spring配置文件生命周期配置

1、Bean的生命周期配置

init-method:指定类中的初始化方法名称；

destroy-method:指定类中销毁方法的名称；

2、配置如下：注意不能写成这种情况：不然会报这种错误；

<?xml version="1.0" encoding="UTF-8"?> <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="UserDao" class="com.hkf.impl.UserDaoIpml"></bean>--> <!-- <bean id="UserDao" class="com.hkf.impl.UserDaoIpml" scope="singleton"></bean>--> <bean id="UserDao" class="com.hkf.impl.UserDaoIpml" init-method="init" destroy-method="destroy"></bean> </beans>

3、如果同一个Dao写两次Bean，会报错误；这个错误一般会报Bean已经被使用，就是这种情况

org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Bean name 'UserDao' is already used in this <beans> element Offending resource: class path resource [springContext.xml]

4、如果要显示销毁的方法就要记得关闭调用配置文件的这个方法；

@Test public void test1(){ ClassPathXmlApplicationContext classPathXmlApplicationContext = new ClassPathXmlApplicationContext("springContext.xml"); UserDao userDao = (UserDao) classPathXmlApplicationContext.getBean("UserDao"); UserDao userDao1 = (UserDao) classPathXmlApplicationContext.getBean("UserDao"); classPathXmlApplicationContext.close(); System.out.println(userDao); System.out.println(userDao1);