java之transient

来源：互联网发布：数据分析工具有哪些编辑：程序博客网时间：2024/04/30 20:39

transient关键字，表明一个属性是临时的，如果Class类实现了 Serializable接口，被transient修饰的属性不会被持久化！！！

代码验证：

public class TransientDemo implements Serializable {    private static final long serialVersionUID = 1415782474432670389L;    private String name;    private transient String sex;    public TransientDemo() {    }    public static long getSerialVersionUID() {        return serialVersionUID;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;    }    @Override    public String toString() {        return "TransientDemo{" +                "name='" + name + '\'' +                ", sex='" + sex + '\'' +                '}';    }    public static void main(String[] args) throws IOException {        String path = "D:"+ File.separator+"transientDemo.txt";        File file = new File(path);        TransientDemo transientDemo = new TransientDemo();        transientDemo.setName("张三");        transientDemo.setSex("保密：女");        System.out.println("before: " + transientDemo);        ObjectOutputStream output = null;        try {            output = new ObjectOutputStream(new FileOutputStream(file));            output.writeObject(transientDemo);        } catch (IOException e) {            e.printStackTrace();        }finally {            output.flush();            output.close();        }        ObjectInput input = null;        try {            input = new ObjectInputStream(new FileInputStream(file));            TransientDemo demo = (TransientDemo) input.readObject();            System.out.println("after:  " + demo );        } catch (IOException e) {            e.printStackTrace();        }catch (ClassNotFoundException ex){            ex.printStackTrace();        }finally {            input.close();        }        /*  output----------------------------        before: TransientDemo{name='张三', sex='保密：女'}        after:  TransientDemo{name='张三', sex='null'}        */    }}

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