java中transient关键字的作用解析

/**
 * @author: jiangjs
 * @description:
 * @date: 2023/3/2 9:56
 **/
@Data
@Accessors(chain = true)
public class UserInfo implements Serializable {
    private String userName;
    private transient String passWord;
    private transient Integer age;
}

/**
 * @author: jiangjs
 * @description: Transient使用
 * @date: 2023/3/2 9:46
 **/
public class Transient {
 
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        UserInfo userInfo = new UserInfo();
        userInfo.setUserName("张三").setPassWord("123456").setAge(20);
        System.out.println("获取实体数据：" + userInfo);
        writeDataToTxt(userInfo);
        UserInfo toTxt = readDataToTxt();
        System.out.println("序列化后获取数据：" + toTxt);
    }
 
    static void writeDataToTxt(UserInfo userInfo) throws IOException {
        ObjectOutputStream stream = new ObjectOutputStream(new FileOutputStream("D:\\eaafile\\text.txt"));
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("D:\\eaafile\\text2.txt"));
        stream.writeObject(userInfo);
        oos.write(("姓名:"+userInfo.getUserName()+"  password:"+userInfo.getPassWord()+"  age:"+userInfo.getAge()).getBytes("UTF-8"));
        stream.flush();
        oos.flush();
        stream.close();
        oos.close();
    }
 
    static UserInfo readDataToTxt() throws IOException, ClassNotFoundException {
        ObjectInputStream stream = new ObjectInputStream(new FileInputStream("D:\\eaafile\\text.txt"));
        UserInfo userInfo = (UserInfo)stream.readObject();
        stream.close();
        return userInfo;
    }
}