将对象注入到Spring容器并实现依赖注入
public class UserDao {
@Resource
AccountService accountService;
public void print(){
System.out.println(accountService);
}
}
比如有以上这个类，实现将new UserDao（）放入Spring容器中（放入工作由DefaultListableBeanFactory完成），并且AccountService会自动注入（注入工作由AutowireCapableBeanFactory完成）。
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
@RunWith(SpringJUnit4ClassRunner.class)
public class test{
@Autowired
private AutowireCapableBeanFactory beanFactory;
@Autowired
DefaultListableBeanFactory defaultListableBeanFactory;
public void testmenualInject(){
UserDao userDao=new UserDao();
//将new出的对象放入Spring容器中
defaultListableBeanFactory.registerSingleton("userDao",userDao);
//自动注入依赖
beanFactory.autowireBean(userDao);
userDao.print();
//判断new的对象和从容器中拿出的对象是否一致
System.out.println(defaultListableBeanFactory.getBean("userDao").equals(userDao));
}
}
原文地址：https://www.cnblogs.com/windpoplar/p/10921831.html