Spring实现资源的动态加载和卸载的方法小结

@Configuration
public class DynamicBeanConfig {

    @Bean
    public MyBean myBean() {
        // 创建并返回MyBean实例
        return new MyBean();
    }
}

@Configuration
@Profile("dev")
public class DevConfig {

    @Bean
    public DataSource dataSource() {
        // 返回开发环境的DataSource
        return new DevDataSource();
    }
}

@Configuration
public class ConditionalBeanConfig {

    @Bean
    @Conditional(OnPropertyCondition.class)
    public MyBean myConditionalBean() {
        return new MyBean();
    }
}

public class BeanFactoryPostProcessorImpl implements BeanFactoryPostProcessor {

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {
        if (/* 条件满足 */) {
            beanFactory.registerSingleton("myDynamicBean", new MyBean());
        }
    }
}

public class SomeService {

    @Autowired
    private ApplicationContext applicationContext;

    public void someMethod() {
        MyBean myBean = new MyBean();
        applicationContext.registerBean(myBean);
    }
}

@Configuration
public class DynamicConfig {

    @Autowired
    private Environment env;

    @Bean
    public MyBean myBean() {
        String configValue = env.getProperty("my.config.value");
        if ("loadable".equals(configValue)) {
            return new MyBean();
        }
        return null;
    }
}

@Component
public class ApplicationEventListener implements ApplicationListener<ContextRefreshedEvent> {

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        // 应用启动后动态加载资源
    }
}

@Component
public class MyBean implements DisposableBean {

    @Override
    public void destroy() throws Exception {
        // 清理资源
    }
}

@Component
public class MyBean {

    @PreDestroy
    public void cleanup() {
        // 清理资源
    }
}