user-details-service.adoc

UserDetailsService

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

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

Note	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()