Java Config @Bean未在其他@Configuration类中自动接线 [英] Java Config @Bean not autowired in other @Configuration class
本文介绍了Java Config @Bean未在其他@Configuration类中自动接线的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
尝试使用Java Config设置Spring 4 Web应用程序时，我遇到了将在配置类中创建的bean自动装配到另一个配置类中的问题. 数据源" bean在MyBatisConfig类中具有空值.这似乎是配置中唯一未正确接线的bean.查看Spring调试日志(请参见下面的最后一个代码块中的日志的最后部分)，它看起来已正确实例化，但似乎也被销毁了?我的配置有什么问题?
Trying to setup a Spring 4 web application with Java Config, I encounter a problem with autowiring a bean created in a configuration class into another configuration class. The 'dataSource' bean has a null value in the MyBatisConfig class. This seems to be the only bean in the configuration that doesn't get wired properly. Looking at the Spring debug logs (see last part of logs in the last code block below) it looks instantiated properly, but also seems to be destroyed?. What could be wrong in my configuration?
PropertySourcesPlaceholderConfigurerConfig类:
PropertySourcesPlaceholderConfigurerConfig class:
package nl.somesite.teamshot.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.core.io.ClassPathResource;
@Configuration
public class PropertySourcesPlaceholderConfigurerConfig {
@Bean
public PropertySourcesPlaceholderConfigurer propertyConfigurer() {
PropertySourcesPlaceholderConfigurer propertyConfigurer = new PropertySourcesPlaceholderConfigurer();
propertyConfigurer.setLocation(new ClassPathResource("application.properties"));
/*propertyConfigurer.setLocation(new ClassPathResource("file:${catalina.home}/conf/application.properties"));
propertyConfigurer.setLocation(new ClassPathResource("/var/lib/openshift/517874b8e0b8cd218e000391/app-root/data/apache-tomcat-7.0.39/conf/application.properties"));*/
propertyConfigurer.setIgnoreUnresolvablePlaceholders(false);
propertyConfigurer.setIgnoreResourceNotFound(true);
return propertyConfigurer;
}
}
DbConfig类:
DbConfig class:
package nl.somesite.teamshot.config;
import org.apache.commons.dbcp.BasicDataSource;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
@Configuration
@Import({PropertySourcesPlaceholderConfigurerConfig.class})
public class DbConfig {
private @Value("jdbc:mysql://${OPENSHIFT_MYSQL_DB_HOST}:${OPENSHIFT_MYSQL_DB_PORT}/${OPENSHIFT_MYSQL_DATABASE}") String url;
private @Value("${OPENSHIFT_MYSQL_DB_USERNAME}") String username;
private @Value("${OPENSHIFT_MYSQL_DB_PASSWORD}") String password;
static Logger log = LogManager.getLogger(DbConfig.class.getName());
@Bean
public BasicDataSource dataSource() {
log.debug("Creating dataSource bean, url = "+ url);
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
dataSource.setDefaultAutoCommit(false);
log.debug("dataSource bean url = "+ dataSource.getUrl());
return dataSource;
}
}
MyBatisConfig类:
MyBatisConfig class:
package nl.somesite.teamshot.config;
import java.io.IOException;
import org.apache.commons.dbcp.BasicDataSource;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
@Configuration
@Import({DbConfig.class})
public class MyBatisConfig {
@Autowired private BasicDataSource dataSource;
static Logger log = LogManager.getLogger(MyBatisConfig.class.getName());
@Bean
public SqlSessionFactoryBean sqlSessionFactory() {
log.debug("Creating SqlSessionFactoryBean, dataSource = " + dataSource);
SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();
sqlSessionFactory.setDataSource(dataSource);
PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
org.springframework.core.io.Resource[] classPathResources;
try {
classPathResources = resolver.getResources("classpath*:/mappers/*.xml");
sqlSessionFactory.setMapperLocations(classPathResources);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return sqlSessionFactory;
}
@Bean
public MapperScannerConfigurer mapperScannerConfigurer() {
log.debug("Creating MapperScannerConfigurer");
MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
mapperScannerConfigurer.setBasePackage("nl.somesite.teamshot.data");
return mapperScannerConfigurer;
}
}
AppConfig类:
AppConfig class:
package nl.somesite.teamshot.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
@Configuration
@ComponentScan(basePackages = {"nl.somesite.teamshot.config"})
public class AppConfig {
}
AppInitializer类:
AppInitializer class:
package nl.somesite.teamshot.initializer;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
public class AppInitializer implements WebApplicationInitializer {
