Java员工请假管理实现详解

// 员工类
class Employee {
    private String id;
    private String name;
    private String role; // 如 "普通员工"、"经理"

    public Employee(String id, String name, String role) {
        this.id = id;
        this.name = name;
        this.role = role;
    }

    // getter 方法
    public String getId() { return id; }
    public String getName() { return name; }
    public String getRole() { return role; }
}

// 请假单类
class LeaveRequest {
    private String requestId;
    private String employeeId;
    private String reason;
    private int days;
    private String status; // "待审批"、"已批准"、"已拒绝"

    public LeaveRequest(String requestId, String employeeId, String reason, int days) {
        this.requestId = requestId;
        this.employeeId = employeeId;
        this.reason = reason;
        this.days = days;
        this.status = "待审批";
    }

    // getter 和 setter
    public String getRequestId() { return requestId; }
    public String getEmployeeId() { return employeeId; }
    public String getReason() { return reason; }
    public int getDays() { return days; }
    public String getStatus() { return status; }
    public void setStatus(String status) { this.status = status; }
}

import java.util.HashMap;
import java.util.Map;

class LeaveService {
    private Map<string employee> employees = new HashMap();
    private Map<string leaverequest> requests = new HashMap();

    public LeaveService() {
        // 模拟初始化员工数据
        employees.put("E001", new Employee("E001", "张三", "普通员工"));
        employees.put("E002", new Employee("E002", "李四", "经理"));
    }

    // 提交请假
    public String submitLeave(String empId, String reason, int days) {
        if (!employees.containsKey(empId)) {
            return "员工不存在";
        }
        String reqId = "REQ" + (requests.size() + 1);
        LeaveRequest request = new LeaveRequest(reqId, empId, reason, days);
        requests.put(reqId, request);
        return "请假已提交，申请编号：" + reqId;
    }

    // 审批请假（经理操作）
    public String approveLeave(String requestId, boolean approved) {
        LeaveRequest request = requests.get(requestId);
        if (request == null) {
            return "未找到该请假申请";
        }
        if ("已批准".equals(request.getStatus()) || "已拒绝".equals(request.getStatus())) {
            return "该申请已处理，无法重复审批";
        }

        if (approved) {
            request.setStatus("已批准");
            return "已批准请假申请：" + requestId;
        } else {
            request.setStatus("已拒绝");
            return "已拒绝请假申请：" + requestId;
        }
    }

    // 查询请假状态
    public LeaveRequest getLeaveStatus(String requestId) {
        return requests.get(requestId);
    }
}
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public class LeaveManagementDemo {
    public static void main(String[] args) {
        LeaveService service = new LeaveService();

        // 员工提交请假
        String result = service.submitLeave("E001", "生病", 3);
        System.out.println(result); // 输出申请编号

        // 获取申请编号以便审批
        LeaveRequest request = service.getLeaveStatus("REQ1");
        if (request != null) {
            System.out.println("当前状态: " + request.getStatus());

            // 经理审批（模拟）
            String approvalResult = service.approveLeave("REQ1", true);
            System.out.println(approvalResult);

            // 再次查看状态
            System.out.println("最新状态: " + service.getLeaveStatus("REQ1").getStatus());
        }
    }
}