工具类从spring里面获取对象

懒惰の天真热2024-03-02 14:48

创建工具类

/**

spring容器的相关方法，如根据名称获取spring实例
@author 天真热
@create 2022-04-28 9:55
@desc
**/

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

@Component
public class SpringContextUtils implements ApplicationContextAware {
private static ApplicationContext applicationContext;

复制代码

 @Override
 public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
     SpringContextUtils.applicationContext = applicationContext;
 }

 public static Object getBean(String name) {
     return applicationContext.getBean(name);
 }

 public static <T> T getBean(Class<T> requiredType) {
     return applicationContext.getBean(requiredType);
 }

 public static <T> T getBean(String name, Class<T> requiredType) {
     return applicationContext.getBean(name, requiredType);
 }

 public static boolean containsBean(String name) {
     return applicationContext.containsBean(name);
 }

 public static boolean isSingleton(String name) {
     return applicationContext.isSingleton(name);
 }

 public static Class<? extends Object> getType(String name) {
     return applicationContext.getType(name);
 }

}

2.调用

ps：正常我们不指定类注入到spring的名称，默认都是使用"首字母小写的类名"作为名称

复制代码

 TaskRunKafkaLogService taskRunKafkaLogService = (TaskRunKafkaLogService) SpringContextUtils.getBean("taskRunKafkaLogServiceImpl");