将bean注入到Spring中的方式总结

public class Person {  
    private String name;  
    private int age;  
      
    // 此处1构造方法、setter、getter省略  
}

xml
<beans xmlns="http://www.springframework.org/schema/beans"  
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
       xsi:schemaLocation="http://www.springframework.org/schema/beans   
       http://www.springframework.org/schema/beans/spring-beans.xsd">  
      
    <bean id="person" class="com.example.Person">  
        <property name="name" value="John"/>  
        <property name="age" value="25"/>  
    </bean>  
</beans>

ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");  
Person person = (Person) context.getBean("person");

@Component("person")  
public class Person {  
    // ... 类的其它代码 ...  
}

xml
<context:component-scan base-package="com.example"/>

@Configuration  
@ComponentScan(basePackages = "com.example")  
public class AppConfig { }

@Configuration  
public class AppConfig {  
    @Bean(name = "person")  
    public Person person() {  
        Person person = new Person();  
        person.setName("John");  
        person.setAge(25);  
        return person;  
    }  
}

ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);  
Person person = (Person) context.getBean("person");