private static int readFeaFile(File feaFile) throws Exception
	{
		BufferedReader feaIn= new BufferedReader(new FileReader(feaFile));
		String temp="";
		int count=0;
		while((temp=feaIn.readLine())!=null)
		{
			String[] split=temp.split(ConstantClass.delimiter);
			if(split.length!=2)
				continue;
			if(table.containsKey(split[0]))
				continue;
			table.put(split[0],	Integer.valueOf(split[1]));
			count++;
		}
		feaIn.close();
		return count>feaNum?count:feaNum;
	}