Spring Boot - 多个配置类 - 导入无效

Question

（第一次在这个论坛发帖提问，所以请忽略任何愚蠢的东西） 处理面向Spring Boot的新项目，该项目有多个配置类（Security，DataSourceConfig，DataConfig）。问题是DataConfig正在使用DataSourceConfig中定义的一些bean，但是由于DataConfig首先加载，所以它没有得到那种依赖。

@Configuration
public class DataSourceConfig {

    @Bean(name="abcDataSource")
    public DataSource abcDataSource() {
        final JndiDataSourceLookup dsLookup = new JndiDataSourceLookup();
        dsLookup.setResourceRef(true);
        DataSource dataSource = dsLookup.getDataSource("java:comp/env/jdbc/ABC");
        return dataSource;
    }

    @Bean(name="xyzDataSource")
    @Lazy
    public DataSource xyzDataSource() {
        final JndiDataSourceLookup dsLookup = new JndiDataSourceLookup();
        dsLookup.setResourceRef(true);
        DataSource dataSource = dsLookup.getDataSource("java:comp/env/jdbc/XYZ");
        return dataSource;
    }
}

@Import({DataSourceConfig.class})
@Configuration
public class DataConfig {

    @Autowired 
    DataSource xyzDataSource;

    @Bean
    public PropertyPlaceholderConfigurer propertyPlaceholderConfigurer() throws Exception {
        PropertyPlaceholderConfigurer p = new PropertyPlaceholderConfigurer();
        p.setProperties(commonsConfigurationFactoryBean());
        return p;
    }

    @Bean
    public Properties commonsConfigurationFactoryBean() {
        return ConfigurationConverter.getProperties(databaseConfiguration());
    }

    @Bean
    @Autowired
    public DatabaseConfiguration databaseConfiguration() {
        return new DatabaseConfiguration(xyzDataSource, "Table_Name", "Key_Column", "Value_Column");

    }
}

因此，当我在DEBUG模式下启动TOMCAT服务器（不是嵌入式服务器）时，在DataConfig.databaseConfiguration（）和DataSourceConfig.xyzDataSource（）上有断点，它总是转到前一个而不是以后，这导致问题并给出“NullPointerException”以获取数据源。

我不知道为什么'@Import'不适用于此。任何帮助都会非常适合。如果您需要我的任何其他信息，请告诉我。

异常追踪：

Caused by: java.lang.NullPointerException
    at org.apache.commons.configuration.DatabaseConfiguration.getConnection(DatabaseConfiguration.java:568) ~[commons-configuration-1.6.jar:1.6]
    at org.apache.commons.configuration.DatabaseConfiguration.getKeys(DatabaseConfiguration.java:515) ~[commons-configuration-1.6.jar:1.6]
    at org.apache.commons.configuration.ConfigurationConverter.getProperties(ConfigurationConverter.java:112) ~[commons-configuration-1.6.jar:1.6]
    at com.mcmcg.apollo.common.datasource.DataConfig.commonsConfigurationFactoryBean(DataConfig.java:35) ~[classes/:?]
    at com.mcmcg.apollo.common.datasource.DataConfig$$EnhancerBySpringCGLIB$$bb4c1776.CGLIB$commonsConfigurationFactoryBean$1(<generated>) ~[classes/:?]
    at com.mcmcg.apollo.common.datasource.DataConfig$$EnhancerBySpringCGLIB$$bb4c1776$$FastClassBySpringCGLIB$$40819bbc.invoke(<generated>) ~[classes/:?]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at com.mcmcg.apollo.common.datasource.DataConfig$$EnhancerBySpringCGLIB$$bb4c1776.commonsConfigurationFactoryBean(<generated>) ~[classes/:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_73]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_73]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_73]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1128) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1023) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:381) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at com.mcmcg.apollo.common.datasource.DataConfig$$EnhancerBySpringCGLIB$$bb4c1776.commonsConfigurationFactoryBean(<generated>) ~[classes/:?]
    at com.mcmcg.apollo.common.datasource.DataConfig.propertyPlaceholderConfigurer(DataConfig.java:29) ~[classes/:?]
    at com.mcmcg.apollo.common.datasource.DataConfig$$EnhancerBySpringCGLIB$$bb4c1776.CGLIB$propertyPlaceholderConfigurer$0(<generated>) ~[classes/:?]
    at com.mcmcg.apollo.common.datasource.DataConfig$$EnhancerBySpringCGLIB$$bb4c1776$$FastClassBySpringCGLIB$$40819bbc.invoke(<generated>) ~[classes/:?]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at com.mcmcg.apollo.common.datasource.DataConfig$$EnhancerBySpringCGLIB$$bb4c1776.propertyPlaceholderConfigurer(<generated>) ~[classes/:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_73]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_73]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_73]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    ... 27 more