同步

exp11/Account.java

@@ -0,0 +1,37 @@
+package exp11;
+
+public class Account {
+    private String username;
+    private String password;
+    private boolean lock;
+
+    public Account(String username, String password, String lock) {
+        this.username = username;
+        this.password = password;
+        if(lock.equals("true")){
+            this.lock = true;
+        }else {
+            this.lock = false;
+        }
+    }
+
+    String getUserName() {
+        return this.username;
+    }
+
+    String getPassword() {
+        return this.password;
+    }
+
+    boolean isLock() {
+        return lock;
+    }
+
+    void lock() {
+        this.lock = true;
+    }
+
+    public String toString() {
+        return this.username +"," +this.password +"," +this.lock;
+    }
+}

exp11/AccountDemo.java

@@ -1,7 +1,10 @@
 package exp11;
 
-import javax.swing.*;
+import javax.swing.JFrame;
 
 public class AccountDemo {
-    JFrame rejister = new JFrame();
+    public static void main(String[] args) {
+        JFrame loginFrame = LoginFrame.creatLonginFrame();
+        loginFrame.setVisible(true);
+    }
 }

exp11/AccountManager.java

@@ -0,0 +1,104 @@
+package exp11;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+
+public class AccountManager {
+    private String userinfoPath = "D:\\MyProjects\\CoreJava\\exp11\\userinfo.text";
+    private int faildCount=0;
+    
+    private ArrayList<Account> getAccounts() {
+        File userinfo = new File(userinfoPath);
+        ArrayList<Account> accounts = new ArrayList<>();
+        try{
+            BufferedReader reader = new BufferedReader(new FileReader(userinfo));
+            String line;
+            while ((line=reader.readLine()) != null) {
+                String[] strs = line.split(",");
+                Account account = new Account(strs[0], strs[1], strs[2]);
+                accounts.add(account);
+            }
+            reader.close();
+        }catch(IOException e) {
+            e.printStackTrace();
+        }
+
+        return accounts;
+    }
+
+    private Account getAccount(String username) {
+        ArrayList<Account> accounts = getAccounts();
+        for (Account account : accounts) {
+            if(account.getUserName().equals(username)) {
+                return account;
+            }
+        }
+
+        return null;
+    }
+
+    int getFaildCount(){
+        return this.faildCount;
+    }
+
+    void resetFaildCount() {
+        this.faildCount=0;
+    }
+
+    public boolean userIsExist(String username) {
+        ArrayList<Account> accounts = getAccounts();
+        for (Account account : accounts) {
+            if (username.equals(account.getUserName())){
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public void addUser(Account account) {
+        if (userIsExist(account.getUserName())) {
+        }else {
+            File userinfo = new File(userinfoPath);
+            try{
+                FileWriter writer = new FileWriter(userinfo, true);
+                writer.write(account.toString());
+                writer.close();
+            }catch(IOException e) {
+                e.printStackTrace();
+            }
+        }
+        
+    }
+
+    boolean usernameVerify(String username) {
+        if(username.matches("^[a-zA-Z][a-zA-Z1-9]*$")){
+            return true;
+        }else {
+            return false;
+        }
+    }
+
+    int accountVerify(String username, String password) {
+        Account account = getAccount(username);
+        System.out.println(account.toString());
+        if(account.isLock()){
+            return -1;
+        }else if ((username.equals(account.getUserName())) && (password.equals(account.getPassword()))){
+            return 1;
+        }else {
+            this.faildCount++;
+            if(faildCount >= 3){
+                account.lock();
+            }
+        }
+
+        return 0;
+    }
+
+
+}

exp11/LoginFrame.java

@@ -0,0 +1,94 @@
+package exp11;
+
+import java.awt.*;
+import javax.swing.*;
+import java.awt.event.*;
+
+public class LoginFrame {
+    
+    static JFrame creatLonginFrame() {
+        AccountManager am = new AccountManager();
+
+        JFrame f = new JFrame("登录");
+        f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+        f.setSize(400, 300);
+        f.setLayout(null);
+        f.setLocationRelativeTo(f);
+        f.setAlwaysOnTop(true);
+        f.setResizable(false);
+
+       
+        
+        JLabel accountJLabel = new JLabel("账号");
+        accountJLabel.setBounds(50, 50, 50, 20);
+        JTextField usernameTextField = new JTextField();
+        usernameTextField.setBounds(100, 50, 200, 20);
+
+        JLabel passwordJLabel = new JLabel("密码");
+        passwordJLabel.setBounds(50, 100, 50, 20);
+        JPasswordField passwordField = new JPasswordField();
+        passwordField.setBounds(100, 100, 200, 20);
+
+        JButton loginJButton = new JButton("登录");
+        loginJButton.setBounds(240, 200, 60, 30);
+        loginJButton.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e){
+                String username = usernameTextField.getText();
+                String password = new String(passwordField.getPassword());
+
+                if (!am.userIsExist(username)) {
+                    showDialog(f, "用户不存在!");
+                }else {
+                    int verify = am.accountVerify(username, password);
+                    if(am.getFaildCount() >= 3){
+                        String text = "用户" +username +"已被锁定,请与管理联系!";
+                        showDialog(f, text);
+                        //am.resetFaildCount();
+                    }else if (verify==1) {
+                        showDialog(f, "登陆成功");
+                        am.resetFaildCount();
+                    }else if (verify==0){
+                        String text = "密码错误,你还有" +(3-am.getFaildCount()) +"次机会";
+                        showDialog(f, text);
+                    }
+                }
+            }
+        });
+
+        JButton registerButton = new JButton("注册");
+        registerButton.setBounds(90, 200, 60, 30);
+        registerButton.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e){
+                JFrame registerFrame = RegisterFrame.creatRegisterFrame();
+                registerFrame.setVisible(true);
+                f.dispose();
+            }
+        });
+
+        f.add(accountJLabel);
+        f.add(usernameTextField);
+        f.add(passwordJLabel);
+        f.add(passwordField);
+        f.add(loginJButton);
+        f.add(registerButton);
+
+        return f;
+    }
+    
+
+    static void showDialog(JFrame f, String text) {
+        JDialog dialog = new JDialog(f, "提示");
+        dialog.setSize(200, 150);
+        dialog.setLocationRelativeTo(f);
+        dialog.setDefaultCloseOperation(1);
+        dialog.setLayout(new FlowLayout());
+
+        JLabel textLabel = new JLabel(text);
+        
+        dialog.add(textLabel);
+
+        dialog.setVisible(true);
+    }
+}

