参考文档：

　　《Programming Erlang》，第13章：Programming with Files

　　官方文档， 、和。

示例：

%% 文件读写示例-module(file_example).-export([write/2, read/1]).%% --------------------%% 写入文件%% write(Content, FileName) -> {ok, Content}%% Content = string()%% FileName = string()%% --------------------write(Content, FileName) when is_list(Content); is_list(FileName) ->    FileAbsolutePath = lists:append([get_local_path(), "/", FileName]),    {ok, IoDevice} = file:open(FileAbsolutePath, [append]),    io:format(IoDevice, "~s", [Content]),    file:close(IoDevice),    {ok, Content}.%% --------------------%% 读取文件%% read(FileName) -> binary()%% FileName = string()%% --------------------read(FileName) when is_list(FileName) ->    {ok, Content} = file:read_file(FileName),    Content.get_local_path() ->    filename:dirname(code:which(?MODULE)).