Java聊天室
来源：互联网 发布：linux apt-get卸载 编辑：程序博客网 时间：2024/05/20 19:32
我的第一篇博客！过去的一周，应老师要求，用java编写了一个聊天室的程序，今天上午刚刚验收结束，自己对这个程序还算满意。本科阶段没有养成做完项目写报告写博客的好习惯，现在要读研了，秉承着助人为乐和帮助自己梳理思绪的初衷，决定以后多写些博客记录一下自己的学习和生活。
废话不多说了，直接上干货。程序实现了登陆、退出、单聊、群聊、预定义文字表情、在线用户查询、历史记录查询等功能，有命令行和图形界面两个版本，在文章的下面会附上代码。编写这个程序我用到了Git（版本控制，老师要求使用，大家编程时也可以不用）、Socket、IO、字符串处理、多线程、线程安全、容器、异常处理、AWT/Swing等知识。不过由于这是我用java编写的第一个程序（HelloWorld就不算了），我知道程序虽然能够运行，但其中异常处理和GUI等一些方面我做得还不是很好，也希望路过的大神们能不吝赐教。
效果图
服务器程序
ChatServer.java
package chatroom.server;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;import java.util.Map;import java.util.concurrent.ConcurrentHashMap;/** * * @author lqshanshuo */public class ChatServer { public static void main(String[] args) { int port =12345;//TCP端口号 ServerSocket serverSocket=null;//声明服务器ServerSocket类 try{ serverSocket = new ServerSocket(port);//创建服务器 Map<Socket,String> socketMap=new ConcurrentHashMap();//创建同步的Map存放连接状态的客户端及其用户名 while (true) { Socket socket = serverSocket.accept();//阻塞等待客户端连接 try{ new Mult(socket,socketMap);//为刚连接的客户端创建单独线程 }catch(IOException e){ socket.close();//线程启动故障 } } }catch(IOException e){ System.out.println("Server starting failed");//服务器创建故障 } }}Mult.java
package chatroom.server;import java.io.*;import java.net.*;import java.util.List;import java.util.Map;/** * * @author lqshanshuo */class Mult extends Thread { private Socket socket; private Map<Socket,String> socketMap; private DataOutputStream dos; private DataInputStream dis; String strName[]=null; public Mult(Socket s,Map<Socket,String> sM) throws IOException{ socket = s; socketMap=sM; //用于向客户端发送数据的输出流 dos = new DataOutputStream(socket.getOutputStream()); //用于接收客户端发来的数据的输入流 dis = new DataInputStream(socket.getInputStream()); start(); } public void run(){ try{ //登录检测 dos.writeUTF("Please login:"); while(true){ String str = dis.readUTF(); strName = str.split(" +"); if(str.startsWith("/login")&&(strName.length>1)) { //检测用户名是否重复 int nameUsed = 0; for(Socket s:socketMap.keySet()){ if(strName[1].equals(socketMap.get(s))){ nameUsed = 1; } } if(nameUsed==1){ dos.writeUTF("This name has been used.Please choose another."); }else{ //链接成功，将用户信息存入Map，并通知所有用户有人上线了 System.out.println(strName[1]+" has connected successfully"); socketMap.put(socket, strName[1]); dos.writeUTF("You have logined."); for(Socket s:socketMap.keySet()){ if(!s.equals(socket)){ dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF(strName[1]+" has logined."); } } break; } } dos.writeUTF("Invalid command."); } while(true){ //开始聊天 int noticeNum=0; String str = dis.readUTF(); if("/quit".equals(str))//检测是否退出 { System.out.println(strName[1]+" has finished"); break; }else if("/who".equals(str)){//为用户提供查看当前所有在线用户服务 dos = new DataOutputStream(socket.getOutputStream()); for(Socket s:socketMap.keySet()){ dos.writeUTF(socketMap.get(s)); } dos.writeUTF("Total online user:"+String.valueOf(socketMap.size())); }else{ //消息处理（判断1群聊还是私聊2是否发送表情） for(Socket s:socketMap.keySet()){ if((str.contains(socketMap.get(s)))&&(str.indexOf(socketMap.get(s))>0)&&('@'==str.charAt(str.indexOf(socketMap.get(s))-1))){ if(!str.startsWith("//")){ dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF(strName[1]+" says to you: "+str.replace("@"+socketMap.get(s), "")); }else{ dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF(strName[1]+" says to you: "+emotion(str,socketMap.get(s))); } if(noticeNum<1){ if(!str.startsWith("//")){ dos = new DataOutputStream(socket.getOutputStream()); dos.writeUTF("you says to "+socketMap.get(s)+": "+str.replace("@"+socketMap.get(s), "")); }else{ dos = new