private static final String CONFIG_LOCATION = "nl.somesite.teamshot.config";
private static final String MAPPING_URL = "/";
static Logger log = LogManager.getLogger(AppInitializer.class.getName());
public void onStartup(ServletContext servletContext) throws ServletException {
WebApplicationContext context = getContext();
servletContext.addListener(new ContextLoaderListener(context));
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet", new DispatcherServlet(context));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping(MAPPING_URL);
}
private AnnotationConfigWebApplicationContext getContext() {
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.setConfigLocation(CONFIG_LOCATION);
return context;
}
}
WebMvcConfig类:
WebMvcConfig class:
package nl.somesite.teamshot.config;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
@Configuration
@EnableWebMvc
public class WebMvcConfig extends WebMvcConfigurerAdapter {
static Logger log = LogManager.getLogger(WebMvcConfig.class.getName());
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
@Bean
public ViewResolver internalResourceViewResolver() {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".jsp");
return resolver;
}
}
日志的最后一部分:
[DEBUG:] 2014-07-09 01:25:20 [DefaultSingletonBeanRegistry line:220] Creating shared instance of singleton bean 'dataSource'
[DEBUG:] 2014-07-09 01:25:20 [AbstractAutowireCapableBeanFactory line:449] Creating instance of bean 'dataSource'
[DEBUG:] 2014-07-09 01:25:20 [AbstractBeanFactory line:249] Returning cached instance of singleton bean 'dbConfig'
[DEBUG:] 2014-07-09 01:25:20 [DbConfig line:25] Creating dataSource bean, url = jdbc:mysql://localhost:3306/teamshot?useUnicode=true&characterEncoding=UTF-8
[DEBUG:] 2014-07-09 01:25:20 [DbConfig line:34] dataSource bean url = jdbc:mysql://localhost:3306/teamshot?useUnicode=true&characterEncoding=UTF-8
[DEBUG:] 2014-07-09 01:25:20 [AbstractAutowireCapableBeanFactory line:523] Eagerly caching bean 'dataSource' to allow for resolving potential circular references
[DEBUG:] 2014-07-09 01:25:20 [AbstractAutowireCapableBeanFactory line:477] Finished creating instance of bean 'dataSource'
[DEBUG:] 2014-07-09 01:25:20 [DefaultSingletonBeanRegistry line:220] Creating shared instance of singleton bean 'sqlSessionFactory'
[DEBUG:] 2014-07-09 01:25:20 [AbstractAutowireCapableBeanFactory line:449] Creating instance of bean 'sqlSessionFactory'
[DEBUG:] 2014-07-09 01:25:20 [AbstractBeanFactory line:249] Returning cached instance of singleton bean 'myBatisConfig'
[DEBUG:] 2014-07-09 01:25:20 [MyBatisConfig line:27] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 01:25:20 [PathMatchingResourcePatternResolver line:553] Looking for matching resources in directory tree [D:\Eclipse workspaces\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\teamshot\WEB-INF\classes\mappers]
[DEBUG:] 2014-07-09 01:25:20 [PathMatchingResourcePatternResolver line:615] Searching directory [D:\Eclipse workspaces\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\teamshot\WEB-INF\classes\mappers] for files matching pattern [D:/Eclipse workspaces/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/teamshot/WEB-INF/classes/mappers/*.xml]
[DEBUG:] 2014-07-09 01:25:20 [PathMatchingResourcePatternResolver line:354] Resolved location pattern [classpath*:/mappers/*.xml] to resources [file [D:\Eclipse workspaces\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\teamshot\WEB-INF\classes\mappers\newsitems.xml], file [D:\Eclipse workspaces\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\teamshot\WEB-INF\classes\mappers\teams.xml]]
[DEBUG:] 2014-07-09 01:25:20 [AbstractAutowireCapableBeanFactory line:523] Eagerly caching bean 'sqlSessionFactory' to allow for resolving potential circular references
[DEBUG:] 2014-07-09 01:25:20 [AbstractAutowireCapableBeanFactory line:1595] Invoking afterPropertiesSet() on bean with name 'sqlSessionFactory'
