Spring系列Bean注解的使用介绍

今天给大家介绍一下Spring中Bean注解的用法，后续文章会为大家介绍Spring的其他注解用法。希望对您的日常工作有所帮助！1、首先创建一个maven项目，引入spring依赖org.springframeworkspring-context5.3.92。新建person.java实体类包com.spring.bean；公共类Person{私有字符串名称；私人整数年龄；私有字符串地址；publicPerson(Stringname,Integerage,Stringaddress){this.name=name;这个。年龄=年龄；this.address=地址；}publicPerson(){}publicStringgetName(){返回姓名；}publicvoidsetName(Stringname){this.name=name;}publicIntegergetAge(){返回年龄；}publicvoidsetAge(Integerage){this.age=age;}publicStringgetAddress(){返回地址；}publicvoidsetAddress(Stringaddress){this.address=address;}@OverridepublicStringtoString(){return"Person{"+"name='"+name+'\''+",age='"+age+'\''+",地址='"+地址+'\''+'}';}}3.新建配置类TestBeanConfig.javapackagecom.spring.config;importcom.spring.bean.Person;importorg.springframework.context.annotation.Bean;importorg.springframework.context.annotation.Configuration;@ConfigurationpublicclassTestBeanConfig{/*@Bean是注册一个bean，type是返回值的类型，默认是用方法名作为id，可以自己定义*value可以自定义id，默认一样作为方法名**/@Bean(value="person1")publicPersonperson(){returnnewPerson("小王",35,"北京");}}4、资源创建配置文件5.新建一个测试类TestBean.java，具体展示实例注解和配置方法包com.spring.test;importcom.spring.bean。人；导入com.spring.config.TestBeanConfig；导入org.springframework.context.annotation.AnnotationConfigApplicationContext；导入org.springframework.context.support.ClassPathXmlApplicationContext；公共类TestBean{publicstaticvoidmain(String[]args){//配置文件方法ClassPathXmlApplicationContextapplicationContext=newClassPathXmlApplicationContext("person.xml");Personbean=(Person)applicationContext.getBean("person");System.out.println("Configurationmethod:");System.out.println(bean);//注解方法AnnotationConfigApplicationContext注解方式获取spring容器AnnotationConfigApplicationContextannotationContext=newAnnotationConfigApplicationContext(TestBeanConfig.class);PersonannotationPerson=(Person)annotationContext.getBean("person1");System.out.println("Annotationmethod:");System.out.println(annotationPerson);//用于获取指定类型的所有JavaBeans的名称Spring容器String[]beanNamesForType=annotationContext.getBeanNamesForType(Person.class);for(Stringitem:beanNamesForType){System.out.println(item);}}}6.运行效果：