房屋出租系统-简单java-实现

房屋出租系统-java

package com.zhou.java.Houserent.domain;

public class House {
 private int id;   
 private String name;
 private String phone;
 private String address;
 private String rent;
 private String state;

    public House(int id, String name, String phone, String address, String rent, String state) {
        this.id = id;
        this.name = name;
        this.phone = phone;
        this.address = address;
        this.rent = rent;
        this.state = state;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getRent() {
        return rent;
    }

    public void setRent(String rent) {
        this.rent = rent;
    }

    public String getState() {
        return state;
    }

    public void setState(String state) {
        this.state = state;
    }

    @Override
    public String toString() {
        return id +
                "\t\t" + name +
                "\t\t" + phone +
                "\t\t" + address +
                "\t\t\t" + rent +
                "\t\t\t" + state;
    }
}

package com.zhou.java.Houserent.Service;

import com.zhou.java.Houserent.domain.House;

public class HouseService {
    private House[] houses; //用于存放house对象
    private int houseNums = 1;
    private int idCounter = 1;

    public HouseService(int size) {
        houses = new House[size];
        houses[0] = new House(1, "张三", "123", "新乡学院", "2000", "未出租");
    }

    public House[] list() {
        return houses;
    }

    public boolean add(House newHouse) {
        if (houseNums >= houses.length) {
            System.out.println("数据已经满了，无法继续添加数据");
            return false;
        }
        houses[houseNums] = newHouse;
        houseNums++;
        newHouse.setId(++idCounter);
        return true;
    }

    public boolean delete(int idDel) {
        int index = -1;
        for (int i = 0; i < houseNums; i++) {
            if (idDel == houses[i].getId()) {
                index = i;
            }
        }
        if (index == -1) {
            return false;
        }
        for (int i = index; i < houses.length - 1; i++) {
            houses[i] = houses[i + 1];
        }
        houses[houseNums] = null;
        houseNums--;
        return true;
    }

    public House find(int findId) {

        for (int i = 0; i < houseNums; i++) {
            if (findId == houses[i].getId()) {
                return houses[i];
            }
        }
        return null;
    }
}

package com.zhou.java.Houserent.utils;


/**
	工具类的作用:
	处理各种情况的用户输入，并且能够按照程序员的需求，得到用户的控制台输入。
*/

import java.util.*;
/**

	
*/
public class Utility {
	//静态属性。。。
    private static Scanner scanner = new Scanner(System.in);

    
    /**
     * 功能：读取键盘输入的一个菜单选项，值：1——5的范围
     * @return 1——5
     */
	public static char readMenuSelection() {
        char c;
        for (; ; ) {
            String str = readKeyBoard(1, false);//包含一个字符的字符串
            c = str.charAt(0);//将字符串转换成字符char类型
            if (c != '1' && c != '2' && 
                c != '3' && c != '4' && c != '5') {
                System.out.print("选择错误，请重新输入：");
            } else break;
        }
        return c;
    }

	/**
	 * 功能：读取键盘输入的一个字符
	 * @return 一个字符
	 */
    public static char readChar() {
        String str = readKeyBoard(1, false);//就是一个字符
        return str.charAt(0);
    }
    /**
     * 功能：读取键盘输入的一个字符，如果直接按回车，则返回指定的默认值；否则返回输入的那个字符
     * @param defaultValue 指定的默认值
     * @return 默认值或输入的字符
     */
    
    public static char readChar(char defaultValue) {
        String str = readKeyBoard(1, true);//要么是空字符串，要么是一个字符
        return (str.length() == 0) ? defaultValue : str.charAt(0);
    }
	
    /**
     * 功能：读取键盘输入的整型，长度小于2位
     * @return 整数
     */
    public static int readInt() {
        int n;
        for (; ; ) {
            String str = readKeyBoard(2, false);//一个整数，长度<=2位
            try {
                n = Integer.parseInt(str);//将字符串转换成整数
                break;
            } catch (NumberFormatException e) {
                System.out.print("数字输入错误，请重新输入：");
            }
        }
        return n;
    }
    /**
     * 功能：读取键盘输入的 整数或默认值，如果直接回车，则返回默认值，否则返回输入的整数
     * @param defaultValue 指定的默认值
     * @return 整数或默认值
     */
    public static int readInt(int defaultValue) {
        int n;
        for (; ; ) {
            String str = readKeyBoard(10, true);
            if (str.equals("")) {
                return defaultValue;
            }
			
