请问Show, Showdialog, Run ,Dispose作用？

json_001 2006-05-26 10:59:16
1.
什么时候用
Application.Run(form);
什么时候用
form.Show(), form.Showdialog()
请说说区别及为什么这么用。

2.
Dispose 的作用是什么，它能保证对象被析构吗？
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Yellow198267 2006-05-26
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Show是你打开非模态对话框的时候用，它不阻塞当前线程
Showdialog相反。
Application.Run(form);一般是应用程序主窗体用
Dispose 释放资源，能不能保证资源释放就要看你的代码和gc了

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正解~~~~~
diandian82 2006-05-26
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Show是你打开非模态对话框的时候用，它不阻塞当前线程
Showdialog相反。
Application.Run(form);一般是应用程序主窗体用
Dispose 释放资源，能不能保证资源释放就要看你的代码和gc了
json_001 2006-05-26
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呵呵，我希望有人说说，那个上面的我觉得的不太通俗。
Firestone2003 2006-05-26
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MSDN上有比较详细的解释，按照你的问题搜索就行了
zhzh75370782 2006-05-26
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查MSDN吧
liujiwe79 2006-05-26
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Show打开非模态对话框，它不阻塞当前线程
Showdialog打开模态对话框。
Application.Run(form);一般是应用程序主窗体用,在main方法中用
Dispose 释放资源，能不能保证资源释放就要看你的代码和gc了
Magic_kui_asd 2006-05-26
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说白了form.Showdialog()：必须先关掉本窗口后才可以处理其他窗口
form.Show()：可以随便处理显示的任何窗口即其他窗口
Application.Run（）方法：在当前线程上开始运行标准应用程序消息循环（我也不太明白），一般是应用程序主窗体（就是首先出现的窗体）用。
Dispose 用于释放资源。
C# winform主界面打开并关闭登录界面的方法
在winform 界面编程中，我们有时候要在主界面打开之前先显示登录界面，当登录界面用户信息校验正确后才打开主界面，而这时登陆界面也完成使命该功成身退了。 目前有两种方法可实现： 方法1. 隐藏登录界面 Program.cs 中代码如下： /// /// 应用程序的主入口点。 /// [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefaul
C#+sql宿舍管理系统
using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Data.OleDb; namespace DormMIS { /// /// Form1 的摘要说明。 /// public class Login : System.Windows.Forms.Form { private System.Windows.Forms.Button btClose;//取消按钮 private System.Windows.Forms.Button btAdd; private System.Windows.Forms.TextBox password; private System.Windows.Forms.TextBox name; private System.Windows.Forms.Label label3; private System.Windows.Forms.Label label2; private System.Windows.Forms.Label label1; /// /// 必需的设计器变量。 /// private System.ComponentModel.Container components = null; private OleDbConnection oleConnection1 = null; public Login() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); this.oleConnection1=new OleDbConnection(DormMIS.database.dbConnection.connection); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } /// /// 清理所有正在使用的资源。 /// protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows 窗体设计器生成的代码 /// /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// private void InitializeComponent() { System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Login)); this.btClose = new System.Windows.Forms.Button(); this.btAdd = new System.Windows.Forms.Button(); this.password = new System.Windows.Forms.TextBox(); this.name = new System.Windows.Forms.TextBox(); this.label3 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.label1 = new System.Windows.Forms.Label(); this.SuspendLayout(); // // btClose // this.btClose.FlatStyle = System.Windows.Forms.FlatStyle.Popup; this.btClose.ForeColor = System.Drawing.Color.Black; this.btClose.Location = new System.Drawing.Point(168, 156); this.btClose.Name = "btClose"; this.btClose.Size = new System.Drawing.Size(75, 23); this.btClose.TabIndex = 20; this.btClose.Text = "取消"; this.btClose.Click += new System.EventHandler(this.btClose_Click); // // btAdd // this.btAdd.FlatStyle = System.Windows.Forms.FlatStyle.Popup; this.btAdd.ForeColor = System.Drawing.Color.Black; this.btAdd.Location = new System.Drawing.Point(48, 156); this.btAdd.Name = "btAdd"; this.btAdd.Size = new System.Drawing.Size(75, 23); this.btAdd.TabIndex = 19; this.btAdd.Text = "确定"; this.btAdd.Click += new System.EventHandler(this.btAdd_Click); // // password // this.password.