Error creating bean with name 'securityConfig' defined in file [E:\project\blog-auth\bin\main\com\oysp\spring\boot\blog\config\SecurityConfig.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'authenticationProvider' defined in class path resource [com/oysp/spring/boot/blog/config/SecurityConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.security.authentication.AuthenticationProvider]: Circular reference involving containing bean 'securityConfig' - consider declaring the factory method as static for independence from its containing instance. Factory method 'authenticationProvider' threw exception; nested exception is java.lang.IllegalArgumentException: passwordEncoder cannot be null

涉及到的代码我复制粘贴核对后还是报错