			//异常处理...
            try {
                n = Integer.parseInt(str);
                break;
            } catch (NumberFormatException e) {
                System.out.print("数字输入错误，请重新输入：");
            }
        }
        return n;
    }

    /**
     * 功能：读取键盘输入的指定长度的字符串
     * @param limit 限制的长度
     * @return 指定长度的字符串
     */

    public static String readString(int limit) {
        return readKeyBoard(limit, false);
    }

    /**
     * 功能：读取键盘输入的指定长度的字符串或默认值，如果直接回车，返回默认值，否则返回字符串
     * @param limit 限制的长度
     * @param defaultValue 指定的默认值
     * @return 指定长度的字符串
     */
	
    public static String readString(int limit, String defaultValue) {
        String str = readKeyBoard(limit, true);
        return str.equals("")? defaultValue : str;
    }


	/**
	 * 功能：读取键盘输入的确认选项，Y或N
	 * 将小的功能，封装到一个方法中.
	 * @return Y或N
	 */
    public static char readConfirmSelection() {
        System.out.println("请确定是否删除(Y/N),请小心选择: ");
        char c;
        for (; ; ) {//无限循环
        	//在这里，将接受到字符，转成了大写字母
        	//y => Y n=>N
            String str = readKeyBoard(1, false).toUpperCase();
            c = str.charAt(0);
            if (c == 'Y' || c == 'N') {
                break;
            } else {
                System.out.print("选择错误，请重新输入：");
            }
        }
        return c;
    }

    /**
     * 功能： 读取一个字符串
     * @param limit 读取的长度
     * @param blankReturn 如果为true ,表示 可以读空字符串。 
     * 					  如果为false表示 不能读空字符串。
     * 			
	 *	如果输入为空，或者输入大于limit的长度，就会提示重新输入。
     * @return
     */
    private static String readKeyBoard(int limit, boolean blankReturn) {
        
		//定义了字符串
		String line = "";

		//scanner.hasNextLine() 判断有没有下一行
        while (scanner.hasNextLine()) {
            line = scanner.nextLine();//读取这一行
           
			//如果line.length=0, 即用户没有输入任何内容，直接回车
			if (line.length() == 0) {
                if (blankReturn) return line;//如果blankReturn=true,可以返回空串
                else continue; //如果blankReturn=false,不接受空串，必须输入内容
            }

			//如果用户输入的内容大于了 limit，就提示重写输入  
			//如果用户如的内容 >0 <= limit ,我就接受
            if (line.length() < 1 || line.length() > limit) {
                System.out.print("输入长度（不能大于" + limit + "）错误，请重新输入：");
                continue;
            }
            break;
        }

        return line;
    }
}

package com.zhou.java.Houserent.View;

import com.zhou.java.Houserent.Service.HouseService;
import com.zhou.java.Houserent.domain.House;
import com.zhou.java.Houserent.utils.Utility;

public class HouseView {
    private boolean loop = true;// 判断循环是否结束
    private char key = ' ';// 输入
    private HouseService houseService = new HouseService(10);// 给数组定大小

    //    数据通过list展示
    public void listHouse() {
        System.out.println("=================房屋列表=================");
        System.out.println("编号\t\t房主\t\t电话\t\t地址\t\t\t\t月租\t\t\t\t状态(出租/未出租)");

        House[] houses = houseService.list();
        for (int i = 0; i < houses.length; i++) {
            if (houses[i] == null) {
                break;
            }
            System.out.println(houses[i]);
        }
        System.out.println("=================房屋列表结束=================");
    }

