一:序列化概述。
public class person implements Serializable{創建person類,實現Serializable纔可以實現序列化
private String name;
private int age;
public person(){
super();
}
@Override
public String toString() {
return “person [name=” + name + “, age=” + age + “]”;
}
String getName() {
return name;
}
void setName(String name) {
this.name = name;
}
int getAge() {
return age;
}
void setAge(int age) {
this.age = age;
}
}
public class xuliehua {
public static void main(String[] args) throws IOException, ClassNotFoundException {
write();
read();
}
private static void read() throws IOException, IOException, ClassNotFoundException {
ObjectInputStream ois=new ObjectInputStream(new FileInputStream(“b.txt”));
Object obj=ois.readObject();
ois.close();
System.out.println(obj);這裏默認調用的是toString方法!
}
private static void write() throws IOException {
ObjectOutputStream oos=new ObjectOutputStream(new FileOutputStream("b.txt"));
person p1=new person();
p1.setName("lisi");
String s1=p1.toString();
oos.writeObject(p1);
oos.close();
}
//write()方法執行後,在b.txt中是亂碼的,看不懂。必須實行反序列化(即read()方法)纔可以看懂b.txt中的內容!
}
二.其實上述person類下面出現了黃線。如果將person類的age改成long,會發生什麼。
如果再進行讀取程序會出錯!(序列化值和成員相關,改變成員就會就會改變序列化值!)
若改爲private trancient int age則age就不會被序列化。