Java -----transient 和static

越来越喜欢深究java基础了，讲讲 transient  和static 对序列化的影响。废话少说，直接上代码就可以了

package serializable;

import java.io.Serializable;

public class User implements Serializable {
    private String name;
    private transient String password; // 被transient修饰的变量
    private static String age;

    
    public User() {
        super();
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public static String getAge() {
        return age;
    }

    public static void setAge(String age) {
        User.age = age;
    }

}

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class Test {
    public static void main(String[] args) throws Exception {
        // User user = new User();
        // user.setAge("22");
        // user.setName("小明");
        // user.setPassword("admin");
        // System.out.println(user.getAge()+"	"+user.getName()+"	"+user.getPassword());
        // ObjectOutputStream oos = new ObjectOutputStream(new
        // FileOutputStream("e:/user.txt"));
        // oos.writeObject(user);
        // oos.flush();
        // oos.close();
        //
        // ObjectInputStream ois = new ObjectInputStream(new
        // FileInputStream("e:/user.txt"));
        // User users = (User) ois.readObject();
        //
        // System.out.println(users.getAge()+"	"+users.getName()+"	"+users.getPassword());
        // User user = new User();
        // user.setAge("22");
        // user.setName("小明");
        // user.setPassword("admin");
        // System.out.println(user.getAge()+"	"+user.getName()+"	"+user.getPassword());
        // ObjectOutputStream oos = new ObjectOutputStream(new
        // FileOutputStream("e:/user.txt"));
        //
        // oos.writeObject(user);
        // oos.flush();
        // oos.close();
    
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("e:/user.txt"));
        User users = (User) ois.readObject();

        System.out.println(users.getAge() + "	" + users.getName() + "	" + users.getPassword());

    }
}

运行截图贴上

第二次的代码运行截图，一目了然，

从运行结果可以看出用  transient 修饰的变量在反序列化后值为 null

 被static修饰的变量应该也是不会被序列化的，因为只有堆内存会被序列化.所以静态变量会天生不会被序列化。也是null.