Java项目实践: 员工管理系统的继承模式

**Employee类**

public class Employee {
    private int employeeID;
    private String name;
    private String position;
    private int leaveDays;
    private double basicSalary;

    public Employee(int employeeID, String name, String position, int leaveDays, double basicSalary) {
        this.employeeID = employeeID;
        this.name = name;
        this.position = position;
        this.leaveDays = leaveDays;
        this.basicSalary = basicSalary;
    }
    public int getEmployeeID() {
        return employeeID;
    }

    public void setEmployeeID(int employeeID) {
        this.employeeID = employeeID;
    }

    public String getName() {
        return name;
    }

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

    public String getPosition() {
        return position;
    }

    public void setPosition(String position) {
        this.position = position;
    }

    public int getLeaveDays() {
        return leaveDays;
    }

    public void setLeaveDays(int leaveDays) {
        this.leaveDays = leaveDays;
    }

    public double getBasicSalary() {
        return basicSalary;
    }

    public void setBasicSalary(double basicSalary) {
        this.basicSalary = basicSalary;
    }
    public double calculateSalary(){
        return 0;
    }
}

**Manager类**

public class Manager extends Employee{
     public Manager(int employeeID, String name, String position, int leaveDays, double basicSalary){
          super(employeeID, name, position, leaveDays, basicSalary);
     }
     public double calculateSalary(){
          double salary = 0.0;
          salary=getBasicSalary()+getBasicSalary()*0.5+200-this.getLeaveDays()*(getBasicSalary()/30);
          return salary;
     }

}

**Director类**

public class Director extends Employee{
    public Director(int employeeID, String name, String position, int leaveDays, double basicSalary){
        super(employeeID, name, position, leaveDays, basicSalary);
    }
    public double calculateSalary(){
        double salary =0.0;
        salary= getBasicSalary()+getBasicSalary()*0.08+2000-this.getLeaveDays()*(getBasicSalary()/30);
        return salary;

    }
}

**Staff类**

public class Staff extends Employee{
    public Staff(int employeeID, String name, String position, int leaveDays, double basicSalary){
        super(employeeID, name, position, leaveDays, basicSalary);

    }
    public double calculateSalary(){
        double salary = 0.0;
        salary = getBasicSalary()+getBasicSalary()*0.1+1000-this.getLeaveDays()*(getBasicSalary()/30);
        return salary;
    }
}

**ServerManage类**

public class ServerManage {
    private Employee e1;
    public static int employeeCount = 0;
    public ServerManage(){
        employeeCount++;
    }
    public void addEmployee(int employeeID){
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入员工姓名");
        String name = scanner.next();
        System.out.println("请输入员工职务");
        String position = scanner.next();
        System.out.println("请输入请假天数");
        int leaveDays = scanner.nextInt();
        System.out.println("请输入基本工资");
        double basicSalary=scanner.nextDouble();
        scanner.close();
        if (position.equals("经理")){
            e1 = new Manager(employeeCount, name, position, leaveDays, basicSalary);
        } else if (position.equals("董事")) {
            e1 = new Director(employeeCount,name , position, leaveDays, basicSalary);
        }else{
            e1 =new Staff(employeeCount, name, position, leaveDays, basicSalary);
        }
        System.out.println("信息已录入");
        return;
    }
    public void display(){
        System.out.println("========员工信息如下:===========");
        System.out.println("员工ID: "+e1.getEmployeeID());
        System.out.println("员工姓名: "+e1.getName());
        System.out.println("员工职务: "+e1.getPosition());
        System.out.println("请假天数: "+e1.getLeaveDays());
        System.out.println("基本工资: "+e1.getBasicSalary());
        System.out.println("总计薪资: "+e1.calculateSalary());
        System.out.println("==============================");
    }
}

**Main类**

public class Main {
    public static void main(String[] args) {
        ServerManage serverManage = new ServerManage();
        serverManage.addEmployee(01);
        serverManage.display();
    }
}

**运行效果:**