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This article mainly introduces how to solve the problem of SpringSecurity custom AuthenticationProvider can not @ Autowire, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Custom AuthenticationProvider can not be solved by @ Autowire

Always report Null problems when using @ Autowired injection in AuthenticationProvider

After searching for a long time, I found that @ EnableWebSecuritypublic class SecurityConfig extends WebSecurityConfigurerAdapter {when setting AuthenticationProvider in the SecurityConfig configuration class

Should be set in the way @ Bean

@ Bean CustomAuthenticationProvider customAuthenticationProvider () {return new CustomAuthenticationProvider ();} @ Override protected void configure (AuthenticationManagerBuilder auth) throws Exception {auth.authenticationProvider (customAuthenticationProvider ());} the wrong setting method before is @ Override protected void configure (AuthenticationManagerBuilder auth) throws Exception {auth.authenticationProvider (new CustomAuthenticationProvider ());}

Well, this makes it possible to use @ Autowired freely in AuthenticationProvider.

A simple example of custom AuthenticationProvider xml configuration net.mantis.security.auth.MyAuthenticationProviderpublic class MyAuthenticationProvider implements AuthenticationProvider {UserDetailsService userDetailsService; public Authentication authenticate (Authentication authentication) throws AuthenticationException {/ / username System.out.println ("username:" + authentication.getName ()) / / password System.out.println ("password:" + authentication.getCredentials ()); System.out.println ("getPrincipal:" + authentication.getPrincipal ()); System.out.println ("getAuthorities:" + authentication.getAuthorities ()); System.out.println ("getDetails:" + authentication.getDetails ()); UserDetails userDetails = (UserDetails) this.userDetailsService.loadUserByUsername (authentication.getName ()) UsernamePasswordAuthenticationToken result = new UsernamePasswordAuthenticationToken (userDetails, authentication.getCredentials (), userDetails.getAuthorities ()); return result;} public boolean supports (Class authentication) {return true;} public void setUserDetailsService (UserDetailsService userDetailsService) {this.userDetailsService = userDetailsService }} net.mantis.security.auth.NMUserDetailsServicepublic class NMUserDetailsService implements UserDetailsService {@ Override public UserDetails loadUserByUsername (String userName) throws UsernameNotFoundException {ArrayList list = new ArrayList (); list.add (new SimpleGrantedAuthority ("ROLE_SUPERVISOR")); User details = new User ("rod", "koala", list); return details }} Thank you for reading this article carefully. I hope the article "how to solve the problem of SpringSecurity custom AuthenticationProvider can not @ Autowire" shared by the editor will be helpful to you. At the same time, I also hope you will support us and follow the industry information channel. More related knowledge is waiting for you to learn!

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