用Java编写人事管理系统代码要求 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。

以下是一个简单的Java人事管理系统代码，实现了上述三个要求：

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

public class HRSystem {
    private static ArrayList<Employee> employees = new ArrayList<>();

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请选择操作：");
            System.out.println("1.添加员工");
            System.out.println("2.查看所有员工信息");
            System.out.println("3.按工资+绩效排序并查看所有员工信息");
            System.out.println("4.退出程序");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    addEmployee(scanner);
                    break;
                case 2:
                    showAllEmployees();
                    break;
                case 3:
                    sortBySalaryAndPerformance();
                    showAllEmployees();
                    break;
                case 4:
                    System.out.println("程序已退出。");
                    System.exit(0);
                    break;
                default:
                    System.out.println("无效的操作。");
                    break;
            }
        }
    }

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

    private static void showAllEmployees() {
        if (employees.isEmpty()) {
            System.out.println("暂无员工信息。");
        } else {
            System.out.println("所有员工信息如下：");
            for (Employee employee : employees) {
                System.out.println(employee);
            }
        }
    }

    private static void sortBySalaryAndPerformance() {
        Collections.sort(employees, new Comparator<Employee>() {
            @Override
            public int compare(Employee e1, Employee e2) {
                double s1 = e1.getSalary() + e1.getPerformance();
                double s2 = e2.getSalary() + e2.getPerformance();
                return Double.compare(s2, s1);
            }
        });
    }

    private static void saveToFile(Employee employee) {
        try {
            FileWriter writer = new FileWriter("employees.txt", true);
            writer.write(employee.toString());
            writer.write(System.getProperty("line.separator"));
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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", id, name, age, salary, performance);
    }
}

该程序使用了ArrayList来存储员工信息，每当添加一个员工时，会将其信息保存到本地文本文档中（文件名为"employees.txt"）。可以通过选择操作来查看所有员工的信息，或按工资+绩效排序后查看所有员工的信息。