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This article introduces the relevant knowledge of "how to use Java to realize the housing rental system". In the operation of the actual case, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Catalogue

HouseView

House_Sevice

House

App

Summary

HouseViewpackage house.view;import house.model.House;import house.sevice.house_Sevice;import house.tool.Utility;import java.util.Scanner;/** * 1 display interface * 2 receives user input * 3 calls houseService to complete various inputs of housing information * / public class houseView {private boolean loop=true; private char key='' / / write addhouse (), receive input, create addhouse object, call add method public void addhouse () {System.out.println ("- add house -"); System.out.print ("name:"); String name=Utility.readString (6); System.out.print ("phone:"); int phone=Utility.readInt (12) System.out.print ("address:"); String address=Utility.readString (14); System.out.print ("monthly rent:"); int rent=Utility.readInt (); System.out.print ("status:"); String state=Utility.readString (3); / / Note that id is the House newhouse=new House assigned by the system. If (house_sevice.add (newhouse)) {System.out.println ("add house succeeded");} else {System.out.println ("failed to add house");}} / / find house public void find () {System.out.println ("- find house -") System.out.print ("Please enter the house number you are looking for:"); int f=Utility.readInt (); if (house_sevice.Find (f) = = null) {System.out.println ("No information about the house found") } else {System.out.println ("numbered landlord\ t phone\ t address\ t monthly rent\ t status (rental / non-rental)\ n" + house_sevice.Find (f)) }} / / write the delhosue method, receive the input id, call service's del method public void delhouse () {System.out.println ("- delete house -"); System.out.print ("Please enter the house number to be deleted (- 1 exit):"); int delid=Utility.readInt () If (delid==-1) {System.out.println ("- exit delete -"); return;} char c=Utility.readConfirmSelection () / / call this method and loop until the user enters y or n if (cased deleted successfully Y') {if (house_sevice.del (delid)) {System.out.println ("- deleted successfully -") } else {System.out.println ("- deletion failed -");}} else {System.out.println ("- exit deletion -"); return }} / / modify housing information public void update () {System.out.println ("- modify housing information -"); System.out.print ("Please enter the house number to be modified (- 1 exit):"); int up=Utility.readInt () If (up==-1) {System.out.println ("- exit modification -"); return;} house_sevice.updata (up); System.out.println ("- modified successfully -") } / / display the housing list private house_Sevice house_sevice=new house_Sevice (10); / / set the array size to 10 public void listHouse () {System.out.println ("- House Rental list -"); System.out.println ("numbered landlord\ t phone\ t address\ t monthly rent\ t status (rental / non-rental)") House [] houses=house_sevice.list (); / / get information about all houses for (int I = 0; I

< houses.length; i++) { if(houses[i]==null){ break; } System.out.println(houses[i]); } } //主菜单 public void main_menu(){ do{ System.out.println("---------房屋出租系统-------"); System.out.println("\t\t1 新 增 房 源"); System.out.println("\t\t2 查 找 房 屋"); System.out.println("\t\t3 删 除 房 屋"); System.out.println("\t\t4 修 改 房 屋 信 息"); System.out.println("\t\t5 房 屋 列 表"); System.out.println("\t\t6 退 出"); System.out.print("请输入你的选择:"); key= Utility.readChar(); switch (key){ case '1': addhouse(); break; case '2': find(); break; case '3': delhouse(); break; case '4': update(); break; case '5': listHouse(); break; case '6': char n=Utility.readConfirmSelection(); if(n=='Y'){ loop=false; } break; default: System.out.println("输入错误!"); } }while (loop); }}house_Sevicepackage house.sevice;import house.model.House;import house.tool.Utility;/** * house_Sevice.java 类 [业务层] * //定义house[],保存house对象 * 1 响应houseView的调用 * 2 完成对房屋信息的各种操作(增删改查) */public class house_Sevice { private House[] houses;//保存house对象 private int nums=3;//记录数组内的房屋个数 private int count=3;//id //初始化房屋列表 public house_Sevice(int size){//传入数组大小 houses=new House[size]; houses[0]=new House(1,"Morty",1020,"纽约",111,"未出租"); houses[1]=new House(2,"莱月昴",1021,"东京",222,"未出租"); houses[2]=new House(3,"李星云",1022,"洛阳",333,"未出租"); } public House[] list(){ return houses;//因为重写了tostring } //添加房屋信息 public boolean add(House newhouse){ if(nums==houses.length){ return false; }else { houses[nums++]=newhouse; newhouse.setId(++count);//id自增长机制，更新newhouse的id return true; } } //删除房屋 public boolean del(int Id){ //找到要删除房屋信息元素对应的下标 int index=-1; for (int i = 0; i < nums; i++) { if(Id==houses[i].getId()){ index=i; } } if(index==-1){ return false; } for (int i = index; i < houses.length-1; i++) { houses[i]=houses[i+1];//将该位置之后的元素前移覆盖 } houses[--nums]=null;//将数组长度减一并将最后一个元素置空 return true; } //查找房屋 public House Find(int id){ //找到要查找房屋信息元素对应的下标 for (int i = 0; i < nums; i++) { if(id==houses[i].getId()){ return houses[i]; } } return null; } //修改房屋信息 public void updata(int up){ House house=Find(up); if(house==null){ System.out.println("该房屋不存在"); }else { System.out.print("姓名:("+house.getName()+"):"); String name= Utility.readString(8,"");//用户如果直接回车代表不修改，默认值为"" if(!name.equals("")){ house.setName(name);//将用户输入的name覆盖原来的name } System.out.print("手机号:("+house.getPhone()+"):"); int phone=Utility.readInt(0);//用户如果直接回车代表不修改,默认值为0 if(!(phone==0)){ house.setPhone(phone);//将用户输入的name覆盖原来的name } System.out.print("地址:("+house.getAddress()+"):"); String address=Utility.readString(8,""); if(!address.equals("")){ house.setAddress(address); } System.out.print("月租:("+house.getRent()+"):"); int rent=Utility.readInt(0); if(!(rent==0)){ house.setRent(rent); } System.out.print("状态:("+house.getState()+"):"); String state=Utility.readString(8,""); if(!state.equals("")){ house.setState(state);// } } }}Housepackage house.model;/** * house类的对象表示一个房屋的信息 */public class House { //编号 房主 电话 地址 月租 状态(出租/未出租) private int id; private String name; private int phone; private String address; private int rent; private String state; public House(int id, String name, int phone, String address, int 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 int getPhone() { return phone; } public void setPhone(int phone) { this.phone = phone; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public int getRent() { return rent; } public void setRent(int rent) { this.rent = rent; } public String getState() { return state; } public void setState(String state) { this.state = state; } @Override public String toString() { return id +"\t" +name +"\t" +phone +"\t" +address +"\t\t"+rent +"\t\t"+state; }}Apppackage house.view;import house.model.House;public class App { public static void main(String[] args) { //创建View对象，并显示主菜单，是整个程序的入口 new houseView().main_menu();//创建一个虚拟对象调用显示主菜单的方法 System.out.println("程序已退出"); }}

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