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.password.Location = new System.Drawing.Point(128, 116); this.password.Name = "password"; this.password.PasswordChar = '*'; this.password.Size = new System.Drawing.Size(100, 21); this.password.TabIndex = 18; this.password.Text = "admin"; // // name // this.name.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.name.Location = new System.Drawing.Point(128, 76); this.name.Name = "name"; this.name.Size = new System.Drawing.Size(100, 21); this.name.TabIndex = 17; this.name.Text = "admin"; this.name.TextChanged += new System.EventHandler(this.name_TextChanged); // // label3 // this.label3.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.label3.ForeColor = System.Drawing.Color.Black; this.label3.Location = new System.Drawing.Point(64, 116); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(56, 23); this.label3.TabIndex = 16; this.label3.Text = "密 码"; // // label2 // this.label2.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.label2.ForeColor = System.Drawing.Color.Black; this.label2.Location = new System.Drawing.Point(64, 76); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(56, 23); this.label2.TabIndex = 15; this.label2.Text = "用户名"; // // label1 // this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 18F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.label1.ForeColor = System.Drawing.Color.Black; this.label1.Location = new System.Drawing.Point(40, 24); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(228, 28); this.label1.TabIndex = 14; this.label1.Text = "宿舍管理信息系统"; // // Login // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.BackColor = System.Drawing.Color.Ivory; this.ClientSize = new System.Drawing.Size(304, 210); this.Controls.Add(this.btClose); this.Controls.Add(this.btAdd); this.Controls.Add(this.password); this.Controls.Add(this.name); this.Controls.Add(this.label3); this.Controls.Add(this.label2); this.Controls.Add(this.label1); this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon"))); this.MaximizeBox = false; this.MinimizeBox = false; this.Name = "Login"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "登录"; this.Load += new System.EventHandler(this.Login_Load); this.ResumeLayout(false); this.PerformLayout(); } #endregion /// /// 应用程序的主入口点。 /// [STAThread] static void Main() { Application.Run(new Login()); } private void btAdd_Click(object sender, System.EventArgs e) { if(name.Text.Trim()==""||password.Text.Trim()=="") MessageBox.Show("请输入用户名和密码","提示"); else { oleConnection1.Open(); OleDbCommand cmd=new OleDbCommand("",oleConnection1); string sql="select * from userinfo where UName='"+name.Text.Trim()+"' and PWD='"+password.Text.Trim()+"'"; cmd.CommandText=sql; if (null!=cmd.ExecuteScalar()) { //隐藏登录窗口 this.Visible=false; //创建并打开主界面 Main main=new Main(); main.Tag=this.FindForm(); OleDbDataReader dr; cmd.CommandText=sql; dr=cmd.ExecuteReader(); dr.Read(); main.statusBarPanel2.Text=name.Text.Trim(); main.ShowDialog(); } else MessageBox.Show("用户名或密码错误","警告"); } oleConnection1.Close(); } private void btClose_Click(object sender, System.EventArgs e) { this.Close(); } private void name_TextChanged(object sender, EventArgs e) { } } }
C#100例题 献给c#初学者
