Bean实例化三种方式

package factory;

import ioc1.it.dao.userDao;
import ioc1.it.dao.userDaoImpl;

public class staticFactory {
    public static userDao getUser(){
        return new userDaoImpl();
    }
}

<bean id="userDao" class="factory.staticFactory" factory-method="getUser"></bean>
//id对边取,class全路径,制定调用类中的方法

package factory;
import ioc1.it.dao.userDao;
import ioc1.it.dao.userDaoImpl;
public class Factory {
    public userDao getUser(){
        return new userDaoImpl();
    }
}

        <bean id="factory" class="factory.Factory"></bean>
在非静态时,需要先创建个对象
        <bean id="userDao" factory-bean="factory" factory-method="getUser"></bean>og
调用对象,调用方法