Spring Boot 下ApplicantionContext.getBean()方法获取Bean问题

深藏阁楼爱情的钟 2022-05-17 11:17 102阅读 0赞

Bean写法如下

import org.springframework.context.annotation.Bean;
    import org.springframework.stereotype.Service;
    
    import java.util.Date;
    
    /** * @Auther:WangZiBin * @Description: * @Modified By: */
    @Service("helloJob")
    public class HelloJob { 
    
        @Bean
        public int execute() {
            System.out.println("hello"+new Date().toString());
            return 1;
        }
    }

SpringContextUtils如下写法

package com.chineseall.gd.common.utils;
    
    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 { 
    
        public static ApplicationContext applicationContext; 
    
        @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(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);
        }
    
    }

获取bean

SpringContextUtils.getBean("helloJob");//注意填写为@Service中的名字

注意获取类中方法时同样需要添加@Bean注释，且方法需要提供返回值