两个罐子之间的Spring Boot和@ComponentScan [英] Spring Boot and @ComponentScan between two jars

问题描述

我有2个项目。
一个是DAL项目，它使用spring neo4j API对neo4j数据库执行CRUD操作。该项目打包为jar并包含在项目＃2中。
Project＃2是一个Spring restful服务项目，它使用spring boot打包并创建一个可嵌入tomcat服务器上的可执行jar。

I have 2 projects. One is a DAL project that does CRUD operations on a neo4j DB using spring neo4j APIs . This project is packaged as a jar and included in project #2. Project #2 Is a Spring restful services project that uses spring boot to package and create an executable jar that runes on an embedded tomcat server.

当试图运行Spring引导为我创建的可执行jar，我一直得到这个异常。
预计至少有1个bean可以作为此依赖项的autowire候选者。依赖注释：{@ org.springframework.beans.factory.annotation.Autowired（required = true）}

When trying to run my executable jar that Spring boot has created for me I keep getting this exception. expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

根据我的阅读，如果我使用@ComponentScan我可以给注释目录查看。所以我给它我的服务项目的基础目录。我给它包含了DAL.jar的基础目录，但是这里的注释仍然没有运气。

Based off of my reading if I am using @ComponentScan I can give the annotation directories to look in. So I give it the base dir for my services project. And I give it the base dir for my included DAL.jar but still no luck here is what the annotation looks like.

从评论中提取：

组件扫描声明

@ComponentScan({"com.foo.dal.*","com.foo.notification.*"})

Stacktrace：

Stacktrace:

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pushCommandsController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.teradata.dal.example.PushRepository com.teradata.notification.rest.controller.PushCommandsController.repository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.teradata.dal.example.PushRepository] found for dependency:
expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

更新：

基于@chrylis回答：
更改为@ComponenetScan

based off of @chrylis answer: Made change to @ComponenetScan

@ComponentScan({"com.teradata.notification","com.teradata.dal"})

运行于：

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
at java.lang.Thread.run(Thread.java:744)
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.boot.autoconfigure.MessageSourceAutoConfiguration' is defined

有关DAL项目和服务项目的详细信息：

MORE DETAIL ON THE DAL PROJECT AND THE SERVICE PROJECT:

DAL PROJECT：

DAL PROJECT:

服务项目：

推荐答案

@ComponentScan <的参数/ code>是包名称，这些字符串不是有效的包。从中删除。* ; Spring会自动扫描子包。

The argument to @ComponentScan is a package name, and those strings aren't valid packages. Drop the .* from them; Spring scans subpackages automatically.

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