给初学者的简单例题！ private System.ComponentModel.IContainer components; private const int kNumberOfRows = 8; private const int kNumberOfTries = 3; private int NumTotalBricks = 0; private int NumBalls = 0; private Ball TheBall = new Ball(); private Paddle ThePaddle = new Paddle(); private System.Windows.Forms.Timer timer1; private Row[] Rows = new Row[kNumberOfRows]; private Score TheScore = null; private Thread oThread = null; [DllImport("winmm.dll")] public static extern long PlaySound(String lpszName, long hModule, long dwFlags); public Form1() { // // Required for Windows Form Designer support // InitializeComponent(); for (int i = 0; i < kNumberOfRows; i++) { Rows[i] = new Row(i); } ThePaddle.Position.X = 5; ThePaddle.Position.Y = this.ClientRectangle.Bottom - ThePaddle.Height; TheBall.Position.Y = this.ClientRectangle.Bottom - 200; this.SetBounds(this.Left, this.Top, Rows[0].GetBounds().Width, this.Height); TheScore = new Score(ClientRectangle.Right - 50, ClientRectangle.Bottom - 180); // choose Level SpeedDialog dlg = new SpeedDialog(); if (dlg.ShowDialog() == DialogResult.OK) { timer1.Interval = dlg.Speed; } // // TODO: Add any constructor code after InitializeComponent call // } /// /// Clean up any resources being used. /// protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } private string m_strCurrentSoundFile = "BallOut.wav"; public void PlayASound() { if (m_strCurrentSoundFile.Length > 0) { PlaySound(Application.StartupPath + "\\" + m_strCurrentSoundFile, 0, 0); } m_strCurrentSoundFile = ""; oThread.Abort(); } public void PlaySoundInThread(string wavefile) { m_strCurrentSoundFile = wavefile; oThread = new Thread(new ThreadStart(PlayASound)); oThread.Start(); } #region Windows Form Designer generated code /// /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// private void InitializeComponent() { this.components = new System.ComponentModel.Container(); this.timer1 = new System.Windows.Forms.Timer(this.components); // // timer1 // this.timer1.Tick += new System.EventHandler(this.timer1_Tick); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(552, 389); this.KeyPreview = true; this.Name = "Form1"; this.Text = "Brick Out"; this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown); this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint); } #endregion /// /// The main entry point for the application. /// [STAThread] static void Main() { Application.Run(new Form1()); } private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { Graphics g = e.Graphics; g.FillRectangle(Brushes.White, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height); TheScore.Draw(g); ThePaddle.Draw(g); DrawRows(g); TheBall.Draw(g); } private void DrawRows(Graphics g) { for (int i = 0; i < kNumberOfRows; i++) { Rows[i].Draw(g); } } private void CheckForCollision() { if (TheBall.Position.X < 0) // hit the left side, switch polarity { TheBall.XStep *= -1; TheBall.Position.X += TheBall.XStep; PlaySoundInThread("WallHit.wav"); } if (TheBall.Position.Y this.ClientRectangle.Right - TheBall.Width ) // hit the left side, switch polarity { TheBall.XStep *= -1; TheBall.Position.X += TheBall.XStep; PlaySoundInThread("WallHit.wav"); } if (TheBall.Position.Y > this.ClientRectangle.Bottom - TheBall.YStep) // lost the ball! { IncrementGameBalls(); Reset(); PlaySoundInThread("BallOut.wav"); } if (RowsCollide(TheBall.Position)) { TheBall.YStep *= -1; PlaySoundInThread("BrickHit.wav"); } int hp = HitsPaddle(TheBall.Position); if (hp > -1)// lost the ball! { PlaySoundInThread("PaddleHit.wav"); switch (hp) { case 1: