春季启动和多
我正在努力正确地获取多模块Spring Boot Maven项目的设置。 有没有我可以参考的示例项目？ 目前我有我的项目结构像这样。
数据模块：基本上是我的数据层。 包含我的POJO和我的数据库repo接口（PagingAndSortingRepository）。 该模块将是项目中其他模块的依赖项。 目前我已经在模块中放置了一个Config类，看起来像这样
public class Config {
@Configuration
@Profile("cloud")
static class CloudConfiguration extends AbstractCloudConfig {
@Bean
public DataSource dataSource() {
return connectionFactory().dataSource("session-questions-sql", new DataSourceConfig(new PoolConfig(4, 4), new ConnectionConfig("")));
}
}
@Configuration
@Profile("default")
static class LocalConfiguration {
}
}
我想这个配置在其他两个模块之间是很常见的，所以它属于数据模块。
文本模块：这是一个非常简单的模块，它包含一个REST API控制器，当一个文本消息发送到某个电话号码时将被调用。 它将文本消息存储在数据库中，并使用cdata模块的其中一个repo界面来执行此操作。 该模块正在构建为一个可执行的jar文件，并包含一个实现EmbeddedServletContainerCustomizer的类。
@Configuration
@ComponentScan
@EnableAutoConfiguration
@EnableJpaRepositories
public class App implements EmbeddedServletContainerCustomizer {
public static void main(String[] args) throws Exception {
SpringApplication.run(App.class, args);
}
@Override
public void customize(ConfigurableEmbeddedServletContainer container) {
//Enabled UTF-8 as the default character encoding for static HTML resources.
//If you would like to disable this comment out the 3 lines below or change
//the encoding to whatever you would like.
MimeMappings mappings = new MimeMappings(MimeMappings.DEFAULT);
mappings.add("html", "text/html;charset=utf-8");
container.setMimeMappings(mappings );
}
}
当我运行jar时，出现错误，说明其他控制器类无法从我的数据模块自动调用bean。 我看到一些帖子说你应该将包名称添加到@ComponentScan注释中。 例如
@ComponentScan（ “com.example.data”）
这样做会让嵌入式tomcat服务器启动，但我认为单独添加该包会导致Spring在我的文本模块中找不到我的REST控制器，因为我在获取404时遇到了API。 所以我也添加了我的文本包
@ComponentScan（{ “com.example.data”， “com.example.text”}）
然而，这又让我回到了同样的错误，Spring无法从数据模块中找到我的bean以自动装入我的REST控制器。
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.BeanCreationException: Error creating bean with name 'twilioController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.example.data.controllers.QuestionRepo com.example.questions.text.controller.TwilioController.questionRepo; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.example.data.controllers.QuestionRepo] 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)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:120)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:648)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:909)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:898)
at com.example.text.App.main(App.java:34)
... 6 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.example.data.controllers.QuestionRepo com.example.text.controller.TwilioController.questionRepo; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.example.data.controllers.QuestionRepo] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
... 22 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.example.data.controllers.QuestionRepo] 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)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1103)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:963)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
... 24 more
有没有人有任何指示如何正确地做到这一点？
存储库会自动从您的应用程序类的包（使用@EnableAutoConfiguration注释的包）进行扫描。 如果该默认值不适合您，可以使用相关的软件包轻松回@EnableJpaRepositories 。
我可以看到com.example.data和com.example.text 。 我猜你可能有一个项目特定的包，因为com.example可能太宽泛了。 所以解决这个问题的一种方法是将你的应用程序放在com.example （或者你的应用程序的根目录包）。
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