DataOutputStream(socket.getOutputStream()); dos.writeUTF("you says to "+socketMap.get(s)+": "+emotion(str,socketMap.get(s))); } } noticeNum++; } } if(noticeNum<1){ for(Socket s:socketMap.keySet()){ if(!s.equals(socket)){ if((str.startsWith("//"))&&(str.contains("@all"))){ dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF(strName[1]+" says to all: "+emotion(str,"all")); }else{ dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF(strName[1]+" says to all: "+str); } }else{ if((str.startsWith("//"))&&(str.contains("@all"))){ dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF(strName[1]+" says to all: "+emotion(str,"all")); }else{ dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF("You says to all: "+str); } } } } noticeNum=0; } } socketMap.remove(this.socket); socket.close(); }catch(IOException e){ //System.out.println("lala"+e.getMessage()); } } public String emotion(String cc,String str){ //预定义表情 char c=cc.charAt(2); if("all".equals(str)){ if('G'==c) return("Hello everybody~"); else if('A'==c) return("I hate all of you!"); else if('B'==c) return("It's time for me to leave,bye-bye."); else return("There is no perset emotion for your words."); }else{ if('G'==c) return("Nice to meet you,"+str+"."); else if('A'==c) return(str+",you make me angry!"); else if('B'==c) return(str+"I look forward to talk with you next time,goodbye."); else return("There is no perset emotion for your words."); } }}客户端程序(命令行版)
ChatClient.java
package chatroom.client;import java.io.*;import java.io.IOException;import static java.lang.Thread.sleep;import java.net.ServerSocket;import java.net.Socket;/** * * @author lqshanshuo */public class ChatClient { public static void main(String[] args){ String hostName = "localhost"; int portNumber = 12345; Socket socket=null;//声明Socket类 try { try{ socket = new Socket(hostName,portNumber);//新建socket连接 }catch(Exception e){ System.out.println("Connection failed!"); } //获取用户键盘输入字符流 BufferedReader userInput = new BufferedReader(new InputStreamReader(System.in)); //获取输出流，用于客户端向服务器端发送数据 DataOutputStream dos = new DataOutputStream(socket.getOutputStream()); //本地创建文本文件存储历史记录 String historyFileName; do{ historyFileName=""+(int)(Math.random()*100000); }while(new File("./history/"+historyFileName+".txt").exists()); File f = new File("./history/"+historyFileName+".txt"); PrintWriter history = new PrintWriter(new FileWriter(f,true)); try{ new ReceiveThread(socket,history);//创建单独线程接收服务器信息 }catch(IOException e){ socket.close(); f.delete(); System.out.println("Receive Thread start failed!This socket is closed."); } while(true){ //获取用户键盘输入 String str = userInput.readLine(); try{sleep(1);}catch(Exception e){System.out.println(e.getMessage());} //历史记录功能 if(str.startsWith("/history")){ String[] strSplit=str.split(" +"); BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f))); String lineTxt = null; int i=0,sign=0; System.out.println("-------------history-------------"); if(strSplit.length==1){//无参数时默认显示50条历史记录 while((lineTxt = br.readLine()) != null){ i++; if(i<=50){ System.out.println(i+"."+lineTxt); sign=1; } } } if(strSplit.length==2){//可选参数，从第几条开始显示 while((lineTxt = br.readLine()) != null){ i++; if(i>=Integer.valueOf(strSplit[1])){ System.out.println(i+"."+lineTxt); sign=1; } } } if(strSplit.length==3){//可选参数，一共显示多少条 while((lineTxt = br.readLine()) != null){ i++; if(i>=(Integer.valueOf(strSplit[1]))+(Integer.valueOf(strSplit[2]))) break; if(i>=Integer.valueOf(strSplit[1])){ System.out.println(i+"."+lineTxt); sign=1; } } } if(sign==0) System.out.println("No history meet the requirements");//无满足要求历史记录 System.out.println("------------------------------------"); }else{ dos.writeUTF(str); if("/quit".equals(str)){//退出 System.out.println("quit!!!!!!!!!!!!!!!"); f.delete(); break; } } } socket.close(); }catch(IOException e){ System.out.println(e.getMessage()); } }}ReceiveThread.java
