Spring 手动从 IoC 获取 Bean 的代码如下:
import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.stereotype.Component; @Component public class SpringUtils implements ApplicationContextAware { private static ApplicationContext applicationContext; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if(SpringUtils.applicationContext == null) { SpringUtils.applicationContext = applicationContext; } } /** * 获取applicationContext * @return */ public static ApplicationContext getApplicationContext() { return applicationContext; } /** * 通过name获取 Bean * @param name Bean名称 * @return */ public static Object getBean(String name){ return getApplicationContext().getBean(name); } /** * 通过class获取Bean * @param clazz Bean的Class类型 * @param <T> * @return */ public static <T> T getBean(Class<T> clazz){ return getApplicationContext().getBean(clazz); } /** * 通过name,以及Clazz返回指定的Bean * @param name Bean名称 * @param clazz Bean的Class类型 * @param <T> * @return */ public static <T> T getBean(String name,Class<T> clazz){ return getApplicationContext().getBean(name, clazz); } }