TheBall.XStep = -7; TheBall.YStep = -3; break; case 2: TheBall.XStep = -5; TheBall.YStep = -5; break; case 3: TheBall.XStep = 5; TheBall.YStep = -5; break; default: TheBall.XStep = 7; TheBall.YStep = -3; break; } } } private int HitsPaddle(Point p) { Rectangle PaddleRect = ThePaddle.GetBounds(); if (p.Y >= this.ClientRectangle.Bottom - (PaddleRect.Height + TheBall.Height) ) { if ((p.X > PaddleRect.Left) && (p.X PaddleRect.Left) && (p.X PaddleRect.Left + PaddleRect.Width/4) && (p.X PaddleRect.Left + PaddleRect.Width/2) && (p.X = kNumberOfTries) { timer1.Stop(); string msg = "Game Over\nYou knocked out " + NumTotalBricks; if (NumTotalBricks == 1) msg += " brick."; else msg += " bricks."; MessageBox.Show(msg); Application.Exit(); } } private void Reset() { TheBall.XStep = 5; TheBall.YStep = 5; TheBall.Position.Y = this.ClientRectangle.Bottom - 190; TheBall.Position.X = 5; timer1.Stop(); TheBall.UpdateBounds(); Invalidate(TheBall.GetBounds()); } private int SumBricks () { int sum = 0; for (int i = 0; i < kNumberOfRows; i++) { sum += Rows[i].BrickOut; } return sum; } private bool RowsCollide (Point p) { for (int i = 0; i < kNumberOfRows; i++) { if (Rows[i].Collides(TheBall.GetBounds())) { Rectangle rRow = Rows[i].GetBounds(); Invalidate(rRow); return true; } } return false; } private void timer1_Tick(object sender, System.EventArgs e) { TheBall.UpdateBounds(); Invalidate(TheBall.GetBounds()); TheBall.Move(); TheBall.UpdateBounds(); Invalidate(TheBall.GetBounds()); CheckForCollision(); NumTotalBricks = SumBricks(); TheScore.Count = NumTotalBricks; Invalidate(TheScore.GetFrame()); if (NumTotalBricks == kNumberOfRows*Row.kNumberOfBricks) { timer1.Stop(); MessageBox.Show("You Win! You knocked out all the bricks!"); Application.Exit(); } } private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) { string result = e.KeyData.ToString(); Invalidate(ThePaddle.GetBounds()); switch (result) { case "Left": ThePaddle.MoveLeft(); Invalidate(ThePaddle.GetBounds()); if (timer1.Enabled == false) timer1.Start(); break; case "Right": ThePaddle.MoveRight(ClientRectangle.Right); Invalidate(ThePaddle.GetBounds()); if (timer1.Enabled == false) timer1.Start(); break; default: break; } }
Java NIO 聊天室 JSwing
package com.ui.server; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class ServerBootFrame extends JFrame { /** * */ private static final long serialVersionUID = 1L; JPanel jp = new JPanel(new BorderLayout()); JPanel jp1 = new JPanel(new FlowLayout()); JScrollPane jsp1 = new JScrollPane(); JButton jbStart = new JButton("启动"); JButton jbEnd = new JButton("关闭"); JTextArea jtaState = new JTextArea(10, 25); Font font = new Font("Serif", Font.BOLD, 18); Color fore = Color.YELLOW; Color back = new Color(81, 217, 251); public ServerBootFrame(String title) { super(title); this.getContentPane().add(jp); jp.add(jsp1, "Center"); jsp1.getViewport().add(jtaState); jp.add(jp1, "South"); jp1.add(jbStart); jp1.add(jbEnd); jtaState.setFont(font); jtaState.setForeground(fore); jtaState.setBackground(back); jp1.setBackground(back); this.setResizable(false); this.setLocation(250, 250); } public void showFrame() { this.pack(); this.setVisible(true); } public void bootingServer(final BootEndInterface bt) { this.jbStart.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { bt.boot(); } }); } public void endingServer(final BootEndInterface ed) { this.jbEnd.