系统启动PropertyPlaceholderConfigurer加载配置到spring容器中

public class SystemProperties extends PropertyPlaceholderConfigurer {
protected Logger log = LoggerFactory.getLogger(this.getClass());

@Override
protected void processProperties( ConfigurableListableBeanFactory beanFactoryToProcess, Properties props) throws BeansException {
Properties result = new Properties();
if (PropertiesConfigContext.IsInited()){
result = PropertiesConfigContext.getSysproperties();
} else {
PropertiesConfigContext.initConfig();

Properties propbackup = new BackUpPropertiesLoader().getProperties();
CollectionUtils.mergePropertiesIntoMap(propbackup, result);

PropertiesConfigContext.SetConfigInitInfo(result);
}

super.processProperties(beanFactoryToProcess, result);
}
}