Spring动态添加Bean

Spring动态添加Bean，需要使用到BeanDefinitionRegistryPostProcessor

public class DataSourcesBeanFactoryPostProcessor implements BeanDefinitionRegistryPostProcessor {private final List customerKeys;public DataSourcesBeanFactoryPostProcessor(Environment springEnvironment) {parseCustomerKeys(springEnvironment.getProperty("customerKeys"));}@Overridepublic void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {for (String customerKey : customerKeys) {String dataSourceName = "dataSource_" + customerKey;BeanDefinitionBuilder definitionBuilder =BeanDefinitionBuilder.genericBeanDefinition(JndiObjectFactoryBean.class);definitionBuilder.addPropertyValue("jndiName", "jdbc/" + dataSourceName);registry.registerBeanDefinition(dataSourceName, definitionBuilder.getBeanDefinition());}}@Overridepublic void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {// we actually only add new beans, but do not post process the existing definitions}private static List parseCustomerKeys(String rawCustomerKeys) {if (StringUtils.isEmpty(rawCustomerKeys)){throw new IllegalArgumentException("Property 'customerKeys' is undefined.");}return Collections.unmodifiableList(Arrays.asList(StringUtils.split(rawCustomerKeys, ",")));}
}

参考：How to Create Your Own 'Dynamic' Bean Definitions in Spring

如果能拿到ApplicationContext对象，则还可以通过这种方式来注册Bean对象

context.getBeanFactory().registerSingleton(beanName, singletonObject)

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