package chatroom.client;import java.io.*;import java.net.*;/** * * @author lqshanshuo */class ReceiveThread extends Thread{ private Socket socket; private PrintWriter history; private DataInputStream dis; public ReceiveThread(Socket s,PrintWriter h) throws IOException{ socket = s; history = h; dis = new DataInputStream(socket.getInputStream()); start(); } public void run(){ try{ while(true){ String strTemp=dis.readUTF();//读取服务器发送来的内容 System.out.println(strTemp);//显示在屏幕上 history.println(strTemp);//存在历史记录里 history.flush(); } }catch(IOException e){ //System.out.println("ReceiveThread is over."); } }}客户端程序（图形界面版）
ChatroomJFrame.java
package chatroom.client;import java.awt.BorderLayout;import java.awt.Container;import java.awt.event.ActionEvent;import java.io.BufferedReader;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;import javax.swing.JDialog;import javax.swing.JLabel;import javax.swing.JRadioButton;/** * * @author lqshanshuo */public class ChatroomJFrame extends javax.swing.JFrame { File f=null; DataOutputStream dos=null; DataInputStream dis=null; Socket socket=null; public void connect(){ String hostName = "localhost"; int portNumber = 12345; try { try{ socket = new Socket(hostName,portNumber); }catch(Exception e){ System.out.println("Connection failed!"); } //获取输出流，用于客户端向服务器端发送数据 dos = new DataOutputStream(socket.getOutputStream()); //获取输入流，用于接收服务器端发送来的数据 dis = new DataInputStream(socket.getInputStream()); String historyFileName; do{ historyFileName=""+(int)(Math.random()*100000); }while(new File("./history/"+historyFileName+".txt").exists()); f = new File("./history/"+historyFileName+".txt"); PrintWriter history = new PrintWriter(new FileWriter(f,true)); try{ new ReceiveThread1(this,socket,history); }catch(IOException e){ socket.close(); f.delete(); System.out.println("Receive Thread start failed!This socket is closed."); } }catch(IOException e){ System.out.println(e.getMessage()); } } public int send(String str){ //try{sleep(1);}catch(Exception e){System.out.println(e.getMessage());} if(str.startsWith("/history")){ try{ String[] strSplit=str.split(" +"); BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f))); String lineTxt = null; int i=0,sign=0; jTextArea1.append("-------------history-------------"+"\n"); if(strSplit.length==1){ while((lineTxt = br.readLine()) != null){ i++; if(i<=50){ jTextArea1.append(i+"."+lineTxt+"\n"); sign=1; } } } if(strSplit.length==2){ while((lineTxt = br.readLine()) != null){ i++; if(i>=Integer.valueOf(strSplit[1])){ jTextArea1.append(i+"."+lineTxt+"\n"); sign=1; } } } if(strSplit.length==3){ while((lineTxt = br.readLine()) != null){ i++; if(i>=(Integer.valueOf(strSplit[1]))+(Integer.valueOf(strSplit[2]))) break; if(i>=Integer.valueOf(strSplit[1])){ jTextArea1.append(i+"."+lineTxt+"\n"); sign=1; } } } if(sign==0) jTextArea1.append("No history meet the requirements"+"\n"); jTextArea1.append("------------------------------------"+"\n"); }catch(IOException e){System.out.println(e.getMessage());} }else{ try{ dos.writeUTF(str);}catch(IOException e){System.out.println(e.getMessage());} if("/quit".equals(str)){ jTextArea1.append("quit!!!!!!!!!!!!!!!"