驽马十驾

直接上代码：

//1.获取context:ConfigurableApplicationContext.其中applicationContext 可以是注入的
ApplicationContext applicationContext = getApplicationContext();  
ConfigurableApplicationContext configFcaotry = applicationContext instanceof 
        ConfigurableApplicationContext ? ((ConfigurableApplicationContext) applicationContext) : null;


//2.获取factory:DefaultListableBeanFactory
ConfigurableListableBeanFactory beanFactory =configFcaotry.getBeanFactory();  
DefaultListableBeanFactory listFacotry = beanFactory instanceof 
        DefaultListableBeanFactory ? ((DefaultListableBeanFactory) beanFactory) : null;  
  

//3.动态构建bean：BeanDefinitionBuilder
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(DataSource.class)
        .addPropertyValue("password", oriPwd + "@123");  
AbstractBeanDefinition beanDefinition = builder.getBeanDefinition();  
defaultListableBeanFactory.registerBeanDefinition("datasource",beanDefinition);