定义Staff类(职工)，包含 dateHired， dateHired为雇佣日期(java.util.Date类型

)，以及firstName，lastName，address，email，phone等属性，并提供对应的getters和setters方法。

import java.util.Date;

public class Staff {
    private Date dateHired;
    private String firstName;
    private String lastName;
    private String address;
    private String email;
    private String phone;

    public Date getDateHired() {
        return dateHired;
    }

    public void setDateHired(Date dateHired) {
        this.dateHired = dateHired;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }
}