[DEBUG:] 2014-07-09 01:25:20 [DefaultSingletonBeanRegistry line:474] Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@3278a91: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,appConfig,dbConfig,myBatisConfig,propertySourcesPlaceholderConfigurerConfig,webMvcConfig,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor,org.springframework.context.annotation.ConfigurationClassPostProcessor.enhancedConfigurationProcessor,dataSource,sqlSessionFactory,mapperScannerConfigurer,propertyConfigurer,org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration,requestMappingHandlerMapping,mvcContentNegotiationManager,viewControllerHandlerMapping,beanNameHandlerMapping,resourceHandlerMapping,defaultServletHandlerMapping,requestMappingHandlerAdapter,mvcConversionService,mvcValidator,mvcUriComponentsContributor,httpRequestHandlerAdapter,simpleControllerHandlerAdapter,handlerExceptionResolver,internalResourceViewResolver,newsItemMapper,teamMapper]; root of factory hierarchy
[DEBUG:] 2014-07-09 01:25:20 [DisposableBeanAdapter line:322] Invoking destroy method 'close' on bean with name 'dataSource'
[DEBUG:] 2014-07-09 01:25:20 [DisposableBeanAdapter line:244] Invoking destroy() on bean with name 'webMvcConfig'
[DEBUG:] 2014-07-09 01:25:20 [DisposableBeanAdapter line:244] Invoking destroy() on bean with name 'dbConfig'
[DEBUG:] 2014-07-09 01:25:21 [DisposableBeanAdapter line:244] Invoking destroy() on bean with name 'appConfig'
[DEBUG:] 2014-07-09 01:25:21 [DisposableBeanAdapter line:244] Invoking destroy() on bean with name 'propertySourcesPlaceholderConfigurerConfig'
[ERROR:] 2014-07-09 01:25:21 [ContextLoader line:331] Context initialization failed Error creating bean with name 'sqlSessionFactory' defined in class path resource [nl/somesite/teamshot/config/MyBatisConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'dataSource' is required
jul 09, 2014 1:25:21 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [nl/somesite/teamshot/config/MyBatisConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'dataSource' is required
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:681)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.IllegalArgumentException: Property 'dataSource' is required
at org.springframework.util.Assert.notNull(Assert.java:112)
at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:337)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
... 22 more
如果禁用Spring调试日志记录，则会看到以下内容:
If I disable Spring debug logging I see this:
[DEBUG:] 2014-07-09 11:02:19 [MyBatisConfig line:50] Creating MapperScannerConfigurer
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [DbConfig line:24] Creating dataSource bean, url = jdbc:mysql://localhost:3306/teamshot?useUnicode=true&characterEncoding=UTF-8
[DEBUG:] 2014-07-09 11:02:20 [DbConfig line:33] dataSource bean url = jdbc:mysql://localhost:3306/teamshot?useUnicode=true&characterEncoding=UTF-8
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[DEBUG:] 2014-07-09 11:02:20 [MyBatisConfig line:30] Creating SqlSessionFactoryBean, dataSource = null
[ERROR:] 2014-07-09 11:02:20 [ContextLoader line:331] Context initialization failed Error creating bean with name 'sqlSessionFactory' defined in class path resource [nl/somesite/teamshot/config/MyBatisConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'dataSource' is required
推荐答案
阅读了很多与Spring相关的内容之后，我发现MapperScannerConfigurer是BeanFactoryPostProcessor的实现.在@Configuration类中使用BeanFactoryPostProcessor会破坏该@Configuration类的默认后处理.
After reading a lot of Spring related stuff I discovered that the MapperScannerConfigurer is a implementation of BeanFactoryPostProcessor. Having a BeanFactoryPostProcessor in a @Configuration class breaks the default post-processing of that @Configuration class.
在处理过程中存在根本的生命周期冲突 @Configuration类中的BeanFactoryPostProcessor @Bean方法 使用@ Autowired，@ PostConstruct，@ Value等.因为BFPP必须 在生命周期的早期实例化，它们会导致早期实例化 他们声明@Configuration类的原因-为时过早， AutowiredAnnotationBeanPostProcessor和 朋友们. 参见 https://jira.spring.io/browse/SPR-8269
There is a fundamental lifecycle conflict in handling BeanFactoryPostProcessor @Bean methods within @Configuration classes that use @Autowired, @PostConstruct, @Value, etc. Because BFPPs must be instantiated early in the lifecycle, they cause early instantiation of their declaring @Configuration class - too early to recieve the usual post-processing by AutowiredAnnotationBeanPostProcessor and friends. See https://jira.spring.io/browse/SPR-8269
将MapperScannerConfigurer bean方法与MyBatisConfig分离到其自己的类中即可解决此问题.
Separating the MapperScannerConfigurer bean method from MyBatisConfig into it's own class solves the problem.
这篇关于Java Config @Bean未在其他@Configuration类中自动接线的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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