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { ed.end(); } }); } public void closeWindow(final BootEndInterface ed) { this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e1) { ed.end(); } }); } public void appendStringTojtaState(String str) { jtaState.append(str); } } package com.ui.client; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.sql.*; public class LoginFrame extends JFrame { JLabel jUserName=new JLabel("用户姓名:"); JLabel jUserPsd=new JLabel("用户密码:"); JTextField txtUserName=new JTextField("",10); JPasswordField txtUserPsd=new JPasswordField(10); JButton okButton=new JButton("确定"); JButton regButton=new JButton("注册"); JPanel jp=new JPanel(new GridLayout(2,1)); JPanel jp1=new JPanel(new FlowLayout(FlowLayout.CENTER)); JPanel jp2=new JPanel(new FlowLayout(FlowLayout.LEFT)); JPanel jp3=new JPanel(new FlowLayout()); Font f=new Font("Serif",Font.BOLD,15); public LoginFrame() { super("用户登陆界面"); this.setLocation(250,250); this.getContentPane().add(jp,"Center"); this.getContentPane().add(jp3,"South"); jp.add(jp1);jp.add(jp2); jp1.add(jUserName);jp1.add(txtUserName); jp2.add(jUserPsd);jp2.add(txtUserPsd); jp3.add(okButton);jp3.add(regButton); txtUserName.setFont(f); txtUserPsd.setFont(f); txtUserPsd.setEchoChar('x'); txtUserName.setToolTipText("请输入用户名"); txtUserPsd.setToolTipText("请输入用户密码"); okButton.addActionListener(new SolveButtonEvent(1)); regButton.addActionListener(new SolveButtonEvent(2)); this.setResizable(false); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public void showWindow() { this.pack(); this.setVisible(true); } public void closeWindow() { this.dispose(); } public String getUserName() { return this.txtUserName.getText().trim(); } public String getUserPassword() { return new String(this.txtUserPsd.getPassword()); } class SolveButtonEvent implements ActionListener { int select=0; public SolveButtonEvent(int select) { this.select=select; } public void actionPerformed(ActionEvent e) { //int x=(int) LoginFrame.this.txtUserName.getLocationOnScreen().getX(); //int y=(int) LoginFrame.this.txtUserName.getLocationOnScreen().getY(); String userName=LoginFrame.this.getUserName(); String userPsd=LoginFrame.this.getUserPassword(); int nameLength=userName.length(); int psdLength=userPsd.length(); if(select==1) { if(nameLength>0 && psdLength>0 ) { if(LoginFrame.this.query(userName,userPsd)==true) { LoginFrame.this.closeWindow(); //new Client(); } else { MyDialog md=new MyDialog(LoginFrame.this,"提示窗口","错误!","用户名或密码错误.\n登陆失败"); md.showDialog(); } } else { if(nameLength==0) { MyDialog md=new MyDialog(LoginFrame.this,"提示窗口","提示","用户名不能为空"); md.showDialog(); } else if(psdLength==0) { MyDialog md=new MyDialog(LoginFrame.this,"提示窗口","提示","用户密码不能为空"); md.showDialog(); } } } else if(select==2) { RegisterFrame rf=new RegisterFrame(LoginFrame.this); rf.showWindow(); } } } public boolean query(String userName,String userPsd) { Connection conn=null; PreparedStatement psm=null; ResultSet rs=null; String sql="select * from user_manager where name=? and psd=?"; boolean result=false; try { Class.forName("oracle.jdbc.driver.OracleDriver"); conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xdf","scott","tiger"); psm=conn.prepareStatement(sql); psm.setString(1,userName); psm.setString(2,userPsd); rs=psm.executeQuery(); //rs结果集指向第一条记录的前一个位置 //如果第一条记录为空表示用户名或密码错误 if(rs.next()==true) { result=true; this.closeWindow(); } psm.close(); conn.close(); } catch(ClassNotFoundException e1){ e1.printStackTrace(); } catch(SQLException e2){ e2.printStackTrace(); } catch(Exception e3){ e3.printStackTrace(); } return result; } } package com.nio.client; import java.io.IOException; import java.net.InetSocketAddress; import java.nio.ByteBuffer; import