+"\n"); f.delete(); return 0; } } return 1; } public void receive(String str){ jTextArea1.append(str+"\n"); jTextArea1.setCaretPosition(jTextArea1.getText().length()); } public ChatroomJFrame() { initComponents(); } @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { buttonGroup1 = new javax.swing.ButtonGroup(); jButton1 = new javax.swing.JButton(); jTextField1 = new javax.swing.JTextField(); jScrollPane1 = new javax.swing.JScrollPane(); jTextArea1 = new javax.swing.JTextArea(); jPanel1 = new javax.swing.JPanel(); jRadioButton1 = new javax.swing.JRadioButton(); jRadioButton2 = new javax.swing.JRadioButton(); jRadioButton3 = new javax.swing.JRadioButton(); jRadioButton4 = new javax.swing.JRadioButton(); jButton2 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle("ChatRoom"); addWindowListener(new java.awt.event.WindowAdapter() { public void windowClosing(java.awt.event.WindowEvent evt) { formWindowClosing(evt); } }); jButton1.setText(" send "); jButton1.setToolTipText(""); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); jTextField1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jTextField1ActionPerformed(evt); } }); jTextArea1.setEditable(false); jTextArea1.setColumns(20); jTextArea1.setRows(5); jScrollPane1.setViewportView(jTextArea1); buttonGroup1.add(jRadioButton1); jRadioButton1.setText("Greet"); jRadioButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jRadioButton1ActionPerformed(evt); } }); buttonGroup1.add(jRadioButton2); jRadioButton2.setText("Angry"); jRadioButton2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jRadioButton2ActionPerformed(evt); } }); buttonGroup1.add(jRadioButton3); jRadioButton3.setText("Goodbye"); jRadioButton3.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jRadioButton3ActionPerformed(evt); } }); buttonGroup1.add(jRadioButton4); jRadioButton4.setSelected(true); jRadioButton4.setText("Null"); jRadioButton4.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jRadioButton4ActionPerformed(evt); } }); jButton2.setText("help"); jButton2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton2ActionPerformed(evt); } }); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jRadioButton1) .addComponent(jRadioButton2) .addComponent(jRadioButton3) .addComponent(jRadioButton4)) .addGap(0, 8, Short.MAX_VALUE)) .addGroup(jPanel1Layout.createSequentialGroup() .addContainerGap() .addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addContainerGap()) ); jPanel1Layout.setVerticalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addComponent(jRadioButton1) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jRadioButton2) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jRadioButton3) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jRadioButton4) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton2) .addGap(0, 84, Short.MAX_VALUE)) ); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 302, Short.MAX_VALUE) .addComponent(jTextField1)) .addGap(17, 17, 17) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) .addContainerGap()) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addGap(24, 24, 24) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jScrollPane1) .