A. 請問用java程序模擬qq登錄界面的代碼怎麼寫啊
太簡單了！你看看！ package dyno.swing.beans.qq; import javax.swing.*; import javax.swing.event.MouseInputListener; import org.jvnet.substance.skin.; /*import org.jvnet.substance.skin.SubstanceModerateLookAndFeel; import org.jvnet.substance.skin.;*/ import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.io.IOException; import java.io.PrintWriter; import java.net.Socket; import java.net.UnknownHostException; import java.sql.ResultSet; import java.sql.SQLException; import java.util.Scanner; public class QQLogin extends JFrame implements MouseInputListener,ActionListener{ JLabel guanggao,beijing,wenzi,she,zhanghaowb,qq1,dengluzhuangtai; // JTextField zhanghao; JPopupMenu haoma; JComboBox zhanghao; JPasswordField mima; JCheckBox jizhumima,zidongdenglu; JButton denglu,chashamuma; JProgressBar jpb; SimThread activity; Timer activityMonitor; String name,qq; Socket s; public QQLogin() { try { UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); } catch (ClassNotFoundException e1) { // TODO 自動生成 catch 塊 e1.printStackTrace(); } catch (InstantiationException e1) { // TODO 自動生成 catch 塊 e1.printStackTrace(); } catch (IllegalAccessException e1) { // TODO 自動生成 catch 塊 e1.printStackTrace(); } catch ( e1) { // TODO 自動生成 catch 塊 e1.printStackTrace(); } chashamuma = new JButton("查殺木馬"); chashamuma.setBounds(240, 155,85, 20); this.add(chashamuma); jpb = new JProgressBar(); jpb.setStringPainted(true); jpb.setBounds(100, 240, 200, 15); this.add(jpb); chashamuma.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ jpb.setMaximum(1000);//設置進度欄的最大值 activity=new SimThread(1000); activity.start();//啟動線程 activityMonitor.start();//啟動定時器 chashamuma.setEnabled(false);//禁止按鈕 } }); activityMonitor=new Timer(100,new ActionListener(){//每0.5秒執行一次 public void actionPerformed(ActionEvent e){//以下動作將在事件調度線程中運行，十分安全 int current=activity.getCurrent();//得到線程的當前進度 jpb.setValue(current);//更新進度欄的值 if(current==activity.getTarget()){//如果到達目標值 activityMonitor.stop();//終止定時器 chashamuma.setEnabled(true);//激活按鈕 } } }); dengluzhuangtai = new JLabel(new ImageIcon("zaixianzhuangtai.jpg")); dengluzhuangtai.setBounds(75, 145, 35, 30); this.add(dengluzhuangtai); dengluzhuangtai.addMouseListener(this); denglu = new JButton("登錄"); denglu.setBounds(140, 155, 80, 20); this.add(denglu); this.setAlwaysOnTop(true); zidongdenglu = new JCheckBox("自動登錄"); zidongdenglu.setBounds(200, 190, 100, 30); this.add(zidongdenglu); jizhumima = new JCheckBox("記住密碼"); jizhumima.setBounds(100, 190, 100, 30); // jizhumima.setBackground(new Color(228, 244, 255)); this.add(jizhumima); haoma = new JPopupMenu(); /* zhanghao = new JTextField(20); zhanghao.setBounds(120, 78, 135, 20); zhanghao.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, Color.WHITE)); zhanghao.setFont(new Font("宋體",Font.PLAIN,13)); this.add(zhanghao);*/ // zhanghaowb = new JLabel(new ImageIcon("2.png")); // zhanghaowb.setBounds(90, 73, 194, 31); // jiantou = new JLabel(new ImageIcon("jiantou.png")); // jiantou.setBounds(256, 78, 23, 21); // jiantou.addMouseListener(this); // this.add(jiantou); // this.add(zhanghaowb); chashamuma.addActionListener(this); mima = new JPasswordField(); mima.setEchoChar('*'); mima.setFont(new Font("宋體",Font.PLAIN,13)); mima.setBounds(100, 113, 150, 20); this.add(mima); zhanghao = new JComboBox(); zhanghao.setEditable(true); zhanghao.setBounds(100, 78, 150, 20); zhanghao.setFont(new Font("宋體",Font.PLAIN,13)); this.add(zhanghao); guanggao = new JLabel(new ImageIcon("guanggao.gif")); guanggao.setBounds(0, 0, 334, 64); beijing = new JLabel(new ImageIcon("beijing.jpg")); beijing.setBounds(0, 64, 334, 154); wenzi = new JLabel(new ImageIcon("wenzi.jpg")); wenzi.setBounds(30, 75, 50, 100); denglu.addActionListener(this); // zhanghaowb.addMouseListener(this); // zhanghao.addMouseListener(this); this.add(wenzi); this.add(beijing); this.setLayout(null); this.add(guanggao); this.setVisible(true); this.setDefaultCloseOperation(3); this.setSize(340, 250); this.setLocationRelativeTo(null); } public static void main(String[] args) { /*JFrame.