Sping--life cycle
bean.xml:
注意, 千万不要后面加上 scope="prototype"
<?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-2.5.xsd"> <bean id="u" class="com.bjsxt.dao.impl.UserDAOImpl"> </bean> <bean id="userService" class="com.bjsxt.service.UserService" init-method="init" destroy-method="destroy" scope="prototype"> <!-- <property name="userDAO" ref="u" /> --> <constructor-arg> <ref bean="u"/> </constructor-arg> </bean> </beans>
UserService.java:
package com.bjsxt.service; import com.bjsxt.dao.UserDAO; import com.bjsxt.model.User; public class UserService { private UserDAO userDAO; public void init() { System.out.println("init"); } public void add(User user) { userDAO.save(user); } public UserDAO getUserDAO() { return userDAO; } public void setUserDAO(UserDAO userDAO) { this.userDAO = userDAO; } public UserService(UserDAO userDAO) { super(); this.userDAO = userDAO; } public void destroy() { System.out.println("destroy"); } }
UserServiceTest.java:
package com.bjsxt.service; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.bjsxt.model.User; //Dependency Injection //Inverse of Control public class UserServiceTest { @Test public void testAdd() throws Exception { ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml"); UserService service = (UserService)ctx.getBean("userService"); UserService service2 = (UserService)ctx.getBean("userService"); ctx.destroy(); } }
结果init, init
去掉scope="prototype", 结果就是init, destroy