transient关键字
java的transient关键字为我们提供了便利,你只需要实现Serilizable接口,将不需要序列化的属性前添加关键字transient,序列化对象的时候,这个属性就不会序列化到指定的目的地中。
package test; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; public class Test { public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException { A a = new A(25, "张三"); System.out.println(a); ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("c://mm.txt")); oos.writeObject(a); oos.close(); ObjectInputStream ois = new ObjectInputStream(new FileInputStream("c://mm.txt")); a = (A) ois.readObject(); System.out.println(a); } } class A implements Serializable { int a; transient String b; //transient 使b属性没有进行序列化 public A(int a, String b) { this.a = a; this.b = b; } public String toString() { return "a = " + a + ",b = " + b; } }
运行结果:
a = 25,b = 张三 a = 25,b = null