public void apply(final RequestTemplate requestTemplate) {
        Transmiter.getInstance().transmit((x$0, xva$1) -> {
            requestTemplate.header(x$0, new String[]{xva$1});
        }, HmilyTransactionContextLocal.getInstance().get());
    }

package com.jz.shop.cart.service;
import com.jz.shop.commons.utils.text.StringUtils;
import feign.InvocationHandlerFactory;
import feign.ReflectiveFeign;
import feign.RequestInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.dromara.hmily.annotation.Hmily;
import org.dromara.hmily.springcloud.feign.HmilyFeignInterceptor;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RestController;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.List;
import java.util.Map;
/**
 * @author:JZ
 * @date:2020/6/1
 */
@Slf4j
@Component
public class ShopFeignPostProcessor implements BeanPostProcessor {
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        return bean;
    }
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        // 對(duì)所有含有 @FeignClient 的bean進(jìn)行處理
        if (StringUtils.isNotNull(AnnotationUtils.findAnnotation(bean.getClass(), FeignClient.class))) {
            // 排除含有 @Controller 和 @RestController 注解的bean
            if (StringUtils.isNotNull(AnnotationUtils.findAnnotation(bean.getClass(), Controller.class)) ||
                    StringUtils.isNotNull(AnnotationUtils.findAnnotation(bean.getClass(), RestController.class))) {
                return bean;
            }
            try {
                // 獲取代理類中的 FeignInvocationHandler
                Field h = bean.getClass().getSuperclass().getDeclaredField("h");
                boolean hAccessible = h.isAccessible();
                h.setAccessible(true);
                Object feignInvocationHandler = h.get(bean);
                /**
                 * 獲取 FeignInvocationHandler 中 dispatch 字段的 Map<Method, MethodHandler> dispatch 屬性。
                 * dispatch中包含feign代理的方法 和 SynchronousMethodHandler
                 */
                Field dispatchField = feignInvocationHandler.getClass().getDeclaredField("dispatch");
                boolean dispatchAccessible = dispatchField.isAccessible();
                dispatchField.setAccessible(true);
                Map<Method, InvocationHandlerFactory.MethodHandler> dispatch =
                        (Map<Method, InvocationHandlerFactory.MethodHandler>) dispatchField.get(feignInvocationHandler);
                /**
                 * SynchronousMethodHandler 中的 List<RequestInterceptor> requestInterceptors 字段
                 * 加載了Hmily對(duì)feign的攔截器 HmilyFeignInterceptor
                 */
                for (Map.Entry<Method, InvocationHandlerFactory.MethodHandler> entry : dispatch.entrySet()) {
                    /**
                     * 沒(méi)有添加 @Hmily 注解的方法不需要被 Hmily 攔截處理，
                     * 否則會(huì)因?yàn)榧虞d的 HmilyTransactionContext 為 null 導(dǎo)致 NullPointerException
                     */
                    if (StringUtils.isNull(AnnotationUtils.findAnnotation(entry.getKey(), Hmily.class))) {
                        Field riField = entry.getValue().getClass().getDeclaredField("requestInterceptors");
                        boolean riAccessible = riField.isAccessible();
                        riField.setAccessible(true);
                        List<RequestInterceptor> requestInterceptors = (List<RequestInterceptor>) riField.get(entry.getValue());
                        for (RequestInterceptor interceptor : requestInterceptors) {
                            if (interceptor instanceof HmilyFeignInterceptor) {
                                requestInterceptors.remove(interceptor);
                                break;
                            }
                        }
                        riField.setAccessible(riAccessible);
                        log.info("{}.{} 方法移除 HmilyFeignInterceptor", beanName, entry.getKey().getName());
                    }
                }
                dispatchField.setAccessible(dispatchAccessible);
                h.setAccessible(hAccessible);
            } catch (Exception e) {
                log.warn("{} exception", beanName);
                e.printStackTrace();
            }
        }
        return bean;
    }
}

Map map // 會(huì)報(bào)錯(cuò)
Map map = new Map(); //則不會(huì)報(bào)錯(cuò)了

String str = null;
if（str.equals（“Test”））{undefined
//這里的代碼將不會(huì)被觸發(fā)，因?yàn)闀?huì)拋出java.lang.NullPointerException異常。
}

"Test".equals(str)