code: private Map<String, Properties> parseDataSourceConfig(){  
          // 属性文件  
          Map<String, Properties> mapDataSource = new HashMap<String,Properties>(); 
          
  		String datasourceKey = MASTER_KEY;
  		Properties nodeProperties = parseNodeConfig(datasourceKey); 
  		mapDataSource.put(datasourceKey, nodeProperties);
  		
  		//解析同组下面的slave
  		int index = 1;
  		while(true){
  			datasourceKey = "slave" + index;
  			if(!ResourceUtils.containsProperty(datasourceKey + ".db.url") && !ResourceUtils.containsProperty(datasourceKey + ".db.jdbcUrl"))break;
  			nodeProperties = parseNodeConfig(datasourceKey); 
  			mapDataSource.put(datasourceKey, nodeProperties);
  			index++;
  		}
  		
          return mapDataSource;  
      }
docs: 功能说明：解析配置，得到数据源Map
  @return
  @throws IOException