Spring Boot 自定义Bean生命周期方式实现InitializingBean、DisposableBean

冷不防 2022-10-28 03:45 132阅读 0赞

实现接口

import org.springframework.beans.factory.DisposableBean;
    import org.springframework.beans.factory.InitializingBean;
    
    public class College implements InitializingBean, DisposableBean { 
        @Override
        public void afterPropertiesSet() throws Exception { 
            System.out.println("Initial method is calling.");
        }
    
        @Override
        public void destroy() throws Exception { 
            System.out.println("Destroyed method is calling.");
        }
    }

注入

import com.michael.annotation.demo.POJO.College;
    import org.springframework.context.annotation.*;
    
    @Configuration
    public class MyConfig { 
    
        @Scope("singleton")//这里可以不写，Bean默认为单例
        @Bean("St Andrews")
        public College college(){ 
            System.out.println("The Bean is created.");
            return new College();
        }
    }

测试

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.ApplicationContext;
    
    import static java.lang.System.out;
    @SpringBootApplication
    public class DemoApplication { 
    
        public static void main(String[] args) { 
            ApplicationContext applicationContext = SpringApplication.run(DemoApplication.class, args);
            out.println("The container has been initialized.");
             for(String name : applicationContext.getBeanDefinitionNames()){ 
                 if(!name.contains("."))
                    out.println(name);
            }
            out.println("The container has been destroyed.");
        }
    }

输出

The Bean is created.
    Initial method is calling.
    2020-03-24 18:32:22.375  INFO 24519 --- [           main] c.m.annotation.demo.DemoApplication      : Started DemoApplication in 0.611 seconds (JVM running for 0.903)
    The container has been initialized.
    demoApplication
    test
    myConfig
    personService
    St Andrews
    propertySourcesPlaceholderConfigurer
    taskExecutorBuilder
    applicationTaskExecutor
    taskSchedulerBuilder
    The container has been destroyed.
    Destroyed method is calling.