Java对象的序列化（Object Serialization）

先定义两个简单的类：

package comm;

import java.io.Serializable;
import java.util.Date;
import java.util.GregorianCalendar;

public class Employee implements Serializable{
    
    private static final long serialVersionUID = 8820461656542319555L;
    private String name;
    private double salay;
    private Date hireDay;
    
    public Employee(String name, double salay, int year, int month, int day) {
        super();
        this.name = name;
        this.salay = salay;
        GregorianCalendar calender = new GregorianCalendar(year, (month - 1), day);
        this.hireDay = calender.getTime();
    }
    
    public void raseSalay(double rSalay){
        this.salay += rSalay;
    }
    
    @Override
    public String toString() {
        return "Employee [name=" + name + ", salay=" + salay + ", hireDay="
                + hireDay + "]";
    }

    public String getName() {
        return name;
    }

    public double getSalay() {
        return salay;
    }

    public Date getHireDay() {
        return hireDay;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setSalay(double salay) {
        this.salay = salay;
    }

    public void setHireDay(Date hireDay) {
        this.hireDay = hireDay;
    }

}

public class Employee Class