flex.messaging无法解析自己创建的Amf3格式消息，如何解决？(语言-java)

Question

在实验创建Amf3格式消息时，能够正常serialize消息，却不能deserialize消息。想求问原因

public class Demo {

public static void main(String[] args) throws IOException, ClassNotFoundException {
    Student st=new Student();
    byte[] _bs =Amf3_3.serialize(st);
    Student st2= (Student) Amf3_3.deserialize(_bs);
}

public class Amf3_3 {
  public static byte[] serialize(Object data) throws IOException {
    MessageBody body = new MessageBody();
    body.setData(data);

    ActionMessage message = new ActionMessage();
    message.addBody(body);

    ByteArrayOutputStream out = new ByteArrayOutputStream();

    AmfMessageSerializer serializer = new AmfMessageSerializer();
    serializer.initialize(SerializationContext.getSerializationContext(), out, null);
    serializer.writeMessage(message);

    return out.toByteArray();
  }

  public static Object deserialize(byte[] amf) throws ClassNotFoundException, IOException {
    ByteArrayInputStream in = new ByteArrayInputStream(amf);
    AmfMessageDeserializer deserializer = new AmfMessageDeserializer();
    deserializer.initialize(SerializationContext.getSerializationContext(), in, null);
    ActionMessage message=new ActionMessage();
    deserializer.readMessage(message, new ActionContext());
    return  message.getBody(0);
  }
 }

public class Student implements Serializable{
  private static final long serialVersionUID = 1L;
  public String account;
  public String tClass;

  public Student() {
    this.account = "111";
    this.tClass = "222";
  }

  @Override
  public String toString() {
    return "Student{" +
            "account='" + account + '\'' +
            ", tClass='" + tClass + '\'' +
            '}';
   }
 }

运行结果及报错内容

Exception in thread "main" flex.messaging.io.SerializationException: Creation validation for class 'Student' failed.
at flex.messaging.util.ClassUtil.validateCreation(ClassUtil.java:354)
at flex.messaging.util.ClassUtil.createDefaultInstance(ClassUtil.java:115)
at flex.messaging.io.AbstractProxy.createInstanceFromClassName(AbstractProxy.java:95)
at flex.messaging.io.AbstractProxy.createInstance(AbstractProxy.java:115)
at flex.messaging.io.amf.AbstractAmfInput.createObjectInstance(AbstractAmfInput.java:169)
at flex.messaging.io.amf.Amf3Input.readScriptObject(Amf3Input.java:748)
at flex.messaging.io.amf.Amf3Input.readObjectValue(Amf3Input.java:156)
at flex.messaging.io.amf.Amf3Input.readObject(Amf3Input.java:134)
at flex.messaging.io.amf.Amf0Input.readObjectValue(Amf0Input.java:124)
at flex.messaging.io.amf.Amf0Input.readObject(Amf0Input.java:95)
at flex.messaging.io.amf.AmfMessageDeserializer.readObject(AmfMessageDeserializer.java:199)
at flex.messaging.io.amf.AmfMessageDeserializer.readBody(AmfMessageDeserializer.java:173)
at flex.messaging.io.amf.AmfMessageDeserializer.readMessage(AmfMessageDeserializer.java:93)
at Amf3_3.deserialize(Amf3_3.java:28)
at Demo.main(Demo.java:28)
断开与目标 VM 的连接，地址：'127.0.0.1:1113', transport: 'socket'

进程已结束，退出代码 1

我的解答思路和尝试过的方法

我想要达到的结果

Answer 1

import java.io.IOException;

public class Demo {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        //创建
        Student st = Student.builder().account("aa").tClass("bb").build();
        //序列化
        byte[] _bs = Amf3_3.serialize(st);
        //反序列化
        System.out.println(Amf3_3.deserialize(_bs));
    }
}

import flex.messaging.io.SerializationContext;
import flex.messaging.io.amf.*;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class Amf3_3 {
    public static byte[] serialize(Object data) throws IOException {
        MessageBody body = new MessageBody();
        body.setData(data);
        ActionMessage message = new ActionMessage();
        message.addBody(body);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        AmfMessageSerializer serializer = new AmfMessageSerializer();
        serializer.initialize(SerializationContext.getSerializationContext(), out, null);
        serializer.writeMessage(message);
        return out.toByteArray();
    }

    public static Object deserialize(byte[] amf) throws ClassNotFoundException, IOException {
        ByteArrayInputStream in = new ByteArrayInputStream(amf);
        AmfMessageDeserializer deserializer = new AmfMessageDeserializer();
        deserializer.initialize(SerializationContext.getSerializationContext(), in, null);
        ActionMessage message = new ActionMessage();
        deserializer.readMessage(message,new ActionContext());
        MessageBody body = message.getBody(0);
        return body.getData();
    }
}

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.NoArgsConstructor;

import java.io.Serializable;

@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Student implements Serializable {

    private static final long serialVersionUID = -6511660272442746949L;
    public String account;
    public String tClass;
}