Java数组实现员工管理系统：增、删、改、查功能

以下是基于数组存储的员工管理系统的Java代码，实现了增加、查找、修改和删除员工的功能。输出语句为中文，方便用户理解。

import java.util.Scanner;

public class EmployeeManagementSystem {
    private static final int MAX_EMPLOYEES = 100; // 最大员工数
    private static Employee[] employees = new Employee[MAX_EMPLOYEES]; // 员工数组
    private static int employeeCount = 0; // 当前员工数

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        boolean exit = false; // 是否退出系统
        while (!exit) {
            System.out.println('请选择操作：');
            System.out.println('1. 增加员工');
            System.out.println('2. 查找员工');
            System.out.println('3. 修改员工');
            System.out.println('4. 删除员工');
            System.out.println('5. 退出系统');
            int option = scanner.nextInt();
            switch (option) {
                case 1:
                    addEmployee(scanner);
                    break;
                case 2:
                    findEmployee(scanner);
                    break;
                case 3:
                    updateEmployee(scanner);
                    break;
                case 4:
                    deleteEmployee(scanner);
                    break;
                case 5:
                    exit = true;
                    break;
                default:
                    System.out.println('无效操作，请重新选择。');
                    break;
            }
        }
    }

    // 增加员工
    private static void addEmployee(Scanner scanner) {
        if (employeeCount >= MAX_EMPLOYEES) {
            System.out.println('员工数量已达上限，无法继续增加。');
            return;
        }
        System.out.println('请输入员工姓名：');
        String name = scanner.next();
        System.out.println('请输入员工工号：');
        int id = scanner.nextInt();
        System.out.println('请输入员工职位：');
        String position = scanner.next();
        System.out.println('请输入员工工资：');
        double salary = scanner.nextDouble();
        Employee employee = new Employee(name, id, position, salary);
        employees[employeeCount] = employee;
        employeeCount++;
        System.out.println('员工添加成功。');
    }

    // 查找员工
    private static void findEmployee(Scanner scanner) {
        System.out.println('请输入要查找的员工工号：');
        int id = scanner.nextInt();
        for (int i = 0; i < employeeCount; i++) {
            Employee employee = employees[i];
            if (employee.getId() == id) {
                System.out.println('员工姓名：' + employee.getName());
                System.out.println('员工工号：' + employee.getId());
                System.out.println('员工职位：' + employee.getPosition());
                System.out.println('员工工资：' + employee.getSalary());
                return;
            }
        }
        System.out.println('未找到该员工。');
    }

    // 修改员工
    private static void updateEmployee(Scanner scanner) {
        System.out.println('请输入要修改的员工工号：');
        int id = scanner.nextInt();
        for (int i = 0; i < employeeCount; i++) {
            Employee employee = employees[i];
            if (employee.getId() == id) {
                System.out.println('请输入员工姓名（原值：' + employee.getName() + '）：');
                String name = scanner.next();
                System.out.println('请输入员工职位（原值：' + employee.getPosition() + '）：');
                String position = scanner.next();
                System.out.println('请输入员工工资（原值：' + employee.getSalary() + '）：');
                double salary = scanner.nextDouble();
                employee.setName(name);
                employee.setPosition(position);
                employee.setSalary(salary);
                System.out.println('员工修改成功。');
                return;
            }
        }
        System.out.println('未找到该员工。');
    }

    // 删除员工
    private static void deleteEmployee(Scanner scanner) {
        System.out.println('请输入要删除的员工工号：');
        int id = scanner.nextInt();
        for (int i = 0; i < employeeCount; i++) {
            if (employees[i].getId() == id) {
                for (int j = i + 1; j < employeeCount; j++) {
                    employees[j - 1] = employees[j];
                }
                employees[employeeCount - 1] = null;
                employeeCount--;
                System.out.println('员工删除成功。');
                return;
            }
        }
        System.out.println('未找到该员工。');
    }
}

class Employee {
    private String name; // 姓名
    private int id; // 工号
    private String position; // 职位
    private double salary; // 工资

    public Employee(String name, int id, String position, double salary) {
        this.name = name;
        this.id = id;
        this.position = position;
        this.salary = salary;
    }

    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 String getPosition() {
        return position;
    }

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

    public double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }
}

本代码使用了类和对象的概念，将员工信息封装在Employee类中，定义了增加、查找、修改和删除员工的方法，并且使用了数组存储员工数据。通过命令行输入，实现了简单的交互式操作。