Error creating bean with name 'userlogindao 'defined in class path resource [Application

Error:

Error creating bean with name 'userlogindao 'defined in class path resource [applicationcontext. XML]: instantiation of bean failed; Nested exception is Org. springframework. beans. beaninstantiationexception: cocould not instantiate Bean class [COM. my. dao. impl. userlogindaoimpl]:
Is it an abstract class ?; Nested exception is Java. Lang. instantiationexception

Because I use abstract, spring cannot be instantiated successfully.

Public abstract class userlogindaoimpl extends basedao implements iuserlogindao