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OcpTest.java
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OcpTest.java
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package com.liebrother.designpatterns.ocp;
import java.math.BigDecimal;
public class OcpTest {
public static void main(String[] args) {
Hospital hospital = new Hospital();
IPatient xiaoMing = new Patient("小明");
hospital.sellMedicine(xiaoMing);
IPatient xiaoHong = new OneLevelSocialSecurityPatient("小红");
hospital.sellMedicine(xiaoHong);
IPatient xiaoHua = new TwoLevelSocialSecurityPatient("小花");
hospital.sellMedicine(xiaoHua);
IPatient xiaoJie = new ThreeLevelSocialSecurityPatient("小杰");
hospital.sellMedicine(xiaoJie);
}
}
class Medicine {
private String name;
private BigDecimal price;
public Medicine(String name, BigDecimal price) {
this.name = name;
this.price = price;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
}
class Hospital {
private Medicine medicine = new Medicine("阿司匹林", new BigDecimal(20));
public void sellMedicine(IPatient patient) {
BigDecimal money = patient.pay(medicine);
System.out.println(patient.getName() + " 花了 " + money.setScale(2, BigDecimal.ROUND_UP) + " 块钱买了药:" + medicine.getName());
}
}
interface IPatient {
String getName();
BigDecimal pay(Medicine medicine);
}
class Patient implements IPatient{
private String name;
public Patient(String name) {
this.name = name;
}
@Override
public BigDecimal pay(Medicine medicines) {
return medicines.getPrice();
}
@Override
public String getName() {
return name;
}
}
/**
* 小红的实现
*/
/*
class Medicine {
private String name;
private BigDecimal price;
public Medicine(String name, BigDecimal price) {
this.name = name;
this.price = price;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public BigDecimal getPrice() {
return price;
}
public BigDecimal getPrice1() {
return price.multiply(new BigDecimal(0.7));
}
public BigDecimal getPrice2() {
return price.multiply(new BigDecimal(0.8));
}
public BigDecimal getPrice3() {
return price.multiply(new BigDecimal(0.9));
}
public void setPrice(BigDecimal price) {
this.price = price;
}
}
*/
/**
* 小花的实现
*/
/*
class Patient implements IPatient{
private String name;
private int level;
public Patient(String name) {
this.name = name;
}
@Override
public BigDecimal pay(Medicine medicines) {
if (level == 1) {
return medicines.getPrice().multiply(new BigDecimal(0.7));
} else if (level == 2) {
return medicines.getPrice().multiply(new BigDecimal(0.8));
} else if (level == 3) {
return medicines.getPrice().multiply(new BigDecimal(0.9));
}
return medicines.getPrice();
}
@Override
public String getName() {
return name;
}
}
*/
/**
* 小明的实现
*/
class OneLevelSocialSecurityPatient implements IPatient {
private String name;
public OneLevelSocialSecurityPatient(String name) {
this.name = name;
}
@Override
public BigDecimal pay(Medicine medicine) {
return medicine.getPrice().multiply(new BigDecimal(0.7));
}
@Override
public String getName() {
return this.name;
}
}
class TwoLevelSocialSecurityPatient implements IPatient {
private String name;
public TwoLevelSocialSecurityPatient(String name) {
this.name = name;
}
@Override
public BigDecimal pay(Medicine medicine) {
return medicine.getPrice().multiply(new BigDecimal("0.8"));
}
@Override
public String getName() {
return this.name;
}
}
class ThreeLevelSocialSecurityPatient implements IPatient {
private String name;
public ThreeLevelSocialSecurityPatient(String name) {
this.name = name;
}
@Override
public BigDecimal pay(Medicine medicine) {
return medicine.getPrice().multiply(new BigDecimal("0.9"));
}
@Override
public String getName() {
return this.name;
}
}