exp11/RegisterFrame.java

@@ -0,0 +1,95 @@
+package exp11;
+
+import java.awt.*;
+import java.time.LocalDateTime;
+import javax.swing.*;
+import java.awt.event.*;
+
+public class RegisterFrame {
+
+    static JFrame creatRegisterFrame() {
+        AccountManager am = new AccountManager();
+
+        JFrame f = new JFrame("注册");
+        f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+        f.setSize(400, 300);
+        f.setLayout(null);
+        f.setLocationRelativeTo(f);
+        f.setAlwaysOnTop(true);
+        f.setResizable(false);
+
+       
+        
+        JLabel accountJLabel = new JLabel("账号");
+        accountJLabel.setBounds(50, 50, 50, 20);
+        JTextField usernameTextField = new JTextField();
+        usernameTextField.setBounds(100, 50, 200, 20);
+
+        JLabel passwordJLabel = new JLabel("密码");
+        passwordJLabel.setBounds(50, 100, 50, 20);
+        JPasswordField passwordField = new JPasswordField();
+        passwordField.setBounds(100, 100, 200, 20);
+
+        JLabel confirmPasswordJLabel = new JLabel("确认密码");
+        confirmPasswordJLabel.setBounds(50, 150, 50, 20);
+        JPasswordField confirmPasswordField = new JPasswordField();
+        confirmPasswordField.setBounds(100, 150, 200, 20);
+
+        JButton loginJButton = new JButton("登录");
+        loginJButton.setBounds(90, 200, 60, 30);
+        loginJButton.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e){
+                JFrame loginFrame = LoginFrame.creatLonginFrame();
+                loginFrame.setVisible(true);
+                f.dispose();
+            }
+        });
+
+        JButton registerButton = new JButton("注册");
+        registerButton.setBounds(240, 200, 60, 30);
+        registerButton.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e){
+                String username = usernameTextField.getText();
+                String password = new String(passwordField.getPassword());
+                Account account = new Account(username, password, "false");
+
+                if (am.userIsExist(username)){
+                    showDialog(f, "用户已存在!");
+                }else {
+                    am.addUser(account);
+                    String text = username +"在" +LocalDateTime.now().toString() +"注册成功";
+                    showDialog(f, text);
+                }
+            }
+        });
+
+        f.add(accountJLabel);
+        f.add(usernameTextField);
+        f.add(passwordJLabel);
+        f.add(passwordField);
+        f.add(confirmPasswordJLabel);
+        f.add(confirmPasswordField);
+
+        f.add(loginJButton);
+        f.add(registerButton);
+
+        return f;
+    }
+    
+
+    static void showDialog(JFrame f, String text) {
+        JDialog dialog = new JDialog(f, "提示");
+        dialog.setSize(200, 150);
+        dialog.setLocationRelativeTo(f);
+        dialog.setDefaultCloseOperation(1);
+        dialog.setLayout(new FlowLayout());
+
+        JLabel textLabel = new JLabel(text);
+        
+        dialog.add(textLabel);
+
+        dialog.setVisible(true);
+    }
+}

exp11/userinfo.text

@@ -0,0 +1 @@
+stu1,123456,false

exp12/Person.java

@@ -0,0 +1,21 @@
+package exp12;
+
+import exp12.TicketingSystem.TicketingSystem;
+
+public class Person extends Thread{
+
+    @Override
+    public void run() {
+        while (true) {
+            try {
+                Thread.sleep(3);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+
+            if ( !TicketingSystem.buy(Thread.currentThread().getName())) {
+                break;
+            }
+        }
+    }
+}

exp12/TicketingSystem/TicketingSystem.java

@@ -0,0 +1,29 @@
+package exp12.TicketingSystem;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class TicketingSystem {
+    private int tickets = 200;
+    private Map<String, Integer> map = new HashMap<>();
+    final int MAX_PERSON = 5;
+    final int MAX_TICKET_PER_PERSON =10;
+
+
+    public static void main(String[] args) {
+        
+    }
+
+    public synchronized boolean buy(String user) {
+        if(!map.containsValue(user) && map.size()<MAX_PERSON) {
+            map.put(user, 1);
+            this.tickets--;
+        }else if(map.get(user) < MAX_PERSON) {
+            
+        }
+
+
+        return false;
+    }
+    
+}

test/RegexTest.java

@@ -0,0 +1,16 @@
+package test;
+
+public class RegexTest {
+    public static void main(String[] args) {
+        String regex = "^[a-zA-Z][a-zA-Z1-9]*$";  
+        String testString = "Abc123"; // 测试字符串  
+        
+        boolean matches = testString.matches(regex);  
+        
+        if (matches) {  
+            System.out.println("字符串仅由字母和数字（1-9）组成");  
+        } else {  
+            System.out.println("字符串包含非字母或非数字（1-9）的字符");  
+        }
+    }
+}