Java 在spring安全标签中启用CORS

如何在Spring安全标签（即令牌url）中启用CORS。我使用的是SpringSecurity3.1和SpringMVC4.3.12。我已成功生成令牌以保护API，但无法在令牌url中启用

CORS

。 我使用了以下代码来生成访问令牌

spring security.xml

<http pattern="/oauth/token" create-session="stateless"  
          authentication-manager-ref="clientAuthenticationManager"  
          xmlns="http://www.springframework.org/schema/security">  
        <intercept-url pattern="/oauth/token" access="IS_AUTHENTICATED_FULLY" />  
        <anonymous enabled="false" />  
        <http-basic entry-point-ref="clientAuthenticationEntryPoint" />  
        <!-- include this only if you need to authenticate clients via request   
        parameters -->  
        <custom-filter ref="clientCredentialsTokenEndpointFilter"  
                       after="BASIC_AUTH_FILTER" />  
        <access-denied-handler ref="oauthAccessDeniedHandler" />  
    </http>  

<mvc:cors>
        <mvc:mapping path="/oauth/token" allowed-origins="http://localhost:4200"
                     allowed-methods="GET" allowed-headers="Access-Control-Allow-Origin" />
    </mvc:cors>

:
请求的服务器上不存在“Access Control Allow Origin”标头
资源。因此，不允许使用源“”
通道响应的HTTP状态代码为400

对于此错误，您必须创建如下所示的新类<代码>专用字符串corsFilter=“*”当您提供*时，它将允许一切。希望它能帮助你

@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class CorsFilter implements Filter {

    private String corsFilter="*";

    public CorsFilter() {
    }

    @Override
    public void doFilter(final ServletRequest req, final ServletResponse res,
            final FilterChain chain) throws IOException, ServletException {

        final HttpServletResponse response = (HttpServletResponse) res;
        final HttpServletRequest request = (HttpServletRequest) req;
        response.setHeader("Access-Control-Allow-Origin", corsFilter);
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods",
                "POST,  GET, PUT, OPTIONS, PATCH ,DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", " Content-Type, Authorization");

        if ("OPTIONS".equalsIgnoreCase(request.getMethod())) {
            response.setStatus(HttpServletResponse.SC_OK);
        } else {
            chain.doFilter(req, res);
        }
    }

    @Override
    public void init(final FilterConfig filterConfig) {
    }

    @Override
    public void destroy() {
    }
}

我需要为
Filter
classimport javax.servlet.Filter；导入哪个类；。如果我的回答是有帮助的，请接受我的回答，我不能使用XML@jai吗