java.nio.channels.SelectionKey; import java.nio.channels.Selector; import java.nio.channels.SocketChannel; import java.util.Iterator; import com.nio.user.ClientUser; import com.nio.user.ClientUserManager; import com.nio.user.UserData; public class NIOClient { private ClientUserManager cltManager = null; //通道管理器 private Selector selector; /** * 获得一个Socket通道，并对该通道做一些初始化的工作 * @param ip 连接的服务器的ip * @param port 连接的服务器的端口号 * @throws IOException */ public void initClient(String ip,int port) throws IOException { cltManager = ClientUserManager.instance(); // 获得一个Socket通道 SocketChannel channel = SocketChannel.open(); // 设置通道为非阻塞 channel.configureBlocking(false); // 获得一个通道管理器 this.selector = Selector.open(); // 客户端连接服务器,其实方法执行并没有实现连接，需要在listen（）方法中调 //用channel.finishConnect();才能完成连接 channel.connect(new InetSocketAddress(ip,port)); //将通道管理器和该通道绑定，并为该通道注册SelectionKey.OP_CONNECT事件。 channel.register(selector, SelectionKey.OP_CONNECT); } /** * 采用轮询的方式监听selector上是否有需要处理的事件，如果有，则进行处理 * @throws IOException * @throws InterruptedException */ @SuppressWarnings("unchecked") public void listen() throws IOException, InterruptedException { // 轮询访问selector while (true) { // 选择一组可以进行I/O操作的事件，放在selector中,客户端的该方法不会阻塞， //这里和服务端的方法不一样，查看api注释可以知道，当至少一个通道被选中时， //selector的wakeup方法被调用，方法返回，而对于客户端来说，通道一直是被选中的 selector.select(); // 获得selector中选中的项的迭代器 Iterator ite = this.selector.selectedKeys().iterator(); while (ite.hasNext()) { SelectionKey key = (SelectionKey) ite.next(); // 连接事件发生 if (key.isConnectable()) { SocketChannel channel = (SocketChannel) key .channel(); System.out.println("channel client ?" + channel); // 如果正在连接，则完成连接 if(channel.isConnectionPending()){ channel.finishConnect(); } //设置成非阻塞 channel.configureBlocking(false); //在这里可以给服务端发送信息哦 //channel.write(ByteBuffer.wrap(new String("向服务端发送了一条信息").getBytes())); //在和服务端连接成功之后，为了可以接收到服务端的信息，需要给通道设置读的权限。 channel.register(this.selector, SelectionKey.OP_READ); //添加用户 UserData userData = new UserData(); userData.lineState = 1; userData.channel = channel; cltManager.addUser(userData); //连接成功发送一个通知消息 UIClient.sendUserInfoMsg(); } else if (key.isReadable()) { ClientUser cltUser = cltManager.getUser((SocketChannel)key.channel()); if (!cltUser.read()) { key.channel().close(); } } //删除已选的key,以防重复处理 ite.remove(); } } } } package com.nio.server; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.net.InetSocketAddress; import java.nio.channels.SelectionKey; import java.nio.channels.Selector; import java.nio.channels.ServerSocketChannel; import java.nio.channels.SocketChannel; import java.util.HashMap; import java.util.Iterator; import java.util.Vector; import com.nio.user.ServerUser; import com.nio.user.ServerUserManager; import com.nio.user.UserData; import com.ui.server.BootEndInterface; import com.ui.server.ServerBootFrame; public class NIOServer implements BootEndInterface { private ServerBootFrame serverFrame = new ServerBootFrame("服务器端"); private ServerUserManager userManager = null; HashMap hmClient = new HashMap(); Vector client = new Vector(); int count = 0; private static NIOServer nioServer = null; public NIOServer() { serverFrame.showFrame(); serverFrame.bootingServer(this); serverFrame.endingServer(this); serverFrame.closeWindow(this); nioServer = this; } // 通道管理器 private Selector selector; /** * 获得一个ServerSocket通道，并对该通道做一些初始化的工作 * * @param port * 绑定的端口号 * @throws IOException */ public void initServer(int port) throws IOException { serverFrame.appendStringTojtaState("服务器(NIO机制)启动中......