Java获取Springboot中bean案例
场景:当使⽤到⼯⼚模式的时候,并在⼯⼚实例中使⽤外部的service层对象,会这个对象是⼀个空对象,因此有必要通过spring去获取bean
1、SpringBeanUtil.java
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import t.ApplicationContext;
import t.ApplicationContextAware;
import org.springframework.stereotype.Component;
@Component
public class SpringBeanUtil implements ApplicationContextAware {
private static Logger springBeanUtilLog = Logger(SpringBeanUtil.class);
private static ApplicationContext applicationContext;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
if(SpringBeanUtil.applicationContext == null) {
SpringBeanUtil.applicationContext = applicationContext;
}
springBeanUtilLog.info("========ApplicationContext配置成功,在普通类可以通过调⽤AppContext()获取applicationContext对象,applicationContext={}",SpringBeanUtil.applicationContext);    }
/**
* 获取applicationContext
* @return
*/
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
/**
* 通过name获取 Bean.
* @param name
spring怎么读取配置* @return
*/
public static Object getBean(String name){
return getApplicationContext().getBean(name);
}
/**
* 通过class获取Bean.
* @param clazz
* @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
* @param clazz
* @param <T>
* @return
*/
public static <T> T getBean(String name,Class<T> clazz){
return getApplicationContext().getBean(name, clazz);
}
}
完毕

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