SpringSecurity implementation kicks out a specified user example

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    ISysUserService userService;
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        ()
                .antMatchers("/webjars/**","/asserts/**","/login").permitAll()
                 .anyRequest().authenticated()
                 .and()
                 .formLogin()
                 .loginPage("/login")
                 .loginProcessingUrl("/loginPost")
                 .failureUrl("/login?error=true")
                 .defaultSuccessUrl("/index")
                 .and()
                 .logout()
                 .logoutUrl("/logout")
                 .addLogoutHandler(new MyLogoutHandler())
                 .logoutSuccessUrl("/login")
                 .and()
                 .rememberMe()
                 .userDetailsService(userService)
                 .tokenRepository(jdbcTokenRepository())
                 //Save the login status time, unit is seconds
                 .tokenValiditySeconds(60*60*3)
                 .and()
                 //Close the frame option in the request header without restricting the iframe
                 .headers().frameOptions().disable()
                 //Close cross-domain
                 .and().csrf().disable()
                 .sessionManagement()
                 //Invalid session jump
                 .invalidSessionUrl("/login")
                 //Login multiple at the same time and only one is retained
                 .maximumSessions(1)
                 //Expired session jump
                 .expiredUrl("/login")
                 .sessionRegistry(sessionRegistry());
     }
     /** Register SessionRegistry*/
    @Bean
    public SessionRegistry sessionRegistry(){
        return new SessionRegistryImpl();
   	}

/** Kick out user */
    @PreAuthorize("hasRole('administrator')")
    @GetMapping("/logout/{id}")
    @ResponseBody
    public String logout(@PathVariable Long id) throws NoSuchFieldException {
    	//Query user through id        SysUser sysUser = (id);
        //Get all principal information        List<Object> allPrincipals = ();
        for (Object allPrincipal : allPrincipals) {
            User user=(User)allPrincipal;
            //Judge whether it is consistent with the user login name found by the passed id            if(().equals(())){
                List<SessionInformation> allSessions = (allPrincipal, false);
                for (SessionInformation session : allSessions) {
                	//Make the current session expire                    ();
                }
            }
        }
        return "ok";
    }