(true); try { UIManager.setLookAndFeel(new ()) ; UIManager.setLookAndFeel("org.jvnet.substance.skin."); } catch (Exception e) { System.out.println("Substance Raven Graphite failed to initialize"); } SwingUtilities.invokeLater(new Runnable() { public void run() { QQLogin w = new QQLogin(); w.setVisible(true); } });*/ new QQLogin(); } public void mouseClicked(MouseEvent e) { // TODO 自動生成方法存根 } public void mouseEntered(MouseEvent e) { if(e.getSource() == dengluzhuangtai) { dengluzhuangtai.setIcon(new ImageIcon("zaixianzhuangtaidian.jpg")); } } public void mouseExited(MouseEvent e) { if(e.getSource() == dengluzhuangtai) { dengluzhuangtai.setIcon(new ImageIcon("zaixianzhuangtai.jpg")); } } public void mousePressed(MouseEvent e) { // TODO 自動生成方法存根 } public void mouseReleased(MouseEvent e) { // TODO 自動生成方法存根 } public void mouseDragged(MouseEvent e) { // TODO 自動生成方法存根 } public void mouseMoved(MouseEvent e) { // TODO 自動生成方法存根 } public class liaotianchuangkou { } class SimThread extends Thread{//線程類 private int current;//進度欄的當前值 private int target;//進度欄的最大值 public SimThread(int t){ current=0; target=t; } public int getTarget(){ return target; } public int getCurrent(){ return current; } public void run(){//線程體 try{ while (current<target && !interrupted()){//如果進度欄的當前值小於目標值並且線程沒有被中斷 sleep(10); current++; if(current == 700) { sleep(3000); } else if(current == 730) { sleep(1000); } } }catch (InterruptedException e){} } } public void actionPerformed(ActionEvent e) { if(e.getSource() == chashamuma) { this.setBounds(300, 300, 340, 300); } else if(e.getSource() == denglu) { String zh = (String) zhanghao.getSelectedItem(); System.out.println(zhanghao.getSelectedItem()); // System.out.println(zhanghao.getItemAt(0)); char [] str = mima.getPassword(); String mima = String.valueOf(str);; System.out.println(mima); // Sql login = new Sql(); // if(login.login(zh,mima)) // { try { s = new Socket("127.0.0.1",8888); System.out.println(s); PrintWriter pw; Scanner sc; pw = new PrintWriter(s.getOutputStream(),true); sc = new Scanner(s.getInputStream()); String str2 = "login#289872400198724#"+zh+"#289872400198724#"+mima; System.out.println(str2); pw.println(str2); String str3 = sc.nextLine(); String yanzheng[] = str3.split("#"); System.out.println(str3); if(yanzheng[0].equals("true")) { System.out.println("登陸成功!"); name = yanzheng[1]; qq = yanzheng[2]; // this.setVisible(false); // Thread.sleep(5000); System.out.println("woao"+name); System.out.println("woai"+qq); Logined logined = new Logined(name,qq); this.setVisible(false); } else { JOptionPane.showMessageDialog(this, "用戶名或密碼錯誤!", "用戶名或密碼錯誤!", 0); } } catch (UnknownHostException e2) { // TODO 自動生成 catch 塊 e2.printStackTrace(); } catch (IOException e2) { // TODO 自動生成 catch 塊 e2.printStackTrace(); } /*try { login.rs = login.stat.executeQuery("select * from qquser where username='"+zh+"' and password = '"+mima+"'"); boolean flag = login.rs.next(); if(flag == true) { name = login.rs.getString("name"); qq = login.rs.getString("username"); } else { }*/ // } catch (SQLException e1) { // TODO 自動生成 catch 塊 // e1.printStackTrace(); // } } else { JOptionPane.showMessageDialog(this, "用戶名或密碼錯誤", "輸入錯誤", 0); } // this.setVisible(false); //new Logined(); } }
B. 模擬一個簡單的用戶登陸程序，判斷登錄的用戶名和密碼是否正確，輸出登錄判斷結果，用java怎麼寫
package test;x0dx0aimport java.util.Scanner;x0dx0apublic class TestLogin {x0dx0aprivate static final String USERNAME = "Tom";//此處定義用戶名x0dx0aprivate static final String PASSWORD = "123";//定義密碼x0dx0apublic static void main(String[] args) {x0dx0aScanner sc = new Scanner(System.in);x0dx0aSystem.out.print("請輸入您的用戶名:");x0dx0aString username_in = sc.next();x0dx0aSystem.out.print("請輸入您的密碼:");x0dx0aString password_in = sc.next();x0dx0aif(username_in.equals(USERNAME) && password_in.equals(PASSWORD)){x0dx0aSystem.out.println("登錄成功");x0dx0a}else{x0dx0aSystem.out.println("用戶名或密碼錯誤");x0dx0a}x0dx0a}x0dx0a} x0dx0a這是從控制台輸入的最簡單的方法。
C. java編寫一個程序模擬用戶登錄操作，用戶名和密碼從鍵盤輸入
import java.util.Scanner;
public class LoginTest {
/**
* @param args
*/
public static void main(String[] args) {
String loginName = "admin";
String passWord = "123456";
Scanner sc = new Scanner(System.in);
boolean isSuccess = false;
int index = 0;
while(!isSuccess){
System.out.println("請輸入用戶名:");
String name = sc.nextLine(); //讀取字元串型輸入
System.out.println("請輸入密碼:");
String passW = sc.nextLine();
if(loginName.equals(name)&&passWord.equals(passW)){
System.out.println("戶名密碼正確，退出程序");
isSuccess = true;
}else{
if(++index>=3){
System.out.println("用戶名密碼錯誤，程序即將退出");
return;
}else{
System.out.println("用戶名密碼錯誤，請重新輸入");
}
}
}
}
}
D. 用java做的登錄框 怎麼給密碼加密
密碼不是保存在cookie里么 如果非要資料庫伺服器記住密碼 那就得用上面的朋友說的MD5加密啦 雖然吧可逆 不過也是可以破的