static静态变量和transit修饰的成员变量不会被序列化

写入

public class STest {

    /**
     * @throws IOException
     * @throws FileNotFoundException
     * 
     */

    public static void main(String[] args) throws FileNotFoundException,
 IOException {
        Person p = new Person("aa", "23", "165");
        Person p1 = new Person("bb", "24", "168");
        Person p2 = new Person("cc", "25", "169");
        Person p3 = new Person("dd", "26", "190");
        ObjectOutputStream out = new ObjectOutputStream(
new FileOutputStream("d:/ht.txt"));
        out.writeObject(p3);
        out.writeObject(p2);
        out.writeObject(p1);
        out.writeObject(p);
        out.close();

    }
}

class Person implements Serializable {
    private String username;
    private String age;
    private String height;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getAge() {
        return age;
    }

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

    public String getHeight() {
        return height;
    }

    public void setHeight(String height) {
        this.height = height;
    }

    public Person(String username, String age, String height) {
        super();
        this.username = username;
        this.age = age;
        this.height = height;
    }

}

将三个对象保存到文件中，此时打开文件显示(字节流方式存储)的是

 �sr �com.mode.demo.mvnmode.Person?r脿+� �L �aget �Ljava/lang/String;L �heightq ~ �L �usernameq ~ �xpt �26t �190t �ddsq ~  t �25t �169t �ccsq ~  t �24t �168t �bbsq ~  t �23t �165t �aa

读取：

public static void main(String[] args) throws Exception {
        ObjectInputStream in = new ObjectInputStream(
                      new FileInputStream("d:/ht.txt"));
        Person p = (Person) in.readObject();
        Person p1 = (Person) in.readObject();
        Person p2 = (Person) in.readObject();
        Person p3 = (Person) in.readObject();
        System.out.println(p.getUsername());
        System.out.println(p1.getUsername());
        System.out.println(p2.getUsername());
        System.out.println(p3.getUsername());
        in.close();
    }

打印出的结果：

dd
cc
bb
aa