问题描述
Servlet.service() for servlet [springmvc] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException
原因一
导包导错
@Reference导包错误!错误包: import jdk.nashorn.internal.ir.annotations.Reference;
正确包:
import com.alibaba.dubbo.config.annotation.Reference;
原因二
Service层实现类未添加注解@Autowired
controller层没有加@ResponseBody
原因三
注意看看扫描包路径对不对
<!-- 扫描指定包,加入@Service注解的类会被发布为服务 -->
<dubbo:annotation package="com.atguigu.service" />