首页 > 代码库 > Transient关键字的作用

Transient关键字的作用

2024-07-13 23:53:13   222人阅读

在对象序列化的时候，有些变量不需要序列化，比如密码等，可以使用transient关键字来解决这个问题，transient修饰的变量不会被序列化。

例子：

 1 import java.io.*; 2 import java.util.Date; 3  
 4  5 /** 6  * Created by leiqiang on 2014/7/25. 7  */ 8 public class TransientTest implements Serializable{ 9     private Date date = new Date();10     private String username;11     private transient String password;12 13     public TransientTest(String username,String password){14         this.username=username;15         this.password=password;16     }17 18     @Override19     public String toString() {20         return new Date()+" username "+username+" : password "+password;21     }22 23     public static void main(String[] args) throws Exception{24         TransientTest transientTest = new TransientTest("lei","1234");25         System.out.println(transientTest);26         FileOutputStream fileOutputStream = new FileOutputStream("d:/Cache/TransientTest.txt");27         ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream);28         objectOutputStream.writeObject(transientTest);29         objectOutputStream.close();30         Thread.sleep(2000);31         FileInputStream fileInputStream = new FileInputStream("d:/Cache/TransientTest.txt");32         ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);33         transientTest = (TransientTest)objectInputStream.readObject();34         System.out.println(transientTest);35     }36 }

运行结果：

1 Fri Jul 25 13:56:13 CST 2014 username lei : password 12342 Fri Jul 25 13:56:15 CST 2014 username lei : password null


联系
我们