spring读取配置文件，且获取bean实例

Posted 2021-11-05 hkmblogs

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;


/**
* 实例化容器测试类
* */
public class Test {
public static void main(String[] args){
//方式一：在CLASSPATH路径下获取XMLBeanFactory实例
ClassPathResource res = new ClassPathResource("container.xml");
XmlBeanFactory factory = new XmlBeanFactory(res);
HelloBean hellobean = (HelloBean)factory.getBean("helloBean");
hellobean.sayHelloWorld();

//方式二：指定绝对路径建ApplicatinContext实例
FileSystemXmlApplicationContext context = new FileSystemXmlApplicationContext("D:\\My_Struts_Cvs8\\springioc\\src\\container.xml");
BeanFactory factory2 = (BeanFactory) context;
HelloBean hellobean2 = (HelloBean)factory2.getBean("helloBean");
hellobean2.sayHelloWorld();

//方式三：通过ClassPathXmlApplicationContext创建BeanFactory实例
ClassPathXmlApplicationContext context3 = new ClassPathXmlApplicationContext("container.xml");
BeanFactory factory3 = (BeanFactory) context3;
HelloBean hellobean3 = (HelloBean)factory3.getBean("helloBean");
hellobean3.sayHelloWorld();
}