import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;// 员工类
class Employee {private String id;private String name;private String department;private double salary;public Employee(String id, String name, String department, double salary) {this.id = id;this.name = name;this.department = department;this.salary = salary;}public String getId() {return id;}public String getName() {return name;}public String getDepartment() {return department;}public double getSalary() {return salary;}public void setName(String name) {this.name = name;}public void setDepartment(String department) {this.department = department;}public void setSalary(double salary) {this.salary = salary;}@Overridepublic String toString() {return "👤 员工信息 {" +"工号='" + id + '\'' +", 姓名='" + name + '\'' +", 部门='" + department + '\'' +", 工资=¥" + salary +'}';}
}// 工资管理系统类
public class SalaryManagementSystem {private static List<Employee> employees = new ArrayList<>();private static Scanner scanner = new Scanner(System.in);public static void main(String[] args) {login(); // 登录boolean exit = false;while (!exit) {displayMenu();int choice = scanner.nextInt();scanner.nextLine(); // Consume newline left-overswitch (choice) {case 1:addEmployee();break;case 2:deleteEmployee();break;case 3:updateEmployee();break;case 4:queryEmployee();break;case 5:showStatistics();break;case 6:exit = true;break;case 7:sortEmployeesBySalary();break;// 显示所有员工信息case 8:displayAllEmployees();break;default:System.out.println("❌ 请输入有效的选项！");break;}}System.out.println("👋 感谢使用工资管理系统！");}private static void sortEmployeesBySalary() {if (employees.isEmpty()) {System.out.println("⚠️ 当前没有员工信息！");return;}employees.sort(Comparator.comparingDouble(Employee::getSalary));System.out.println("✨ 员工信息按工资升序排序：");for (Employee emp : employees) {System.out.println(emp);}}// 显示所有员工信息private static void displayAllEmployees() {if (employees.isEmpty()) {System.out.println("⚠️ 当前没有员工信息！");return;}System.out.println("✨ 所有员工信息：");for (Employee emp : employees) {System.out.println(emp);}}// 登录功能，这里简单模拟，可以根据实际情况扩展private static void login() {System.out.println("=== 欢迎使用工资管理系统 ===");while (true) {System.out.print("🔑 请输入用户名：");String username = scanner.nextLine();System.out.print("🔑 请输入密码：");String password = scanner.nextLine();// 简单模拟用户名和密码if (username.equals("admin") && password.equals("admin")) {System.out.println("✅ 登录成功！");break;} else {System.out.println("❌ 用户名或密码错误，请重试！");}}}// 显示菜单private static void displayMenu() {System.out.println("\n请选择操作：");System.out.println("1. ➕ 增加员工信息");System.out.println("2. ➖ 删除员工信息");System.out.println("3. ✏️ 修改员工信息");System.out.println("4. 🔍 查询员工信息");System.out.println("5. 📊 查看统计信息");System.out.println("6. 退出系统");System.out.println("7. 🔄 按工资排序员工信息");System.out.println("8. 📜 显示所有员工信息");System.out.print("请输入数字选择操作：");}// 添加员工信息private static void addEmployee() {System.out.print("请输入员工工号：");String id = scanner.nextLine();System.out.print("请输入员工姓名：");String name = scanner.nextLine();System.out.print("请输入员工部门：");String department = scanner.nextLine();System.out.print("请输入员工工资：");double salary = scanner.nextDouble();scanner.nextLine(); // Consume newline left-overEmployee newEmployee = new Employee(id, name, department, salary);employees.add(newEmployee);System.out.println("✅ 员工信息添加成功！");}// 删除员工信息private static void deleteEmployee() {System.out.print("请输入要删除的员工工号：");String id = scanner.nextLine();boolean found = false;for (Employee emp : employees) {if (emp.getId().equals(id)) {employees.remove(emp);System.out.println("✅ 员工信息删除成功！");found = true;break;}}if (!found) {System.out.println("❌ 未找到该员工！");}}// 修改员工信息private static void updateEmployee() {System.out.print("请输入要修改的员工工号：");String id = scanner.nextLine();boolean found = false;for (Employee emp : employees) {if (emp.getId().equals(id)) {System.out.print("请输入新的员工姓名：");String newName = scanner.nextLine();System.out.print("请输入新的员工部门：");String newDept = scanner.nextLine();System.out.print("请输入新的员工工资：");double newSalary = scanner.nextDouble();scanner.nextLine(); // Consume newline left-overemp.setName(newName);emp.setDepartment(newDept);emp.setSalary(newSalary);System.out.println("✅ 员工信息修改成功！");found = true;break;}}if (!found) {System.out.println("❌ 未找到该员工！");}}// 查询员工信息private static void queryEmployee() {System.out.print("请输入要查询的员工工号：");String id = scanner.nextLine();boolean found = false;for (Employee emp : employees) {if (emp.getId().equals(id)) {System.out.println(emp);found = true;break;}}if (!found) {System.out.println("❌ 未找到该员工！");}}// 查看统计信息private static void showStatistics() {if (employees.isEmpty()) {System.out.println("⚠️ 当前没有员工信息！");return;}double totalSalary = 0;double maxSalary = Double.MIN_VALUE;double minSalary = Double.MAX_VALUE;for (Employee emp : employees) {double salary = emp.getSalary();totalSalary += salary;if (salary > maxSalary) {maxSalary = salary;}if (salary < minSalary) {minSalary = salary;}}double averageSalary = totalSalary / employees.size();System.out.println("📊 统计信息：");System.out.println("总员工人数：" + employees.size());System.out.println("平均工资：¥" + averageSalary);System.out.println("最高工资：¥" + maxSalary);System.out.println("最低工资：¥" + minSalary);}
}