新手练练----也做即时通信系统（1）

实践出真知，还得要多动手才行。今天做的放上来，实现了客户端的登陆功能，慢慢加功能，锻炼自己的j2se水平。。。功能太简单了（本人水平有限^o^)。
（一）客户端：
login.java

packagevitaminclient;

importjava.awt.*;

importjavax.swing.*;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjava.awt.event.WindowEvent;
importjava.awt.event.WindowAdapter;
importjava.net.*;
importjava.io.*;
importjava.util.*;


/***//**
*<p>Title:</p>
*
*<p>Description:</p>
*
*<p>Copyright:Copyright(c)2006</p>
*
*<p>Company:</p>
*
*@authornotattributable
*@version1.0
*/
publicclassLoginextendsJFrame
{
privateStringuserName="";//用户名
privateStringpassword="";//密码
privateSocketsocket=null;//客户端socket
privatejava.io.BufferedReaderin=null;//读数据的
privatejava.io.PrintWriterout=null;//向服务器写数据
privatestaticfinalintSeverPort=6018;//服务器端口
privateStringclientCmd="";
privateStringserverMsg="";

publicLogin(){
try{
jbInit();
}catch(Exceptionexception){
exception.printStackTrace();
}
}

privatevoidjbInit()throwsException{
getContentPane().setLayout(null);
jPanel1.setBounds(newRectangle(0,0,435,327));
jPanel1.setLayout(null);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setResizable(false);
this.setTitle("登陆");


btnLogin.addActionListener(newLogin_btnLogin_actionAdapter(this));
btnReset.addActionListener(newLogin_btnReset_actionAdapter(this));

this.getContentPane().add(jPanel1);
tfName.setBounds(newRectangle(139,75,178,41));
jLabel2.setText("密码：");
jLabel2.setBounds(newRectangle(56,162,74,38));
tfPassword.setBounds(newRectangle(137,156,182,41));
btnLogin.setBounds(newRectangle(90,254,87,32));
btnLogin.setText("登陆");
btnReset.setBounds(newRectangle(238,251,84,34));
btnReset.setText("重置");
jPanel1.add(jLabel1);
jPanel1.add(jLabel2);
jPanel1.add(tfName);
jPanel1.add(tfPassword);
jPanel1.add(btnLogin);
jPanel1.add(btnReset);
jLabel1.setText("用户名:");
jLabel1.setBounds(newRectangle(56,76,71,38));
this.setLocation(310,200);
this.setSize(400,400);
}

publicstaticvoidmain(String[]args){
Loginlogin=newLogin();
login.setVisible(true);
}

JPaneljPanel1=newJPanel();
JLabeljLabel1=newJLabel();
JTextFieldtfName=newJTextField();
JLabeljLabel2=newJLabel();
JPasswordFieldtfPassword=newJPasswordField();
JButtonbtnLogin=newJButton();
JButtonbtnReset=newJButton();
publicvoidbtnLogin_actionPerformed(ActionEvente)
{//用户登陆
intnumRead;
if(tfName.getText().trim().length()==0)
{
javax.swing.JOptionPane.showMessageDialog(this,"请输入用户名!!!","用户登陆",JOptionPane.WARNING_MESSAGE);
return;
}
if(tfPassword.getPassword().length==0)
{
javax.swing.JOptionPane.showMessageDialog(this,"请输入密码!!!","用户登陆",JOptionPane.WARNING_MESSAGE);
return;
}
this.userName=tfName.getText().trim();//获取用户名
this.password=String.valueOf(tfPassword.getPassword());//获取密码
this.clientCmd="login"+this.userName+""+this.password;

//this.clientCmd="login";
try
{
this.socket=newSocket(InetAddress.getLocalHost(),SeverPort);//连接服务器
this.in=newBufferedReader(newInputStreamReader(socket.getInputStream()));//从服务器读数据的
this.out=newPrintWriter(newBufferedWriter(newOutputStreamWriter(socket.getOutputStream())),true);//向数据库写数据的
out.println(this.clientCmd);

this.serverMsg=in.readLine();
if(this.serverMsg.equals(newString("LoginBad")))
{
javax.swing.JOptionPane.showMessageDialog(this,"登陆失败!!!");
return;
}
elseif(this.serverMsg.equals(newString("LoginGood")))
{
vitaminclient.clientMaincm=newclientMain();
cm.setSize(200,500);
cm.setVisible(true);
this.dispose();

}

}
catch(java.io.IOExceptionex)
{
System.err.println(ex.getMessage().toString());
ex.printStackTrace();
}
catch(java.lang.Exceptionex)
{
System.err.println(ex.getMessage().toString());
ex.printStackTrace();
}
}
publicvoidbtnReset_actionPerformed(ActionEvente){
this.tfName.setText("");
this.tfPassword.setText("");
}

