SpringSecurity custom user password verification

After my user password is entered in the foreground, it needs to be encrypted and compared with the user name association, so the implementation class of AuthenticationProvider is rewritten for processing;

@Component
public class MyAuthenticationProvider implements AuthenticationProvider {

    @Autowired
    private ISysUserService iSysUserService;
    @Autowired
    private PasswordEncorder passwordEncorder;

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        String username = authentication.getName();
        String presentedPassword = (String)authentication.getCredentials();
        UserDetails userDeatils = null;
        // Acquire user information based on user name 
        SysUser sysUser = this .iSysUserService.getUserByName (username);
         if (StringUtils.isEmpty (sysUser)) {
             throw  new BadCredentialsException ("Username does not exist" ); 
        } else { 
            userDeatils = new User ( username, sysUser.getPassword (), AuthorityUtils.commaSeparatedStringToAuthorityList ("USER" )); 
            // Custom encryption rules, user name, input password and salt value stored in the database are encrypted 
            String encodedPassword = PasswordUtil.encrypt (username, presentedPassword , sysUser.getSalt ());
             if(authentication.getCredentials () == null ) {
                 throw  new BadCredentialsException ("Login name or password error" ); 
            } else  if (! this .passwordEncorder.matches (encodedPassword, userDeatils.getPassword ())) {
                 throw  new BadCredentialsException (" Incorrect login or password " ); 
            } else { 
                UsernamePasswordAuthenticationToken result = new UsernamePasswordAuthenticationToken (userDeatils, authentication.getCredentials (), userDeatils.getAuthorities ()); 
                result.setDetails (authentication.getDetails ());
                return result;
            }
        }
    }

    @Override
    public boolean supports(Class<?> authentication) {
        return true;
    }
}

Then enable it in SecurityConfiguration

@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    auth.authenticationProvider(this.myAuthenticationProvider);
}