二、代码实现：

(1)基础版(控制台调试)：

car类：

package com.xiaoyao.car;

import java.util.List;

public class Car{

private int id;//租车序号

private int typeId;//租车分类下的序号

private String name;//租车名字

private double price;//租车单价

private int personLoad;//载客量；

private double goodsLoad;//载货量；

private List carList;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public int getTypeId() {

return typeId;

}

public void setTypeId(int typeId) {

this.typeId = typeId;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public double getPrice() {

return price;

}

public void setPrice(double price) {

this.price = price;

}

public int getPersonLoad() {

return personLoad;

}

public void setPersonLoad(int personLoad) {

this.personLoad = personLoad;

}

public double getGoodsLoad() {

return goodsLoad;

}

public void setGoodsLoad(double goodsLoad) {

this.goodsLoad = goodsLoad;

}

public List getCarList() {

return carList;

}

public void setCarList(List carList) {

this.carList = carList;

}

}

carWithPerson类：

package com.xiaoyao.car;

import java.util.List;

public class CarWithPerson extends Car {

private List personCarList;

public CarWithPerson(int id, int typeId, String carName, double carPrice,int withPerson) {

// TODO Auto-generated constructor stub

super.setId(id);

super.setTypeId(typeId);

super.setName(carName);

super.setPrice(carPrice);

super.setPersonLoad(withPerson);

}

public List getPersonCarList() {

return personCarList;

}

public void setPersonCarList(List personCarList) {

this.personCarList = personCarList;

}

}

carWithGoods类：

package com.xiaoyao.car;

import java.util.List;

public class CarWithGoods extends Car {

private List goodsCarList;

public CarWithGoods(int id, int typeId, String carName, double carPrice, double withGoods) {

// TODO Auto-generated constructor stub

super.setId(id);

super.setTypeId(typeId);

super.setName(carName);

super.setPrice(carPrice);

super.setGoodsLoad(withGoods);

}

public List getGoodsCarList() {

return goodsCarList;

}

public void setGoodsCarList(List goodsCarList) {

this.goodsCarList = goodsCarList;

}

}

carWithPersonAndGoods类：

package com.xiaoyao.car;

import java.util.List;

public class CarWithGoods extends Car {

private List goodsCarList;

public CarWithGoods(int id, int typeId, String carName, double carPrice, double withGoods) {

// TODO Auto-generated constructor stub

super.setId(id);

super.setTypeId(typeId);

super.setName(carName);

super.setPrice(carPrice);

super.setGoodsLoad(withGoods);

}

public List getGoodsCarList() {

return goodsCarList;

}

public void setGoodsCarList(List goodsCarList) {

this.goodsCarList = goodsCarList;

}

}

test类

package com.xiaoyao.car;

import java.util.Iterator;

import java.util.LinkedList;

import java.util.Scanner;

public class test extends Car {

public static void main(String[] args) {

// 问答：

Scanner sc = new Scanner(System.in);

System.out.println("欢迎使用租车系统，您是否要租车？");

System.out.println("是：请输入1；否：请输入0；");

int num = sc.nextInt();

if (num != 1) {

System.out.println("欢迎下次光临");

System.exit(0);

} else {

}

// 输入租车时间：

System.out.println("请输入租车天数");

int days = sc.nextInt();

// 选择车辆类型：

System.out.println("请选择车辆类型：0:全部显示；1：载人车；2：载货车；3：皮卡车；");

int carType = sc.nextInt();

// 输出可租车信息：

System.out.println("您可租车的类型及其价目表：");

System.out.println("序号 汽车名称 租金 容量");

// 录入车辆信息：

LinkedList personCar = new LinkedList();

LinkedList goodsCar = new LinkedList();

LinkedList personAndGoodsCar = new LinkedList();

LinkedList cars = new LinkedList();

CarWithPerson personCar1 = new CarWithPerson(1, 1, "奥迪A4", 500.0, 4),

personCar2 = new CarWithPerson(2, 2,"马自达6", 400.0, 4),

personCar3 = new CarWithPerson(3, 3,"金龙", 800.0, 20);

CarWithGoods freightCar1 = new CarWithGoods(4, 1,"松花江", 400.0, 4.0),

freightCar2 = new CarWithGoods(5, 2,"依维河", 1000.0, 20.0);

CarWithPersonAndGoods personAndFreightCar1 = new CarWithPersonAndGoods(6, 1,"皮卡雪6", 450.0, 4, 2.0);

goodsCar.add(freightCar1);

goodsCar.add(freightCar2);

personCar.add(personCar1);

personCar.add(personCar2);

personCar.add(personCar3);

personAndGoodsCar.add(personAndFreightCar1);

cars.addAll(personCar);

cars.addAll(goodsCar);

cars.addAll(personAndGoodsCar);

int carsNumber = cars.size();

int goodsCarNumber = goodsCar.size();

int personCarNumber = personCar.size();

int personAndGoodsCarNumber = personAndGoodsCar.size();