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton1)) .addContainerGap()) ); pack(); }// </editor-fold> private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { String str = jTextField1.getText(); jTextArea1.append(str+"\n"); jTextField1.setText(""); if(send(str)==0) try{ socket.close(); }catch(IOException e){System.out.println(e.getMessage());} } private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) { String str = jTextField1.getText(); jTextArea1.append(str+"\n"); jTextField1.setText(""); if(send(str)==0) try{ socket.close(); }catch(IOException e){System.out.println(e.getMessage());} } private void formWindowClosing(java.awt.event.WindowEvent evt) { f.delete(); send("/quit"); } private void jRadioButton2ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText("//Angry! @"); } private void jRadioButton1ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText("//Greet! @"); } private void jRadioButton3ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText("//Goodbye! @"); } private void jRadioButton4ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(""); } private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) { JDialog dialog = new JDialog(); dialog.setTitle("help"); dialog.setSize(450,170); Container contentPane = dialog.getContentPane(); contentPane.add(new JLabel( "<html>/login xxx: login and use 'xxx' as username.<br/>" + "/who        : show all online users.<br/>" + "/history   : show history.<br/>" + "/quit        : quit this chatroom.<br/><br/>" + "click on the right RadioButton for send emotins or send '//XXX@xxx'.<html>" ,JLabel.CENTER),BorderLayout.CENTER); dialog.setVisible(true); } public static void main(String args[]) { /* Set the Nimbus look and feel */ //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(ChatroomJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(ChatroomJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(ChatroomJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(ChatroomJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //</editor-fold> /* Create and display the form */ final ChatroomJFrame chatroomJFrame=new ChatroomJFrame(); java.awt.EventQueue.invokeLater(new Runnable() { public void run() { chatroomJFrame.setVisible(true); } }); chatroomJFrame.jPanel1.setVisible(true); chatroomJFrame.connect(); } // Variables declaration - do not modify private javax.swing.ButtonGroup buttonGroup1; private javax.swing.JButton jButton1; private javax.swing.JButton jButton2; private javax.swing.JPanel jPanel1; private javax.swing.JRadioButton jRadioButton1; private javax.swing.JRadioButton jRadioButton2; private javax.swing.JRadioButton jRadioButton3; private javax.swing.JRadioButton jRadioButton4; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JTextArea jTextArea1; private javax.swing.JTextField jTextField1; // End of variables declaration }ReveiveThread1.java
package chatroom.client;import java.io.*;import java.net.*;/** * * @author lqshanshuo */class ReceiveThread1 extends Thread{ private ChatroomJFrame chatroomJFrame; private Socket socket; private PrintWriter history; private DataInputStream dis; public ReceiveThread1(ChatroomJFrame c,Socket s,PrintWriter h) throws IOException{ chatroomJFrame = c; socket = s; history = h; dis = new DataInputStream(socket.getInputStream()); start(); } public void run(){ try{ while(true){ String strTemp=dis.readUTF(); chatroomJFrame.receive(strTemp); history.println(strTemp); history.flush(); } }catch(IOException e){ //System.out.println("ReceiveThread is over."); } }} 0 0
- java聊天室
- java 聊天室
- Java聊天室
- java 聊天室
- java 聊天室
- java聊天室
- Java聊天室
- Java 聊天室
- 聊天室--java socket
- JAVA版聊天室
- java 语音聊天室
- 网络聊天室(Java)
- 简单的java聊天室
- java聊天室代码
- java 语音聊天室
- JAVA 的聊天室程序
- JAVA网络聊天室程序
- 練手小項目一：JAVA聊天室源代码
- Android中的观察者DataSetObservable和DataSetObserver
- linux修改字体
- 用循环语句输出菱形图形
- win7下IE8浏览器oracle ebs 11i打不开FORM的解决方案
- 如何理解数据库理论中的第一二三四五六七八范式？
- Java聊天室
- 第2周项目初见对象--时间类（2）
- POJ3411 Paid Roads DFS
- 创建rpm包
- JavaBean使用实例——注册验证
- BZOJ 2466 中山市选2009 树 高斯消元+暴力
- reiserfs分区配置
- 对于理解spring非常重要的一段话
- Python内存管理机制
