Spring Boot 獲取Bean對象實體
阿新 • • 發佈:2018-01-30
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一、實現 ApplicationContextAware 接口
package com.zxguan; import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; /** * @author zxguan * @description * @create 2018-01-29 15:21 */ public class SpringUtil implements ApplicationContextAware {private static ApplicationContext applicationContext = null; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if(SpringUtil.applicationContext == null){ SpringUtil.applicationContext = applicationContext; } }//獲取applicationContext public static ApplicationContext getApplicationContext() { return applicationContext; } //通過name獲取 Bean. public static Object getBean(String name){ return getApplicationContext().getBean(name); } //通過class獲取Bean. public static <T> T getBean(Class<T> clazz){return getApplicationContext().getBean(clazz); } //通過name,以及Clazz返回指定的Bean public static <T> T getBean(String name,Class<T> clazz){ return getApplicationContext().getBean(name, clazz); } }
二、幾種方式
1、在Spring Boot可以掃描的包下, SpringUtil 使用註解@Component
2、不在Spring Boot的掃描包下方式一, 使用@Bean註解,註入Spring容器
3、不在Spring Boot的掃描包下方式二, 在App.class類上使用@Import(value={SpringUtil.class})
Spring Boot 獲取Bean對象實體