//展示车辆

switch (carType) {

case 0:

// 全部展示：

System.out.println("共有" + carsNumber + "辆可租车");

for (int i = 0; i < carsNumber; i++) {

Car allCar = cars.get(i);

System.out.println(allCar.getId()+ ". " + " " + allCar.getName() + " " + allCar.getPrice() + "元/天 " + allCar.getPersonLoad() + "人 " + allCar.getGoodsLoad()+"吨 ");

}

System.out.println("请选择车辆序号：");

int carId = sc.nextInt();

int thereId = carId-1;

System.out.println("请输入租车数量：");

int number = sc.nextInt();

System.out.println("订单");

System.out.println("车辆：" + cars.get(thereId).getName()+ "\n数量：" + number + "辆；\n单价：" + cars.get(thereId).getPrice() + "元/天；\n天数：" + days+"天； \n总载货："+ cars.get(thereId).getGoodsLoad()*number + "吨 \n总载人： "+cars.get(thereId).getPersonLoad()*number+"人");

System.out.println("合计总价："+cars.get(thereId).getPrice()*days*number + "元。");

break;

case 1:

//展示载客车：

System.out.println("共有" + personCarNumber + "辆载客车");

for (int i = 0; i < personCarNumber; i++) {

Car allCar = cars.get(i);

System.out.println((allCar.getId())+ ".\t" +allCar.getName() + "\t\t" + allCar.getPrice() + "元/天 \t" + allCar.getPersonLoad() + "人 \t ");

}

System.out.println("请选择车辆序号：");

int carId1 = sc.nextInt();

int thereId1 = carId1-1;

System.out.println("请输入租车数量：");

int number1 = sc.nextInt();

System.out.println("订单");

System.out.println("车辆：" + cars.get(thereId1).getName()+ "\n数量：" + number1 + "辆；\n单价：" + cars.get(thereId1).getPrice() + "元/天；\n天数：" + days+"天； \n总载人："+cars.get(thereId1).getPersonLoad()*number1+"人");

System.out.println("合计总价："+cars.get(thereId1).getPrice()*days*number1 + "元。");

break;

case 2:

// 展示载货车：

System.out.println("共有" + goodsCarNumber + "辆载货车");

for (int i = personCarNumber; i < goodsCarNumber+personCarNumber; i++) {

Car allCar = cars.get(i);

System.out.println((allCar.getId()-personCarNumber)+ ".\t" +allCar.getName() + "\t\t" + allCar.getPrice() + "元/天 \t" + allCar.getGoodsLoad() + "吨 \t ");

}

System.out.println("请选择车辆序号：");

int carId2 = sc.nextInt();

int thereId2 = carId2-1+personCarNumber;

System.out.println("请输入租车数量：");

int number2 = sc.nextInt();

System.out.println("订单");

System.out.println("车辆：" + cars.get(thereId2).getName()+ "\n数量：" + number2 + "辆；\n单价：" + cars.get(thereId2).getPrice() + "元/天；\n天数：" + days+"天； \n总载货："+ cars.get(thereId2).getGoodsLoad()*number2 + "吨 \t ");

System.out.println("合计总价："+cars.get(thereId2).getPrice()*days*number2 + "元。");

break;

case 3:

// 展示皮卡车：

System.out.println("共有" + personAndGoodsCarNumber + "辆皮卡车");

for (int i = goodsCarNumber+personCarNumber; i < personCarNumber+goodsCarNumber+personAndGoodsCarNumber; i++) {

Car allCar = cars.get(i);

System.out.println((allCar.getId()-goodsCarNumber-personCarNumber)+ ".\t" +allCar.getName() + "\t\t" + allCar.getPrice() + "元/天 \t" + allCar.getPersonLoad() + "人 \t "+ allCar.getGoodsLoad() + "吨 \t ");

}

System.out.println("请选择车辆序号：");

int carId3 = sc.nextInt();

int thereId3 = carId3-1+personCarNumber+goodsCarNumber;

System.out.println("请输入租车数量：");

int number3 = sc.nextInt();

System.out.println("订单");

System.out.println("车辆：" + cars.get(thereId3).getName()+ "\n数量：" + number3 + "辆；\n单价：" + cars.get(thereId3).getPrice() + "元/天；\n时间：" + days+"天； \n总载人："+cars.get(thereId3).getPersonLoad()*number3+"人； \n总载货："+cars.get(thereId3).getGoodsLoad()*number3+"吨；");

System.out.println("合计总价："+cars.get(thereId3).getPrice()*days*number3 + "元。");

break;

default:

System.out.println("请正确输入指令：1 or 2 or 3");

}

}

}

结果展示：

全部车：

分类展示车：

(2)修改版(页面展示)：