SpringBoot | Cloud需求：通过拦截器中的token拿到userId？

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在网关的过滤器中filter将拿到的token的用户id存入当前线程中

  //获取用户信息Object userId = claimsBody.get("id");//存储header中ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {httpHeaders.add("userId", userId + "");}).build();//重置请求exchange.mutate().request(serverHttpRequest);

在需要的模块中使用拦截器，进行获取当前线程的拦截header中的userId


@Slf4j
public class WmTokenInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse
response, Object handler) throws Exception {
//得到header中的信息
String userId = request.getHeader("userId");
Optional<String> optional = Optional.ofNullable(userId);
if(optional.isPresent()){
//把用户id存入threadloacl中
WmUser wmUser = new WmUser();
wmUser.setId(Integer.valueOf(userId));
WmThreadLocalUtils.setUser(wmUser);
log.info("wmTokenFilter设置用户信息到threadlocal中...");
}
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse
response, Object handler, ModelAndView modelAndView) throws Exception {
log.info("清理threadlocal...");
WmThreadLocalUtils.clear();
}
}

工具类

public class WmThreadLocalUtil {
private final static ThreadLocal<WmUser> WM_USER_THREAD_LOCAL = new
ThreadLocal<>();
/**
* 添加用户
* @param wmUser
*/
public static void setUser(WmUser wmUser){
WM_USER_THREAD_LOCAL.set(wmUser);
}
/**
* 获取用户
*/
public static WmUser getUser(){
return WM_USER_THREAD_LOCAL.get();
}
/**
* 清理用户
*/
public static void clear(){
WM_USER_THREAD_LOCAL.remove();
}
}

最后的最后，不要忘记开启拦截器配置


@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new
WmTokenInterceptor()).addPathPatterns("/**");
}
}