@Component("rbacService")
public class RbacServiceImpl implements RbacService {

	private AntPathMatcher antPathMatcher = new AntPathMatcher();

	@Override
	public boolean hasPermission(HttpServletRequest request, Authentication authentication) {
		Object principal = authentication.getPrincipal();

		boolean hasPermission = false;

		if (principal instanceof Admin) {
			//如果使用者名稱是admin，就永遠返回true
			if (StringUtils.equals(((Admin) principal).getUsername(), "admin")) {
				hasPermission = true;
			} else {
				// 讀取使用者所擁有許可權的所有URL
				Set<String> urls = ((Admin) principal).getUrls();
				for (String url : urls) {
					if (antPathMatcher.match(url, request.getRequestURI())) {
						hasPermission = true;
						break;
					}
				}
			}
		}

		return hasPermission;
	}

}
 

@Component
@Order(Integer.MAX_VALUE)    //最後載入
public class RbacAuthorizeConfigProvider implements AuthorizeConfigProvider {
	@Override
	public boolean config(ExpressionUrlAuthorizationConfigurer<HttpSecurity>.ExpressionInterceptUrlRegistry config) {
		config
			.antMatchers(HttpMethod.GET, "/fonts/**").permitAll()
			.antMatchers(HttpMethod.GET, 
					"/**/*.html",
					"/admin/me",
					"/resource").authenticated()
			.anyRequest()
				.access("@rbacService.hasPermission(request, authentication)");
		return true;
	}

}