MyClass NotSerializableException

Question

我创建了一个名为Components. 它有一些组件，如Button, TextArea,VerticalLayout等。我没有使这个类可序列化，因为我不需要，但是当我启动服务器时（我使用 Tomcat），我得到这个错误：java.io.NotSerializableException: com.vaadin13.Components    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)    at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1378)    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)    at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1378)    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)...当我的类不可序列化时，为什么会出现此错误，我该如何解决？

Answer 1

要修复此错误，请实现 Serializable 接口并为其指定一个 id。

 Public class Foo implements Serializable {

     private static final long serialversionUID = 1L; // example

      //code then

 }