transient:该数据不需要序列化，数据透明(输出显示null),private transient String name;
//写出后读取，读取的数徐与写出保持一致
public class n {
public static void main(String[]args) throws IOException, ClassNotFoundException
{
写入字节数组
//写出 序列化
ByteArrayOutputStream os=new ByteArrayOutputStream();
ObjectOutputStream oos=new ObjectOutputStream(new BufferedOutputStream(os));
ha ff=new ha("hh",222);
oos.writeUTF("哈哈");
oos.writeChar('q');
oos.writeBoolean(false);
oos.writeObject(ff);
oos.flush();
byte[] datas=os.toByteArray();
oos.close();
//读取 反序列化
ObjectInputStream ois =new ObjectInputStream(new BufferedInputStream(new ByteArrayInputStream(datas)));
String s=ois.readUTF();
char ch=ois.readChar();
boolean flag=ois.readBoolean();
Object str=ois.readObject(); //Object需要强制转换
//还原(判断是哪个类，然后强制转换):
if (str instanceof String ) //是String类就直接转换成字符串
{
String s1=(String)str;
System.out.println(s1);
}
if(str instanceof Data)
{
Date d=(Date)str;
System.out.println(d);
}
if(str instanceof ha)
{
ha fr=(ha)str;
System.out.println(fr.getName()+fr.getSalary());
}
ois.close();
}
//javabean，用于封装数据
class ha implements java.io.Serializable {
private transient String name; //该数据不需要序列化，数据透明
private double salary;
public ha()
{
}
public ha(String name,double salary)
{
this.name=name;
this.salary=salary;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
}
