IDEA自动生成序列化ID

File -> Settings -> Editor -> Inspections -> 搜索 Serialization issues ，找到 Serializable class without 'serialVersionUID' ->打上勾，Apply->OK

 实现方式  创建实体类
 

public class TestEntity  implements Serializable {

}

通过快捷键 Alt +Enter 

得出的效果

public class TestEntity  implements Serializable {

    private static final long serialVersionUID = -379118538868139918L;
}