• 代碼示例Entity

public class UserHolder {

    private static ThreadLocal<String> threadLocal = new ThreadLocal<>();

    public static String getUserId() {
        return threadLocal.get();
    }

    public static void setUserId(String userId) {
        threadLocal.set(userId);
    }

    public static void removeUserId() {
        threadLocal.remove();
    }

}

• 代碼示例 攔截器

/**
 * 攔截器
 * 攔截進(jìn)入到購物車微服務(wù)的所有請求，把userId放入到UserHolder里
 */
public class UserInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String userId = request.getHeader("USER_ID");
        UserHolder.setUserId(userId);
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUserId();
    }
}

• 代碼示例 配置類

@Configuration
public class MvcConfig implements WebMvcConfigurer {

    /**
     * 添加攔截器的方法
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {

        registry.addInterceptor(new UserInterceptor()).addPathPatterns("/**");
    }
}

• 網(wǎng)關(guān)獲取Cookie，解析Token，獲取Payload，得到UserInfo對象。把UserInfo中的userId放入到頭信息中

ctx.addZuulRequestHeader("USER_ID",userInfo.getId().toString());//請求微服務(wù)的
//ctx.addZuulResponseHeader("USER_ID",userInfo.getId().toString());//響應(yīng)到瀏覽器