[Java知识库]spring中如何动态创建Bean代码:(4.4-4.10)

Bean对象创建的三种方式:1.通过构造方法进行<bean id: class>定义; 2.通过工厂对象调用普通方法的创建对象;3.通过工厂对象调用静态方法的创建对象;

手动创建Bean对象:
前提是该类已注入Spring容器,简单代码如下:
@Component
public class BeanTest{
? ? @Autowired
? ? private ApplicationContext applicationContext ;
? ? public void test1() throws Exception{
? ? ConfigurableApplicationContext configurableApplicationContext = (ConfigurableApplicationContext) applicationContext ;
? ? ConfigurableListableBeanFactory beanFactory = configurableApplicationContext.getBeanFactory();
? ? ConcurrentHashMap<String,Channel> channelsMap = new ConCurrentHashMap();
? ? beanFactory.registerSingleton("channelsMap",channelsMap) ;
? ? }
? ? public void test2() throws Exception{
? ? ConcurrentHashMap channelsMap = applicationContext.getBean("ChannelsMap",ConcurrentHashMap.class);
? ? }
}