\n"); // 获得一个ServerSocket通道 ServerSocketChannel serverChannel = ServerSocketChannel.open(); // 设置通道为非阻塞 serverChannel.configureBlocking(false); // 将该通道对应的ServerSocket绑定到port端口 serverChannel.socket().bind(new InetSocketAddress(port)); // 获得一个通道管理器 this.selector = Selector.open(); // 将通道管理器和该通道绑定，并为该通道注册SelectionKey.OP_ACCEPT事件,注册该事件后， // 当该事件到达时，selector.select()会返回，如果该事件没到达selector.select()会一直阻塞。 serverChannel.register(selector, SelectionKey.OP_ACCEPT); //System.out.println("serverChannel 0?" + serverChannel); } /** * 采用轮询的方式监听selector上是否有需要处理的事件，如果有，则进行处理 * * @throws IOException */ @SuppressWarnings("unchecked") public void listen() throws IOException { // System.out.println("服务端启动成功！"); serverFrame.appendStringTojtaState("服务器(NIO机制)启动成功......\n"); // 轮询访问selector while (true) { // 当注册的事件到达时，方法返回；否则,该方法会一直阻塞 selector.select(); // 获得selector中选中的项的迭代器，选中的项为注册的事件 Iterator ite = this.selector.selectedKeys().iterator(); while (ite.hasNext()) { SelectionKey key = (SelectionKey) ite.next(); // 客户端请求连接事件 if (key.isAcceptable()) { ServerSocketChannel server = (ServerSocketChannel) key .channel(); // 获得和客户端连接的通道 SocketChannel channel = server.accept(); System.out.println("channel A?" + channel); // 设置成非阻塞 channel.configureBlocking(false); // 在这里可以给客户端发送信息哦 // channel.write(ByteBuffer.wrap(new // String("向客户端发送了一条信息").getBytes())); // 在和客户端连接成功之后，为了可以接收到客户端的信息，需要给通道设置读的权限。 channel.register(this.selector, SelectionKey.OP_READ); // 添加一个玩家对象 UserData userData = new UserData(); userData.lineState = 1; userData.channel = channel; userManager.addUser(userData); } else if (key.isReadable()) { ServerUser serverUser = userManager .getUser((SocketChannel) key.channel()); // 读取数据失败 if (!serverUser.read()) { serverUser.clean(); key.channel().close(); } } // 删除已选的key,以防重复处理 ite.remove(); } } } /** * 启动服务端测试 * * @throws IOException */ public static void main(String[] args) throws IOException { new NIOServer(); } @Override public void boot() { userManager = ServerUserManager.instance(); userManager.initUsers(); serverFrame.appendStringTojtaState("创建玩家内存数据对象成功...\n"); new Thread(new Runnable() { @Override public void run() { try { NIOServer.this.initServer(5555); NIOServer.this.listen(); } catch (Exception e) { serverFrame.appendStringTojtaState("服务器启动失败......\n"); } } }).start(); //服务端主逻辑处理 new Thread(new Runnable() { @Override public void run() { try { while (true) { Thread.sleep(1); userManager.run(); } } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }).start(); } @Override public void end() { if (selector != null) { try { selector.close(); selector = null; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } System.exit(0); } public void solveMsg(String message) { try { System.out.println(message); // 对消息进行分析 String msg[] = message.split("#"); if (msg[0].equals("AddUser") == true) { hmClient.put(msg[1], msg[2]); sendUsersToOneUser(msg[1]); if (likeThisName(msg[1]))// 如果出现同名用户,则在用户名后面添加数字来区分 { msg[1] = msg[1] + count; } client.add(msg[1]); serverFrame.appendStringTojtaState(msg[1] + "上线...\n"); sendMessageToAllUsers( "AddUser" + "#" + msg[1] + "#" + hmClient.get(msg[1]), msg[1]); } else if (msg[0].equals("UserQuit") == true) { sendMessageToAllUsers("UserQuit" + "#" + msg[1] + "#" + hmClient.get(msg[1]), msg[1]); serverFrame.appendStringTojtaState(msg[1] + "离线...