Java 练习(模板方法设计模式TemplateMethod)

编写工资系统，实现不同类型员工(多态)的按月发放工资。如果当月出现某个Employee对象的生日，则将该雇员的工资增加100元。
实验说明:
(1) 定义一个Employee类，该类包含:
private 成员变量 name,number,birthday，其中 birthday 为 MyDate 类的对象;
abstract 方法 earnings();
toString()方法输出对象的 name,number和birthday。
(2) MyDate类包含:
private 成员变量 year,month,day ;
toDateString()方法返回日期对应的字符串:xxxx年xx月xx日
(3) 定义 SalariedEmployee 类继承 Employee 类，实现按月计算工资的员工处理。该类包括:private 成员变量monthlySalary;
实现父类的抽象方法 earnings(),该方法返回 monthlySalary 值; toString()方法输出员工类型信息及员工的name,number,birthday。
(4) 参照 SalariedEmbloyee 类定义 HourlyEmployee 类，实现按小时计算工资的员工处理。该类包括:
private成员变量 wage 和 hour;
实现父类的抽象方法 earnings(),该方法返回 wage*hour 值;
toString()方法输出员工类型信息及员工的 name,number,birthday。
(5) 定义 PayrollSystem 类，创建 Employee 变量数组并初始化，该数组存放各类雇员对象的引用。利用循环结构遍历数组元素，输出各个对象的类型,name,number,birthday,以及该对象生日。当键盘输入本月月份值时，如果本月是某个Employee对象的生日，还要输出增加工资信息。

MyDate.java

package com.klvchen.exer2;

public class MyDate {
	private int year;
	private int month;
	private int day;
	
	public MyDate(int year, int month, int day) {
		super();
		this.year = year;
		this.month = month;
		this.day = day;
	}

	public int getYear() {
		return year;
	}

	public void setYear(int year) {
		this.year = year;
	}

	public int getMonth() {
		return month;
	}

	public void setMonth(int month) {
		this.month = month;
	}

	public int getDay() {
		return day;
	}

	public void setDay(int day) {
		this.day = day;
	}

	public String toDateString() {
		return year + "年" + month + "月" + day + "日";
	}

}

Employee.java

package com.klvchen.exer2;

public abstract class Employee {
	private String name;
	private int number;
	private MyDate birthday;

	public Employee(String name, int number, MyDate birthday) {
		super();
		this.name = name;
		this.number = number;
		this.birthday = birthday;
	}

	public String getName() {
		return name;
	}

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

	public int getNumber() {
		return number;
	}

	public void setNumber(int number) {
		this.number = number;
	}

	public MyDate getBirthday() {
		return birthday;
	}

	public void setBirthday(MyDate birthday) {
		this.birthday = birthday;
	}
	
	public abstract double earnings();
	
	@Override
	public String toString() {
		return "name=" + name + ", number=" + number + ", birthday=" + birthday.toDateString() + "]";
	}

}

SalariedEmployee.java

package com.klvchen.exer2;

public class SalariedEmployee extends Employee {
	private double monthlySalary;  //月工资

	public SalariedEmployee(String name, int number, MyDate birthday) {
		super(name, number, birthday);
	}
	
	public SalariedEmployee(String name, int number, MyDate birthday, double monthlySalary) {
		super(name, number, birthday);
		this.monthlySalary = monthlySalary;
	}

	public double getMonthlySalary() {
		return monthlySalary;
	}

	public void setMonthlySalary(double monthlySalary) {
		this.monthlySalary = monthlySalary;
	}

	@Override
	public double earnings() {
		return monthlySalary;
	}
	
	public String toString() {
		return "SalariedEmployee[" + super.toString() + "]";
	}

}

HourlyEmployee.java

package com.klvchen.exer2;

public class HourlyEmployee extends Employee {
	
	private int wage; //每小时的工资
	private int hour; //月工资的小时数

	public HourlyEmployee(String name, int number, MyDate birthday) {
		super(name, number, birthday);
	}
	
	public HourlyEmployee(String name, int number, MyDate birthday, int wage, int hour) {
		super(name, number, birthday);
		this.wage = wage;
		this.hour = hour;
	}

	public int getWage() {
		return wage;
	}

	public void setWage(int wage) {
		this.wage = wage;
	}

	public int getHour() {
		return hour;
	}

	public void setHour(int hour) {
		this.hour = hour;
	}

	@Override
	public double earnings() {
		return wage * hour;
	}
	
	public String toString() {
		return "HourlyEmployee [" + super.toString() + "]";
	}
}

PayrollSystem.java

package com.klvchen.exer2;

import java.util.Calendar;
import java.util.Scanner;

public class PayrollSystem {
	public static void main(String[] args) {
		//方式一:
//		Scanner scanner = new Scanner(System.in);
//		System.out.println("请输入当月的月份：");
//		int month = scanner.nextInt();
		
		//方式二
		Calendar calendar = Calendar.getInstance();
		int month = calendar.get(Calendar.MONTH); //获取当前的月份
		
		Employee[] emps = new Employee[2];
		
		emps[0] = new SalariedEmployee("马森", 1002, new MyDate(1992, 2, 28), 10000);
		emps[1] = new HourlyEmployee("潘先生", 2001, new MyDate(1991, 3, 15), 60, 240);

		for(int i = 0; i < emps.length; i++) {
			System.out.println(emps[i]);
			double salary = emps[i].earnings();
			System.out.println("月工资为: " + salary);
			
			if(month+1 == emps[i].getBirthday().getMonth()) {
				System.out.println("生日快乐！ 奖励100元");
			}
			System.out.println("---------------------------");
		}
	}

}