public static BufferedReader getReader(File file, Charset charset) throws IORuntimeException {
		return IoUtil.getReader(getInputStream(file), charset);
	}
public static BufferedReader getReader ( File file , Charset charset ) throws IORuntimeException { return IoUtil . getReader ( getInputStream ( file ) , charset ) ; }
获得一个文件读取器

@param file 文件
@param charset 字符集
@return BufferedReader对象
@throws IORuntimeException IO异常