CoreJava/exp11/AccountManager.java

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;
    }


}