Java知识点16 Spring创建IOC容器的两种方式

1、直接得到 IOC 容器对象

 ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");

封装起来：

 1 public class ApplicationContextUtil {
 2     private static ApplicationContext applicationContext = null;
 3     public ApplicationContextUtil(){
 4         //无参构造器，可以不用写
 5     }
 6
 7     static{
 8         applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
 9     }
10
11     public ApplicationContext getApplicationContext() {
12         return applicationContext;
13     }

使用时，直接用类名.方法调用即可：ApplicationContextUtil.ApplicationContextUtil();

2、通过工厂类得到 IOC 容器创建的对象

1 Resource resource = new ClassPathResource("applicationContext.xml");
2 BeanFactory factory = new XmlBeanFactory(resource);

封装起来：

 1 public class ApplicationContextFactoryUtil {
 2     private static BeanFactory beanFactory = null;
 3     public ApplicationContextFactoryUtil(){
 4
 5     }
 6
 7     static{
 8         Resource resource = new ClassPathResource("applicationContext.xml");
 9         beanFactory = new XmlBeanFactory(resource);
10     }
11
12     public BeanFactory getBeanFactory() {
13         return beanFactory;
14     }
15 }

使用时，直接用类名.方法调用即可：ApplicationContextFactoryUti.getBeanFactory();

原文地址：https://www.cnblogs.com/dshore123/p/11682126.html