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UserDetailsService

{security-api-url}org/springframework/security/core/userdetails/UserDetailsService.html[UserDetailsService] is used by DaoAuthenticationProvider for retrieving a username, password, and other attributes for authenticating with a username and password. Spring Security provides in-memory and JDBC implementations of UserDetailsService.

You can define custom authentication by exposing a custom UserDetailsService as a bean. For example, the following will customize authentication assuming that CustomUserDetailsService implements UserDetailsService:

This is only used if the AuthenticationManagerBuilder has not been populated and no AuthenticationProviderBean is defined.

Example 1. Custom UserDetailsService Bean

Java

@Bean
CustomUserDetailsService customUserDetailsService() {
	return new CustomUserDetailsService();
}

XML

<b:bean class="example.CustomUserDetailsService"/>

Kotlin

@Bean
fun customUserDetailsService() = CustomUserDetailsService()