java房屋信息系统

以下是一个简单的Java房屋信息系统的示例，其中包括管理员角色的功能：

import java.util.ArrayList;
import java.util.Scanner;

public class HousingSystem {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        ArrayList<House> houses = new ArrayList<>();
        ArrayList<Tenant> tenants = new ArrayList<>();
        ArrayList<Contract> contracts = new ArrayList<>();
        ArrayList<Payment> payments = new ArrayList<>();
        ArrayList<Schedule> schedules = new ArrayList<>();
        ArrayList<Refund> refunds = new ArrayList<>();
        ArrayList<Viewing> viewings = new ArrayList<>();

        while (true) {
            System.out.println("请选择您的身份：1.管理员 2.租户 3.退出");
            int identity = scanner.nextInt();
            if (identity == 1) {
                System.out.println("请输入管理员用户名和密码：");
                String username = scanner.next();
                String password = scanner.next();
                if (username.equals("admin") && password.equals("admin")) {
                    System.out.println("欢迎，管理员！");
                    while (true) {
                        System.out.println("请选择您要进行的操作：1.房源信息查询 2.房源信息增删改查 3.在租列表 4.查看租房合同 5.修改租房合同 6.退租列表 7.退租申请 8.审批看房申请 9.填写合同 10.查看退租申请 11.收租管理 12.查看代缴 13.查看已经缴纳的租金 14.日程 15.退出");
                        int operation = scanner.nextInt();
                        if (operation == 1) {
                            System.out.println("房源信息如下：");
                            for (House house : houses) {
                                System.out.println(house);
                            }
                        } else if (operation == 2) {
                            System.out.println("请选择您要进行的操作：1.增加房源 2.删除房源 3.修改房源信息 4.查询房源信息");
                            int subOperation = scanner.nextInt();
                            if (subOperation == 1) {
                                System.out.println("请输入房源信息：");                                String address = scanner.next();
                                int area = scanner.nextInt();
                                int price = scanner.nextInt();
                                House house = new House(address, area, price);
                                houses.add(house);
                                System.out.println("房源信息添加成功！");
                            } else if (subOperation == 2) {
                                System.out.println("请输入要删除的房源地址：");
                                String address = scanner.next();
                                for (House house : houses) {
                                    if (house.getAddress().equals(address)) {
                                        houses.remove(house);
                                        System.out.println("房源信息删除成功！");
                                        break;
                                    }
                                }
                            } else if (subOperation == 3) {
                                System.out.println("请输入要修改的房源地址：");
                                String address = scanner.next();
                                for (House house : houses) {
                                    if (house.getAddress().equals(address)) {
                                        System.out.println("请输入新的房源信息：");
                                        String newAddress = scanner.next();
                                        int newArea = scanner.nextInt();
                                        int newPrice = scanner.nextInt();
                                        house.setAddress(newAddress);
                                        house.setArea(newArea);
                                        house.setPrice(newPrice);
                                        System.out.println("房源信息修改成功！");
                                        break;
                                    }
                                }
                            } else if (subOperation == 4) {
                                System.out.println("请输入要查询的房源地址：");
                                String address = scanner.next();
                                for (House house : houses) {
                                    if (house.getAddress().equals(address)) {
                                        System.out.println(house);
                                        break;
                                    }
                                }
                            }
                        } else if (operation == 3) {
                            System.out.println("在租列表如下：");
                            for (Contract contract : contracts) {
                                if (contract.getStatus().equals("在租")) {
                                    System.out.println(contract);
                                }
                            }
                        } else if (operation == 4) {
                            System.out.println("请输入租户姓名：");
                            String name = scanner.next();
                            for (Contract contract : contracts) {
                                if (contract.getTenant().getName().equals(name)) {
                                    System.out.println(contract);
                                    break;
                                }
                            }
                        } else if (operation == 5) {
                            System.out.println("请输入租户姓名：");
                            String name = scanner.next();
                            for (Contract contract : contracts) {
                                if (contract.getTenant().getName().equals(name)) {
                                    System.out.println("请输入新的租房合同信息：");
                                    String address = scanner.next();
                                    int area = scanner.nextInt();
                                    int price = scanner.nextInt();
                                    contract.setHouse(new House(address, area, price));
                                    System.out.println("租房合同修改成功！");
                                    break;
                                }
                            }
                        } else if (operation == 6) {
                            System.out.println("退租列表如下：");
                            for (Refund refund : refunds) {
                                System.out.println(refund);
                            }
                        } else if (operation == 7) {
                            System.out.println("请输入租户姓名：");
                            String name = scanner.next();
                            for (Contract contract : contracts) {
                                if (contract.getTenant().getName().equals(name)) {
                                    System.out.println("请输入退租原因：");
                                    String reason = scanner.next();
                                    Refund refund = new Refund(contract, reason);
                                    refunds.add(refund);
                                    contract.setStatus("退租申请中");
                                    System.out.println("退租申请提交成功！");
                                    break;
                                }
                            }
                        } else if (operation == 8) {
                            System.out.println("请输入租户姓名：");
                            String name = scanner.next();
