Java的普通类获取注册的bean

---

配置

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @className: ApplicationContextHelper.java
 * @description:  获取 ApplicationContext
 * @author: Demon
 */
@Component
public class ApplicationContextHelper implements ApplicationContextAware {

	private static ApplicationContext appCtx;

	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		System.out.println("初始化applicationContext："+applicationContext.getBeanDefinitionNames().length);
		appCtx = applicationContext;
	}

	/**
	 * 通过name获取 Bean.
	 * @param name bean名
	 * @return 返回
	 */
	public static Object getBean(String name) {
		return appCtx.getBean(name);
	}

	/**
	 * 通过class获取Bean.
	 * @param clazz bean类
	 * @return 返回
	 */
	public static <T> T getBean(Class<T> clazz) {
		return appCtx.getBean(clazz);
	}

	/**
	 * 通过name,以及Clazz返回指定的Bean
	 * @param name bean名
	 * @param clazz bean类
	 * @return 返回
	 */
	public static <T> T getBean(String name, Class<T> clazz) {
		return appCtx.getBean(name, clazz);
	}
}

使用

获取 RestTemplate 的 bean

RestTemplate  restTemplate = ApplicationContextHelper.getBean(RestTemplate.class);