Java 程序：解析员工文件，查找员工信息并计算周年纪念日

以下是一个使用 Java 编写的程序，它读取当前目录下的所有员工文件，解析出员工信息并存入 Map。然后，用户输入员工姓名，程序将查找员工信息并输出姓名、年龄、工资和入职 20 周年纪念日当周的周六日期。

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

class Emp {
    private String name;
    private int age;
    private int salary;
    private Date hireDate;

    public Emp(String name, int age, int salary, Date hireDate) {
        this.name = name;
        this.age = age;
        this.salary = salary;
        this.hireDate = hireDate;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public int getSalary() {
        return salary;
    }

    public Date getHireDate() {
        return hireDate;
    }
}

public class EmployeeProgram {
    private static Map<String, Emp> employeeMap = new HashMap<>();

    public static void main(String[] args) {
        readEmployeeFiles();
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入员工名字：");
        String name = scanner.nextLine();
        Emp employee = employeeMap.get(name);
        if (employee != null) {
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            String hireDateString = dateFormat.format(employee.getHireDate());
            System.out.println(employee.getName() + "," + employee.getAge() + "," + employee.getSalary() + "," + hireDateString);
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(employee.getHireDate());
            calendar.add(Calendar.YEAR, 20);
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);
            String anniversaryDate = dateFormat.format(calendar.getTime());
            System.out.println('入职20周年纪念日派对日期: ' + anniversaryDate);
        } else {
            System.out.println('查无此人');
        }
    }

    private static void readEmployeeFiles() {
        File currentDirectory = new File(".");
        File[] files = currentDirectory.listFiles();
        if (files != null) {
            for (File file : files) {
                if (file.isFile() && file.getName().endsWith(".txt")) {
                    parseEmployeeFile(file);
                }
            }
        }
    }

    private static void parseEmployeeFile(File file) {
        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
            String line;
            while ((line = reader.readLine()) != null) {
                String[] parts = line.split(",");
                if (parts.length == 4) {
                    String name = parts[0].trim();
                    int age = Integer.parseInt(parts[1].trim());
                    int salary = Integer.parseInt(parts[2].trim());
                    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
                    Date hireDate = dateFormat.parse(parts[3].trim());
                    Emp employee = new Emp(name, age, salary, hireDate);
                    employeeMap.put(name, employee);
                }
            }
        } catch (IOException | ParseException e) {
            e.printStackTrace();
        }
    }
}

请将此代码保存为EmployeeProgram.java文件并编译运行。程序会读取当前目录下的所有以.txt结尾的员工文件，并将员工信息解析为Emp对象存入employeeMap中。然后，程序会要求用户输入一个员工名字，若该员工存在，则输出该员工的名字、年龄、工资，以及入职20周年纪念日当周的周六的日期。若该员工不存在，则输出'查无此人'。