01--Spring容器组件--@Configuration和@Bean

public class PersonBean {
    private String name;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return "PersonBean [name=" + name + ", id=" + id + "]";
    }
    public PersonBean() {
        super();
        // TODO Auto-generated constructor stub
    }
    public PersonBean(String name, String id) {
        super();
        this.name = name;
        this.id = id;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    private String id;
}

 

//配置类==配置文件（xml）
@Configuration   //告诉Spring这个一个配制类
public class BeanConfig {
    
    //给容器注册一个Bean，类型class：默认为返回值的类型，标识id：默认为方法名
    @Bean("person")
    public PersonBean personBean(){
        return new PersonBean("lishi","20");
    }
} 

public class MainTest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ApplicationContext applicationContext = new AnnotationConfigApplicationContext(BeanConfig.class);
        System.out.println(applicationContext.getBean("person"));
        
    }

}