JWTAuthorizationFilter.java

public class JWTAuthorizationFilter extends BasicAuthenticationFilter {

    public JWTAuthorizationFilter(AuthenticationManager authManager) {
        super(authManager);
    }

    @Override
    protected void doFilterInternal(HttpServletRequest req,
                                    HttpServletResponse res,
                                    FilterChain chain) throws IOException, ServletException {
        String header = req.getHeader(HEADER_STRING);

        if (header == null || !header.startsWith(TOKEN_PREFIX)) {
            chain.doFilter(req, res);
            return;
        }

        UsernamePasswordAuthenticationToken authentication = getAuthentication(req);

        SecurityContextHolder.getContext().setAuthentication(authentication);
        chain.doFilter(req, res);
    }

    // Reads the JWT from the Authorization header, and then uses JWT to validate the token
    private UsernamePasswordAuthenticationToken getAuthentication(HttpServletRequest request) {
        String token = request.getHeader(HEADER_STRING);

        if (token != null) {
            // parse the token.
            String user = JWT.require(Algorithm.HMAC512(SECRET.getBytes()))
                    .build()
                    .verify(token.replace(TOKEN_PREFIX, ""))
                    .getSubject();

            if (user != null) {
                // new arraylist means authorities
                return new UsernamePasswordAuthenticationToken(user, null, new ArrayList<>());
            }

            return null;
        }

        return null;
    }

Missing closing bracket on last line

Missing closing bracket on last line

Yep, copy paste issues 👍

Where is the JWT imported from ?