我从我的angularjs客户端应用程序点击一个端点登录时，我正在做一个我在浏览器控制台中得到以下错误
选项http://localhost:8080/oauth/token XMLHttpRequest无法加载http://localhost:8080/oauth/token。HTTP状态代码401无效
它是服务器端代码，用于接受来自客户端的CORS。

@Component
public class SimpleCORSFilter implements Filter {
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
		HttpServletResponse response = (HttpServletResponse) res;
		response.setHeader("Access-Control-Allow-Origin", "*");
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "3600");
		response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
		chain.doFilter(req, res);
	}
	public void init(FilterConfig filterConfig) {}
	public void destroy() {}
}

这是客户端代码，调用http://localhost:8080/oauth/token

angular.module('frontendApp')
  .factory('AuthServerProvider', function loginService($http, localStorageService, Base64, API_SERVER) {
    return {
      login: function (credentials) {
        var data = "username=" + credentials.username + "&password="
          + credentials.password + "&grant_type=password&scope=read%20write&" +
          "client_secret=123456&client_id=clientapp";
        return $http.post(API_SERVER + 'oauth/token', data, {
          headers: {
            "Content-Type": "application/x-www-form-urlencoded",
            "Accept": "application/json",
            "Access-Control-Allow-Origin": "*",
            "Authorization": "Basic " + Base64.encode("clientapp" + ':' + "123456")
          }
        }).success(function (response) {
          var expiredAt = new Date();
          expiredAt.setSeconds(expiredAt.getSeconds() + response.expires_in);
          response.expires_at = expiredAt.getTime();
          localStorageService.set('token', response);
          return response;
        });
      },
      logout: function () {
        // logout from the server
        $http.post('api/logout').then(function () {
          localStorageService.clearAll();
        });
      },
      getToken: function () {
        return localStorageService.get('token');
      },
      hasValidToken: function () {
        var token = this.getToken();
        return token && token.expires_at && token.expires_at > new Date().getTime();
      }
    };
  });