}


classLogin_btnReset_actionAdapterimplementsActionListener{
privateLoginadaptee;
Login_btnReset_actionAdapter(Loginadaptee){
this.adaptee=adaptee;
}

publicvoidactionPerformed(ActionEvente){
adaptee.btnReset_actionPerformed(e);
}
}







classLogin_btnLogin_actionAdapterimplementsActionListener{
privateLoginadaptee;
Login_btnLogin_actionAdapter(Loginadaptee){
this.adaptee=adaptee;
}

publicvoidactionPerformed(ActionEvente){
adaptee.btnLogin_actionPerformed(e);
}
}

clientMain.java(开发中。。。）

（二）服务器端
数据库用的是Access,图个简单，反正是做着练手用的，能偷懒就尽量吧。。。。
业务逻辑和数据访问分开的，数据访问我封装了一个javaBean类来实现：
DBbase.java

packagecom.vitamin.DataAccess;

importjava.sql.*;

publicclassDBbase{
StringsDBDriver="sun.jdbc.odbc.JdbcOdbcDriver";
StringsConnstr="jdbc:odbc:myDB";
Connectionconnect=null;
ResultSetrs=null;
Statementstmt=null;


publicDBbase()
{

try
{

Class.forName(sDBDriver);

}
catch(ClassNotFoundExceptionex)
{
System.err.println(ex.getMessage());

}
}
publicResultSetexecuteQuery(Stringsql)
{

try
{
this.connect=DriverManager.getConnection(sConnstr);
this.stmt=this.connect.createStatement();
rs=stmt.executeQuery(sql);
}
catch(SQLExceptionex)
{
System.err.println(ex.getMessage());
}
returnrs;
}
publicintexecuteUpdate(Stringsql)
{
intresult=0;
try
{
this.connect=DriverManager.getConnection(sConnstr);
this.stmt=this.connect.createStatement();
result=stmt.executeUpdate(sql);
}
catch(SQLExceptionex)
{
System.err.println(ex.getMessage());
}
returnresult;
}

}

服务器端
为了简单，连GUI都不弄了，等后期再来完善吧，先把主要功能做出来再说：
server.java

packagecom.vitamin.vitaminserver;

importjava.net.*;
importjava.io.*;

/***//**
*<p>Title:</p>
*
*<p>Description:</p>
*
*<p>Copyright:Copyright(c)2006</p>
*
*<p>Company:</p>
*
*@authornotattributable
*@version1.0
*/
publicclassserver
{



publicstaticvoidmain(String[]args)throwsjava.io.IOException
{
java.net.ServerSockets=newServerSocket(6018);
System.out.println("服务器启动:"+s);
try
{
while(true)
{
java.net.Socketsocket=s.accept();
System.out.println("连接接受"+socket);
try
{
newServerThread(socket);
}
catch(java.io.IOExceptionex)
{
socket.close();
}

}
}
catch(java.lang.Exceptionex)
{
System.err.println(ex.getMessage().toString());
ex.printStackTrace();
}
finally
{
s.close();
}

}




}

ServerThread.java

packagecom.vitamin.vitaminserver;

importjava.io.*;
importjava.net.*;
importjava.util.*;
importcom.vitamin.DataAccess.*;


/***//**
*<p>Title:</p>
*
*<p>Description:</p>
*
*<p>Copyright:Copyright(c)2006</p>
*
*<p>Company:</p>
*
*@authornotattributable
*@version1.0
*/
publicclassServerThreadextendsjava.lang.Thread
{
privatejava.net.Socketsocket=null;
privatejava.io.BufferedReaderin=null;//读数据的
privatejava.io.PrintWriterout=null;//向客户写数据
privateStringclientMsg="";
privateStringsql="";
privatejava.sql.ResultSetrs=null;

publicServerThread()
{
super();
}
publicServerThread(Sockets)throwsjava.io.IOException
{
this.socket=s;
this.in=newBufferedReader(newInputStreamReader(this.socket.getInputStream()));
this.out=newPrintWriter(newBufferedWriter(newOutputStreamWriter(this.socket.getOutputStream())),true);
this.start();//启动线程
}

publicvoidrun()
{
String[]msgTmp;
Stringspliter="";
try
{
while(true)
{
this.clientMsg=in.readLine();
System.out.println(this.clientMsg);
msgTmp=this.clientMsg.split(spliter);
System.out.println(msgTmp[0]);
if(msgTmp[0].equals(newString("login")))
{
Stringname="";
Stringpwd="";
System.out.println(this.clientMsg);
name=msgTmp[1];
pwd=msgTmp[2];
com.vitamin.DataAccess.DBbasemyDb=newDBbase();
this.sql="selectcount(*)ascountfromuserswhereusername='"+name+"'andpassword='"
+pwd+"'";
this.rs=myDb.executeQuery(this.sql);
intresult=0;
if(rs.next())
{
result=rs.getInt("count");
}
if(result>=1)
{
this.out.println("LoginGood");
}
else
{
this.out.println("LoginBad");
}


}
else
{


}

}
}
catch(java.lang.Exceptionex)
{
System.out.println(ex.getMessage().toString());
ex.printStackTrace();
}
try{
this.socket.close();
}catch(IOExceptionex1){
}
}
}

运行结果：




自己水平有限，做的这个小东西实在拿不出手，但还是对自己有些帮助，我会继续努力的，