spring提供的几个常用可实现的接口

spring提供了很多可供用户实现的接口，当用户实现了这些接口。spring在不同的生命周期就会执行接口中相应的接口方法

比较重要的就是spring启动时的几个接口，这里只列了4个常用接口

BeanFactoryAware, BeanNameAware, InitializingBean, DisposableBean

写个测试类

package demo; import org.springframework.beans.BeansException; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.BeanFactoryAware; import org.springframework.beans.factory.BeanNameAware; import org.springframework.beans.factory.DisposableBean; import org.springframework.beans.factory.InitializingBean; public class Person implements BeanFactoryAware, BeanNameAware, InitializingBean, DisposableBean { private String name; private String address; private String phone; private BeanFactory beanFactory; private String beanName; public Person() { System.out.println("【构造器】调用Person的构造器实例化"); } public String getName() { return name; } public void setName(String name) { System.out.println("【注入属性】注入属性name"); this.name = name; } public String getAddress() { return address; } public void setAddress(String address) { System.out.println("【注入属性】注入属性address"); this.address = address; } public String getPhone() { return phone; } public void setPhone(String phone) { System.out.println("【注入属性】注入属性phone"); this.phone = phone; } public String toString() { return "Person [address=" + address + ", name=" + name + ", phone=" + phone + "]"; } // 这是BeanFactoryAware接口方法 public void setBeanFactory(BeanFactory arg0) throws BeansException { System.out .println("【BeanFactoryAware接口】调用BeanFactoryAware.setBeanFactory()"); this.beanFactory = arg0; } // 这是BeanNameAware接口方法 public void setBeanName(String arg0) { System.out.println("【BeanNameAware接口】调用BeanNameAware.setBeanName()"); this.beanName = arg0; } // 这是InitializingBean接口方法 public void afterPropertiesSet() throws Exception { System.out.println("【InitializingBean接口】调用InitializingBean.afterPropertiesSet()"); } // 这是DiposibleBean接口方法 public void destroy() throws Exception { System.out.println("【DiposibleBean接口】调用DiposibleBean.destory()"); } // 通过<bean>的init-method属性指定的初始化方法 public void myInit() { System.out.println("【init-method】调用<bean>的init-method属性指定的初始化方法"); } // 通过<bean>的destroy-method属性指定的初始化方法 public void myDestory() { System.out.println("【destroy-method】调用<bean>的destroy-method属性指定的初始化方法"); } }

启动后看到输入如下

【构造器】调用Person的构造器实例化【注入属性】注入属性address【注入属性】注入属性name【注入属性】注入属性phone【BeanNameAware接口】调用BeanNameAware.setBeanName()【BeanFactoryAware接口】调用BeanFactoryAware.setBeanFactory()【InitializingBean接口】调用InitializingBean.afterPropertiesSet()【init-method】调用<bean>的init-method属性指定的初始化方法

看到执行顺序为构造函数，属性注入

BeanNameAware.setBeanName()

BeanFactoryAware.setBeanFactory()

InitializingBean.afterPropertiesSet()

init-method

转载于:https://www.cnblogs.com/liguangming/p/9933197.html