Java 部门管理实现指南

1. 流程概述

为实现 Java 部门管理系统，我们需要按照以下步骤进行操作：

步骤 操作
1 创建部门类 Department
2 创建员工类 Employee
3 创建部门管理类 DepartmentManager
4 在主程序中实例化部门和员工对象，调用部门管理类进行操作

2. 具体步骤及代码实现

步骤1：创建部门类 Department

// 创建部门类 Department
public class Department {
    private String name;
    private int id;

    // 构造方法
    public Department(String name, int id) {
        this.name = name;
        this.id = id;
    }

    // getter 和 setter 方法
    public String getName() {
        return name;
    }

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

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
}

步骤2：创建员工类 Employee

// 创建员工类 Employee
public class Employee {
    private String name;
    private int id;
    private Department department;

    // 构造方法
    public Employee(String name, int id, Department department) {
        this.name = name;
        this.id = id;
        this.department = department;
    }

    // getter 和 setter 方法
    public String getName() {
        return name;
    }

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

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public Department getDepartment() {
        return department;
    }

    public void setDepartment(Department department) {
        this.department = department;
    }
}

步骤3：创建部门管理类 DepartmentManager

// 创建部门管理类 DepartmentManager
public class DepartmentManager {
    public void assignDepartment(Employee employee, Department department) {
        employee.setDepartment(department);
        System.out.println("Assign department " + department.getName() + " to employee " + employee.getName());
    }

    public void changeDepartment(Employee employee, Department newDepartment) {
        Department oldDepartment = employee.getDepartment();
        employee.setDepartment(newDepartment);
        System.out.println("Change department from " + oldDepartment.getName() + " to " + newDepartment.getName() + " for employee " + employee.getName());
    }
}

步骤4：在主程序中实例化对象并调用部门管理类

public class Main {
    public static void main(String[] args) {
        // 创建部门
        Department department1 = new Department("IT", 1);
        Department department2 = new Department("HR", 2);

        // 创建员工
        Employee employee1 = new Employee("Alice", 101, department1);
        Employee employee2 = new Employee("Bob", 102, department2);

        // 创建部门管理类
        DepartmentManager manager = new DepartmentManager();

        // 分配部门
        manager.assignDepartment(employee1, department2);

        // 更改部门
        manager.changeDepartment(employee2, department1);
    }
}

饼状图展示

pie
    title 部门管理系统功能分配
    "创建部门类 Department" : 25
    "创建员工类 Employee" : 25
    "创建部门管理类 DepartmentManager" : 25
    "主程序实例化对象并调用部门管理类" : 25

通过以上步骤，你可以成功实现 Java 部门管理系统。祝你学习顺利！