(jìn)行修改配置的類。主要實(shí) 現(xiàn)方法源代碼如下：/ *生成端口設(shè)置對(duì)話框的類*/public class portconf extends jdialog jpanel panelport = new jpanel();jbutton save = new jbutton();jbutton cancel = new jbutton(); public static jlabel dlginfo=new jlabel ("默認(rèn)端口號(hào)為：8888”)； jpanel p

50、anelsave = new jpanel();jlabel message = new jlabel(); public static jtextfield portnumber ;public portconf(jframe frame) super(frame, true);try jblnit ();catch (exception e) eprintstacktrace();/設(shè)置運(yùn)行位置，使對(duì)話框居中private void jblnit () throws exception this.setsize(new dimension(300, 120); this . settitl

51、e ("端口設(shè)置");message . settext ("請(qǐng)輸入偵聽(tīng)的端口號(hào)：; portnumber = new jtextfield(10); portnumber.settext(n n + server.port); save settext (”保存”); cancel. settext ("取消”);panelportsetlayout(new flowlayout();panelport.add(message); panelportadd(portnumber);panelsave - add (new label (,f,!);pa

52、nelsave.add(save);panelsave.add(cancel);panelsave . add (new label (11n );container contentpane = getcontentpane(); contentpanesetlayout(new borderlayout();contentpaneadd (panelportz borderlayoutnor th); contentpaneadd(dlginfo, borderlayoutcenter);contentpane.add(panelsave, borderlayoutsouth);/保存按鈕的

53、事件處理saveaddactionlistener (new actionlistener()public void actionperformed (actionevent a) int saveport;trysaveport=integer.parselnt(portconf.portnumber.gettext();if (saveport<1 | | saveport>65535) portconf. dlginfo. set tex t ( ”偵聽(tīng) 端口必須是0-65535之間的整數(shù)！ ”);portconf.portnumber.settext(”);return;

54、server.port = saveport; dispose (); catch(numberformatexception e)portconf . dlginfo. settext錯(cuò)誤的端口 號(hào)，端口號(hào)請(qǐng)?zhí)顚懻麛?shù)！”)；portconf .portnumber. settext ( n 11); return;);/關(guān)閉對(duì)話框時(shí)的操作thisaddwindowli stener(new windowadapter() public void windowclosing(windowevent e) dlginfo. settext (n 默認(rèn)端 口號(hào)為:8888n);)；/収消按鈕的事件處理cancel.addactionlistener(new actionlistener() public void actionperformed(actionevent e) dlgtnfo. settext (” 默認(rèn)端口號(hào)為:8888n); dispose ();)；4. 1. 5 node, java用戶鏈表節(jié)點(diǎn)類，定義了鏈表小的用戶。主要實(shí)現(xiàn)方法源代碼如下：/ *用戶鏈表的結(jié)點(diǎn)類