    //    添加房屋
    public void addHouse() {
        System.out.println("=================添加房屋=================");
        System.out.print("姓名: ");
        String name = Utility.readString(10);
        System.out.print("电话: ");
        String phone = Utility.readString(10);
        System.out.print("地址: ");
        String address = Utility.readString(10);
        System.out.print("月租: ");
        String rent = Utility.readString(10);
        System.out.print("状态(未出租/已出租): ");
        String state = Utility.readString(3);
        House newHouse = new House(0, name, phone, address, rent, state);
        if (houseService.add(newHouse)) {
            System.out.println("=================添加完成=================");
        } else {
            System.out.println("=================添加失败=================");
        }
    }
//      查询房屋
    public void findHouse(){
        System.out.println("=================查询房屋=================");
        System.out.println("请输入你查询地区: ");
        int findId =Utility.readInt(10);
        House house = houseService.find(findId);
        if (house != null){
            System.out.println(house);
        }else {
            System.out.println("你输入的房屋编号没有房屋信息");
        }


    }
    //    删除房屋
    public void deleteHouse() {
        System.out.println("=================删除房屋=================");
        System.out.println("请输入删除房屋序号(-1退出): ");
        int delId = Utility.readInt();
        if (delId == -1) {
            System.out.println("=================放弃删除房屋=================");
            return;
        }
        char choice = Utility.readConfirmSelection();
        if (choice == 'Y') {
            if (houseService.delete(delId)){
                System.out.println("=================删除房屋成功=================");
            }else {
                System.out.println("=================房屋编号不存在，删除失败=================");
            }
        } else {
            System.out.println("=================放弃删除房屋=================");
        }

    }
//    修改
    public void updateHouse(){
        System.out.println("=================修改房屋信息=================");
        System.out.println("请输入修改房屋序号(-1退出): ");
        int updateId = Utility.readInt();
        if (updateId ==-1){
            System.out.println("你放弃修改房屋信息");
            return;
        }
        House house = houseService.find(updateId);
        if (house ==null){
            System.out.println("修改房屋信息编号不存在");
            return;
        }
        System.out.print("姓名("+house.getName()+"): ");
        String name = Utility.readString(8, "");
        if (!"".equals(name)){
            house.setName(name);
        }
        System.out.print("电话("+house.getPhone()+"): ");
        String phone= Utility.readString(8, "");
        if (!"".equals(phone)){
            house.setPhone(phone);
        }
        System.out.print("地址("+house.getAddress()+"): ");
        String address = Utility.readString(8, "");
        if (!"".equals(address)){
            house.setAddress(address);
        }
        System.out.print("租金("+house.getRent()+"): ");
        String rent = Utility.readString(8, "");
        if (!"".equals(rent)){
            house.setRent(rent);
        }
        System.out.print("状态("+house.getState()+"): ");
        String state = Utility.readString(8, "");
        if (!"".equals(state)){
            house.setState(state);
        }
        System.out.println("房屋信息修改成功");
    }
//    退出
    public void exit(){
        char exit = Utility.readConfirmSelection();
        if (exit=='Y'){
            loop =false;
        }
    }
//主菜单
    public void HouseMenu() {
        do {
            System.out.println("\n===============房屋出租系统菜单===============");
            System.out.println("\t\t\t\t1.新增房源");
            System.out.println("\t\t\t\t2.查找房源");
            System.out.println("\t\t\t\t3.删除房源");
            System.out.println("\t\t\t\t4.修改房屋信息");
            System.out.println("\t\t\t\t5.房屋列表");
            System.out.println("\t\t\t\t6.退   出");
            System.out.println("请输入你的选择(1-6):");
            key = Utility.readChar();
            switch (key) {
                case '1':
                    addHouse();
                    break;
                case '2':
                    findHouse();
                    break;
                case '3':
                    deleteHouse();
                    break;
                case '4':
                    updateHouse();
                    break;
                case '5':
                    listHouse();
                    break;
                case '6':
                    exit();
                    break;
                default:
                    System.out.println("输入错误，请重新输入");
            }

        } while (loop);
    }

}

package com.zhou.java.Houserent;

import com.zhou.java.Houserent.View.HouseView;

public class HouseTest {
    public static void main(String[] args) {
        new HouseView().HouseMenu();
        System.out.println("成功退出系统 ");
    }
}