[Java知识库]拦截器配置，获取请求头中的用户id，放置到ThreadLocal线程空间中

@Component
public class AppTokenInterceptor extends HandlerInterceptorAdapter {

    /**
     * 前置拦截 -  获取请求头中的  userId , 放入到当前线程中
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1. 获取请求头
        String userId = request.getHeader("userId");
        if (StringUtils.isNotBlank(userId) && !StringUtils.equals("0",userId)) {
            //2. 存入线程
            ApUser apUser = new ApUser();
            apUser.setId(Long.valueOf(userId));

            AppThreadLocalUtil.setUser(apUser);
        }

        return super.preHandle(request, response, handler);
    }

    /**
     * 清楚线程中的用户数据
     *
     * @param request
     * @param response
     * @param handler
     * @param modelAndView
     * @throws Exception
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        //清楚线程数据
        AppThreadLocalUtil.clear();
        super.postHandle(request, response, handler, modelAndView);
    }
}

注入拦截器对象

ackage com.ligong.search.config;

import com.ligong.search.interceptor.AppTokenInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class WmMvcConfig implements WebMvcConfigurer {

    @Autowired
    private AppTokenInterceptor appTokenInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(appTokenInterceptor).addPathPatterns("/api/**");
    }
}

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