package com.spring.helloworld;public class Car {    public Car(){        System.out.println("先调用构造器方法");    }    private String company;    private String brand;    private int maxSpeed;    public void setCompany(String company) {        System.out.println("2：调用set方法");        this.company = company;    }    public void setBrand(String brand) {        this.brand = brand;    }    public void setMaxSpeed(int maxSpeed) {        this.maxSpeed = maxSpeed;    }    @Override    public String toString() {        return "Car [company=" + company + ", brand=" + brand + ", maxSpeed="                + maxSpeed + "]";    }    public void init(){        System.out.println("3:调用init方法");    }    public void destroy(){        System.out.println("4:关闭IOC的时候 ，调用destroy");    }    }

在配置文件中进行设定哪个方法是初始化方法。哪个是销毁方法

package com.spring.helloworld;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Main {    public static void main(String[] args) {        //1:创建IOC容器        ClassPathXmlApplicationContext act=new ClassPathXmlApplicationContext("applicationContext.xml");        //2：从IOC中获得Bean实例        Car car=(Car) act.getBean("car");        System.out.println(car);        act.close();    }}

 

2：在进行初始化前可以进行一些操作

1 package com.spring.helloworld; 2  3 import org.springframework.beans.BeansException; 4 import org.springframework.beans.factory.config.BeanPostProcessor; 5  6 public class MyBeanPostProcessor implements BeanPostProcessor{ 7  8     @Override 9     public Object postProcessAfterInitialization(Object bean, String beanName)10             throws BeansException {11         System.out.println("初始化方法后进行");12         System.out.println(bean+"--"+beanName);13         return bean;14     }15 16     @Override17     public Object postProcessBeforeInitialization(Object bean, String beanName)18             throws BeansException {19         System.out.println("初始化方法前进行");20         System.out.println(bean+"--"+beanName);21         return bean;22     }23 24 }