\n"); deleteKeyValue(msg[1]); client.remove(msg[1]); // 应该删除vecUser容器中的对应的Socket对象 } else if (msg[0].equals("Message") == true) { // 如果将消息发送给特定用户 if (msg[1].equals("One") == true) { sendMessageToOneUser("Message" + "#" + msg[2] + "#" + msg[6], msg[4]); } else// 将消息发送给全部用户 { sendMessageToAllUsers("Message" + "#" + msg[2] + "#" + msg[4], msg[2]); } } } catch (Exception e) { e.printStackTrace(); } } public void sendMessageToAllUsers(String msg, String notSendToThisUserName) throws UnsupportedEncodingException { ServerUser lstUsers[] = userManager.getUsers(); for (int i = 0; i < lstUsers.length; i++) { if (lstUsers[i].channel != null) { String address = lockOut("" + lstUsers[i].channel.socket().getRemoteSocketAddress()); if ( !address.equals(hmClient.get(notSendToThisUserName)) ) { lstUsers[i].write(msg.getBytes("utf-8")); } } } } public void sendMessageToOneUser(String msg, String sendToThisUserName) throws UnsupportedEncodingException { ServerUser lstUsers[] = userManager.getUsers(); for (int i = 0; i < lstUsers.length; i++) { if (lstUsers[i].channel != null) { String address = lockOut("" + lstUsers[i].channel.socket().getRemoteSocketAddress()); if ( address.equals(hmClient.get(sendToThisUserName)) ) { lstUsers[i].write(msg.getBytes("utf-8")); break; } } } } // 方法完成将在线用户添给用户的下拉表中 public void sendUsersToOneUser(String newUserName) throws UnsupportedEncodingException { Iterator it = client.listIterator(); for (; it.hasNext();) { String name = it.next(); String ipAndPort = hmClient.get(name); sendMessageToOneUser("OnlyAddUser" + "#" + name + "#" + ipAndPort, newUserName); } } // 将键值对添加到hmClient哈希表中 public void createKeyValue(String userName, String socketAddress) { hmClient.put(userName, socketAddress); } // 从哈希表中删除指定键值对(键为:userName); public void deleteKeyValue(String userName) { hmClient.remove(userName); } // 将字符串前面的斜杠去掉 public String lockOut(String socketAddress) { return socketAddress.substring(1, socketAddress.length()); } // 如果client容器中存放的用户名出现相似用户,则用户名后面添加一个数字 public boolean likeThisName(String thisName) { count = 0; for (Iterator it = client.listIterator(); it.hasNext();) { String temp = (String) it.next(); if (temp.startsWith(thisName) == true) { count++; } } if (count > 0) return true; else return false; } public static void handleMessage(String msg) { // System.out.println("服务端收到信息：" + msg); nioServer.solveMsg(msg); } }
C#图书馆管理信息系统
附登陆代码： using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Data.SqlClient; namespace 图书馆管理信息系统 { /// /// Form1 的摘要说明。 /// public class login : System.Windows.Forms.Form { private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; private System.Windows.Forms.Label label3; private System.Windows.Forms.Button button1; private System.Windows.Forms.Button button2; private System.Windows.Forms.Button button3; private System.Windows.Forms.TextBox userid; private System.Data.SqlClient.SqlConnection sqlConnection1; private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1; private System.Data.SqlClient.SqlCommand sqlSelectCommand1; private System.Data.SqlClient.SqlCommand sqlInsertCommand1; private System.Data.SqlClient.SqlCommand sqlUpdateCommand1; private System.Data.SqlClient.SqlCommand sqlDeleteCommand1; private 图书馆管理信息系统.DataSet1 dataSet11; private System.Windows.Forms.TextBox textboxpass; /// /// 必需的设计器变量。 /// private System.ComponentModel.Container components = null; public login() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } /// /// 清理所有正在使用的资源。 /// protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows 窗体设计器生成的代码 /// /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// private void InitializeComponent() { System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(login)); this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label();
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