Spring技巧之如何动态读取配置文件

<!-- 如果要配置多个, 就要设置ignore-unresolvable ="true" -->
<context:property-placeholder location="classpath:extend/db.properties" ignore-unresolvable="true" />
<context:property-placeholder location="classpath:db.properties" ignore-unresolvable="true" />

// BeanFactoryPostProcessor.postProcessBeanFactory
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
    // 我们自己去读取指定的配置文件
    Properties prop = null ;
    try {
        prop = PropertiesLoaderUtils.loadAllProperties("extend/db.properties", Thread.currentThread().getContextClassLoader());
    } catch (IOException e) {
        e.printStackTrace();
    }
    if(null == prop){
        return;
    }
    // 注入到特定的Bean的特定属性中
    BeanDefinition beanDefinition = beanFactory.getBeanDefinition("dataSource_extend");
    beanDefinition.getPropertyValues().add("url", prop.getProperty("db.sd.url"));
    beanDefinition.getPropertyValues().add("driverClassName",prop.getProperty("db.sd.driverClassName"));
    beanDefinition.getPropertyValues().add("username", prop.getProperty("db.sd.username"));
    beanDefinition.getPropertyValues().add("password", prop.getProperty("db.sd.password"));   
    super.postProcessBeanFactory(beanFactory);
}

jedis.properties

InputStream is=JedisPoolUtils.class.getClassLoader().getResourceAsStream("jedis.properties");

Properteis pro=new Properties();

pro.load(is);