bank.java

实现银行系统的一系列功能,比如存款取款透支查询余额等

package tarena.bank.server;

import java.io.*;
import java.net.*;
import java.util.*;


public class Bank extends Thread {
	private ServerSocket ss = null;

	static List<Account> accountList;

	private static Bank bank;

	public Bank() {
		accountList = new ArrayList<Account>();
		try {
			ss = new ServerSocket(8888);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public synchronized static Bank getBank() {
		if (bank == null) {
			bank = new Bank();
		}
		return bank;
	}

	public void run() {
		while (true) {
			try {
				Socket so = ss.accept();
				ServerThread st = new ServerThread(so);
				st.start();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	public static Account register(long id, String passwd, String name,
			String personId, String email, double balance, int type) {
		if (type == SavingAccount.ACCOUNT_TYPE) {
			return new SavingAccount(id, passwd, name, personId, email,
					balance, type);
		} else if (type == CreditAccount.ACCOUNT_TYPE) {
			return new CreditAccount(id, passwd, name, personId, email,
					balance, type);
		} else if (type == LoanSavingAccount.ACCOUNT_TYPE) {
			return new LoanSavingAccount(id, passwd, name, personId, email,
					balance, type);
		} else if (type == LoanCreditAccount.ACCOUNT_TYPE) {
			return new LoanCreditAccount(id, passwd, name, personId, email,
					balance, type);
		}
		return null;
	}

	public Account register(long id, String passwd) {
		//从文件中读取Account
		return FileDAO.getAccount(id, passwd);
	}

	public Account deposit(long id, double dmoney) {
		// Account a = null;//同上
		int i = 0;
		for (i = 0; i < accountList.size(); i++) {
			if (accountList.get(i).getId() == id) {
				accountList.get(i).deposit(dmoney);
				// accountList.get(i).setBalance(accountList.get(i).getBalance()
				// + dmoney);
				break;
			}
		}
		return accountList.get(i);
	}

	public Account withdraw(long id, double tmoney) {
		// Account a = null;
		int i = 0;
		for (i = 0; i < accountList.size(); i++) {
			if (accountList.get(i).getId() == id) {
				// a = account[i];
				if (accountList.get(i) instanceof SavingAccount) {
					SavingAccount sa = (SavingAccount) accountList.get(i);
					sa.withdraw(tmoney);
				} else if (accountList.get(i) instanceof CreditAccount) {
					CreditAccount ca = (CreditAccount) accountList.get(i);
					ca.withdraw(tmoney);
				}
				break;
			}
		}
		return accountList.get(i);
	}

	public Account setCeiling(long id, double cmoney) {
		// Account a = null;
		int i = 0;
		for (i = 0; i < accountList.size(); i++) {
			if (accountList.get(i).getId() == id) {
				// a = account[i];
				if (accountList.get(i) instanceof CreditAccount) {
					CreditAccount ca = (CreditAccount) accountList.get(i);
					ca.setCeiling(cmoney);
				}
				return accountList.get(i);
			}
		}
		return null;
	}

	public double statAll(List<Account> accountList) {
		double all = 0;
		for (int i = 0; i < accountList.size(); i++) {
			all += accountList.get(i).getBalance();
		}
		return all;
	}

	public double statAllCeiling(List<Account> accountList) {
		double all = 0;
		for (int i = 0; i < accountList.size(); i++) {
			if (accountList.get(i) instanceof CreditAccount) {
				CreditAccount ca = (CreditAccount) accountList.get(i);
				all += ca.getCeiling();
			}
		}
		return all;
	}

	public Account requestLoan(long id, double lmoney) {
		int i = 0;
		for (i = 0; i < accountList.size(); i++) {
			if (accountList.get(i).getId() == id) {
				if (accountList.get(i) instanceof LoanSavingAccount) {
					((LoanSavingAccount) accountList.get(i))
							.requestLoan(lmoney);
					return accountList.get(i);
				} else if (accountList.get(i) instanceof LoanCreditAccount) {
					((LoanCreditAccount) accountList.get(i))
							.requestLoan(lmoney);
					return accountList.get(i);
				}
			}
		}
		return null;
	}

	public Account payLoan(long id, double pmoney) {
		int i = 0;
		for (i = 0; i < accountList.size(); i++) {
			if (accountList.get(i).getId() == id) {
				if (accountList.get(i) instanceof LoanSavingAccount) {
					((LoanSavingAccount) accountList.get(i)).payLoan(pmoney);
					return accountList.get(i);
				} else if (accountList.get(i) instanceof LoanCreditAccount) {
					((LoanCreditAccount) accountList.get(i)).payLoan(pmoney);
					return accountList.get(i);
				}
			}
		}
		return null;
	}

	public double statAllLoan(List<Account> accountList) {
		double all = 0;
		for (int i = 0; i < accountList.size(); i++) {
			if (accountList.get(i) instanceof LoanCreditAccount) {
				LoanCreditAccount ca = (LoanCreditAccount) accountList.get(i);
				all += ca.getAllLoan();
			} else if (accountList.get(i) instanceof LoanSavingAccount) {
				LoanSavingAccount ca = (LoanSavingAccount) accountList.get(i);
				all += ca.getAllLoan();
			}

		}
		return all;
	}

	public static void main(String[] args) {
		getBank().start();
	}
}