ThreadLocal相关

• 代码示例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();
    }

}

• 代码示例 拦截器

/**
 * 拦截器
 * 拦截进入到购物车微服务的所有请求，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();
    }
}

• 代码示例 配置类

@Configuration
public class MvcConfig implements WebMvcConfigurer {

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

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

• 网关获取Cookie，解析Token，获取Payload，得到UserInfo对象。把UserInfo中的userId放入到头信息中

ctx.addZuulRequestHeader("USER_ID",userInfo.getId().toString());//请求微服务的
//ctx.addZuulResponseHeader("USER_ID",userInfo.getId().toString());//响应到浏览器