Spring Boot 2多页面应用中，如何使用JWT实现安全认证？

public class JWTTokenFilter extends BasicAuthenticationFilter {

    // ... 省略部分代码 ...

    @Override
    protected void doFilterInternal(@NotNull HttpServletRequest request, @NotNull HttpServletResponse response, @NotNull FilterChain filterChain) throws ServletException, IOException {
        String token = getToken(request);
        //noinspection ConstantConditions
        if (token != null && !isLogin()) { //优化条件判断
            try {
                String username = JwtUtils.getUsername(token);
                userService.loadUserByUsername(username).ifPresent(userDetails -> {
                    UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(userDetails, token, userDetails.getAuthorities());
                    authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
                    SecurityContextHolder.getContext().setAuthentication(authenticationToken);
                    log.debug("用户{}校验成功!", username);
                });
            } catch (Exception e) {
                log.debug(e.getMessage(), e);
            }
        }
        filterChain.doFilter(request, response);
    }

    // ... 省略部分代码 ...

}