一.倒入相应jar包(下面会上传)
二.新建一个简单接口
public interface UserDao {
public void save() ;
}
新建接口实现类
public class UserDaoImpl implements UserDao {
@Override
public void save() {
System.out.println("执行了save方法");
}
}
三.配置文件applicationContext.xml
<?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">
<!-- id 唯一指定标志 class 指定实现类 -->
<bean id="userdao" class="com.cws.spring.demo1.UserDaoImpl">
</bean>
</beans>
四.调用实现类方法
public class UserTest {
@Test
public void test() {
//新建工厂,获取配置文件
ApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml");
//获取需要调用的bean
UserDao userService=(UserDao) applicationContext.getBean("userdao");
userService.save();
}