                            for (Viewing viewing : viewings) {
                                if (viewing.getTenant().getName().equals(name)) {
                                    System.out.println(viewing);
                                    break;
                                }
                            }
                        } else if (operation == 9) {
                            System.out.println("请输入租户姓名：");
                            String name = scanner.next();
                            for (Contract contract : contracts) {
                                if (contract.getTenant().getName().equals(name)) {
                                    System.out.println("请输入合同信息：");
                                    String address = scanner.next();
                                    int area = scanner.nextInt();
                                    int price = scanner.nextInt();
                                    contract.setHouse(new House(address, area, price));
                                    contract.setStatus("已签订");
                                    System.out.println("合同填写成功！");
                                    break;
                                }
                            }
                        } else if (operation == 10) {
                            System.out.println("请输入租户姓名：");
                            String name = scanner.next();
                            for (Refund refund : refunds) {
                                if (refund.getContract().getTenant().getName().equals(name)) {
                                    System.out.println(refund);
                                    break;
                                }
                            }
                        } else if (operation == 11) {
                            System.out.println("收租管理如下：");
                            for (Payment payment : payments) {
                                System.out.println(payment);
                            }
                        } else if (operation == 12) {
                            System.out.println("请输入租户姓名：");
                            String name = scanner.next();
                            for (Payment payment : payments) {
                                if (payment.getTenant().getName().equals(name)) {
                                    System.out.println(payment);
                                    break;
                                }
                            }
                        } else if (operation == 13) {
                            System.out.println("请输入租户姓名：");
                            String name = scanner.next();
                            for (Payment payment : payments) {
                                if (payment.getTenant().getName().equals(name)) {
                                    System.out.println("已经缴纳的租金为：" + payment.getAmount());
                                    break;
                                }
                            }
                        } else if (operation == 14) {
                            System.out.println("日程如下：");
                            for (Schedule schedule : schedules) {
                                System.out.println(schedule);
                            }
                        } else if (operation == 15) {
                            break;
                        }
                    }
                } else {
                    System.out.println("用户名或密码错误！");
                }
            } else if (identity == 2) {
                System.out.println("请输入租户姓名：");
                String name = scanner.next();
                Tenant tenant = null;
                for (Tenant t : tenants) {
                    if (t.getName().equals(name)) {
                        tenant = t;
                        break;
                    }
                }
                if (tenant == null) {
                    tenant = new Tenant(name);
                    tenants.add(tenant);
                }
                while (true) {
                    System.out.println("请选择您要进行的操作：1.查看房源信息 2.查看租房合同 3.修改租房合同 4.申请退租 5.查看退租申请 6.查看已经缴纳的租金 7.退出");
                    int operation = scanner.nextInt();
                    if (operation == 1) {
                        System.out.println("房源信息如下：");
                        for (House house : houses) {
                            System.out.println(house);
                        }
                    } else if (operation == 2) {
                        for (Contract contract : contracts) {
                            if (contract.getTenant().equals(tenant)) {
                                System.out.println(contract);
                                break;
                            }
                        }
                    } else if (operation == 3) {
                        for (Contract contract : contracts) {
                            if (contract.getTenant().equals(tenant)) {
                                System.out.println("请输入新的租房合同信息：");
                                String address = scanner.next();
                                int area = scanner.nextInt();
                                int price = scanner.nextInt();
                                contract.setHouse(new House(address, area, price));
                                System.out.println("租房合同修改成功！");
                                break;
                            }
                        }
                    } else if (operation == 4) {
                        System.out.println("请输入退租原因：");
                        String reason = scanner.next();
                        Contract contract = null;
                        for (Contract c : contracts) {
                            if (c.getTenant().equals(tenant) && c.getStatus().equals("在租")) {
                                contract = c;
                                break;
                            }
                        }
                        if (contract != null) {
                            Refund refund = new Refund(contract, reason);
                            refunds.add(refund);
                            contract.setStatus("退租申请中");
                            System.out.println("退租申请提交成功！");
                        } else {
                            System.out.println("您当前没有在租的房源！");
                        }
                    } else if (operation == 5) {
                        for (Refund refund : refunds) {
                            if (refund.getContract().getTenant().equals(tenant)) {
                                System.out.println(refund);
                                break;
                            }
                        }
                    } else if (operation == 6) {
                        for (Payment payment : payments) {
                            if (payment.getTenant().equals(tenant)) {
                                System.out.println("已经缴纳的租金为：" + payment.getAmount());
                                break;
                            }
                        }
                    } else if (operation == 7) {
                        break;
                    }
                }
            } else if (identity == 3) {
                break;
            }
        }
    }
}

class House {
    private String address;
    private int area;
    private int price;

    public House(String address, int area, int price) {