lua序列化table表到文件中

先上代码

function luautil.serialize(t, sort_parent, sort_child)
	local mark={}
	local assign={}
	
	local function ser_table(tbl,parent)
		mark[tbl]=parent
		local tmp={}
		local sortList = {};
		for k,v in pairs(tbl) do
			sortList[#sortList + 1] = {key=k, value=v};
		end

		if tostring(parent) == "ret" then
			if sort_parent then table.sort(sortList, sort_parent); end
		else
			if sort_child then table.sort(sortList, sort_child); end
		end

		for i = 1, #sortList do
			local info = sortList[i];
			local k = info.key;
			local v = info.value;
			local key= type(k)=="number" and "["..k.."]" or k;
			if type(v)=="table" then
				local dotkey= parent..(type(k)=="number" and key or "."..key)
				if mark[v] then
					table.insert(assign,dotkey.."="..mark[v])
				else
					table.insert(tmp, "\n"..key.."="..ser_table(v,dotkey))
				end
			else
				if type(v) == "string" then
					table.insert(tmp, key..'="'..v..'"');
				else
					table.insert(tmp, key.."="..tostring(v));
				end
			end
		end

		return "{"..table.concat(tmp,",").."}";
	end
 
	return "do local ret=\n\n"..ser_table(t,"ret")..table.concat(assign," ").."\n\n return ret end"
end

function luautil.split(str, delimiter)
    if (delimiter=='') then return false end
    local pos,arr = 0, {}
    -- for each divider found
    for st,sp in function() return string.find(str, delimiter, pos, true) end do
        table.insert(arr, string.sub(str, pos, st - 1))
        pos = sp + 1
    end
    table.insert(arr, string.sub(str, pos))
    return arr
end

function luautil.writefile(str, file)
	os.remove(file);
	local file=io.open(file,"ab");

	local len = string.len(str);
	local tbl = luautil.split(str, "\n");
	for i = 1, #tbl do
		file:write(tbl[i].."\n");
	end
	file:close();
end

1、基础功能抄自云风早期的代码。 这里稍微添加了排序功能，可以传入排序函数，否则表是按哈希排序的，输出后会乱掉。

2、添加了writefile函数，因为lua的文件写入有最大字节数限制，所以一行一行写入。