Java写人事管理系统 要求 1、在用户界面中输入一个员工的工号，姓名，年龄，工资，绩效，保存在一个本地文本文档中。 2、可以对一个或所有员工的工号，年龄，工资，绩效显示在界面上。 3、可以对所有员工的（工资+绩效）的总数进行排序显示在界面上代码·

好的，我会尽力回答您的问题。这是一个Java编写人事管理系统的示例代码，包括输入员工信息、保存信息、显示信息和排序的功能：

import java.io.*;
import java.util.*;

public class PersonnelManagementSystem {
    private static final String FILENAME = "employees.txt";
    private static List<Employee> employees = new ArrayList<>();

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        boolean exit = false;
        while (!exit) {
            System.out.println("请选择要执行的操作：");
            System.out.println("1. 输入员工信息");
            System.out.println("2. 保存员工信息");
            System.out.println("3. 显示员工信息");
            System.out.println("4. 按工资和绩效排序");
            System.out.println("5. 退出程序");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    inputEmployeeInfo(scanner);
                    break;
                case 2:
                    saveEmployeeInfo();
                    break;
                case 3:
                    displayEmployeeInfo();
                    break;
                case 4:
                    sortEmployeeInfo();
                    break;
                case 5:
                    exit = true;
                    break;
                default:
                    System.out.println("无效的操作，请重新选择。");
                    break;
            }
        }
    }

    private static void inputEmployeeInfo(Scanner scanner) {
        System.out.println("请输入员工信息：");
        System.out.print("工号：");
        int id = scanner.nextInt();
        System.out.print("姓名：");
        String name = scanner.next();
        System.out.print("年龄：");
        int age = scanner.nextInt();
        System.out.print("工资：");
        double salary = scanner.nextDouble();
        System.out.print("绩效：");
        double performance = scanner.nextDouble();
        Employee employee = new Employee(id, name, age, salary, performance);
        employees.add(employee);
    }

    private static void saveEmployeeInfo() {
        try (PrintWriter writer = new PrintWriter(new FileWriter(FILENAME))) {
            for (Employee employee : employees) {
                writer.printf("%d,%s,%d,%.2f,%.2f%n", employee.getId(), employee.getName(), employee.getAge(), employee.getSalary(), employee.getPerformance());
            }
            System.out.println("员工信息已保存。");
        } catch (IOException e) {
            System.out.println("保存员工信息失败：" + e);
        }
    }

    private static void displayEmployeeInfo() {
        System.out.println("请输入要显示的信息类型：");
        System.out.println("1. 显示全部员工信息");
        System.out.println("2. 显示指定员工信息");
        Scanner scanner = new Scanner(System.in);
        int choice = scanner.nextInt();
        switch (choice) {
            case 1:
                for (Employee employee : employees) {
                    System.out.println(employee);
                }
                break;
            case 2:
                System.out.print("请输入要显示的员工工号：");
                int id = scanner.nextInt();
                boolean found = false;
                for (Employee employee : employees) {
                    if (employee.getId() == id) {
                        System.out.println(employee);
                        found = true;
                        break;
                    }
                }
                if (!found) {
                    System.out.println("未找到指定的员工。");
                }
                break;
            default:
                System.out.println("无效的操作，请重新选择。");
                break;
        }
    }

    private static void sortEmployeeInfo() {
        Collections.sort(employees, new Comparator<Employee>() {
            @Override
            public int compare(Employee o1, Employee o2) {
                double totalSalary1 = o1.getSalary() + o1.getPerformance();
                double totalSalary2 = o2.getSalary() + o2.getPerformance();
                return Double.compare(totalSalary2, totalSalary1);
            }
        });
        System.out.println("员工信息已按工资和绩效排序：");
        for (Employee employee : employees) {
            System.out.println(employee);
        }
    }

    private static class Employee {
        private int id;
        private String name;
        private int age;
        private double salary;
        private double performance;

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

        public int getId() {
            return id;
        }

        public String getName() {
            return name;
        }

        public int getAge() {
            return age;
        }

        public double getSalary() {
            return salary;
        }

        public double getPerformance() {
            return performance;
        }

        @Override
        public String toString() {
            return String.format("工号：%d，姓名：%s，年龄：%d，工资：%.2f，绩效：%.2f，总工资：%.2f", id, name, age, salary, performance, salary + performance);
        }
    }
}

此代码实现了您所需求的基本功能，但还有许多改进的空间。例如，可以使用数据库来保存员工信息，添加删除员工信息的功能等等。