lua 读写文件_lua文件系统写入table-优快云博客

本文详细介绍了使用Lua语言进行文件读写的多种方法，包括不同模式的打开方式、基本的读写操作以及如何处理表格数据。提供了丰富的代码示例，帮助读者快速掌握Lua中的文件操作技巧。

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官方参考文档：http://www.lua.org/manual/5.1/

0.读写种类

r 读取模式
w 写入模式(覆盖现有内容)
a 附加模式(附加在现有内容之后)

b 二进制模式
r+ 读取更新模式(现有数据保留)
w+ 写入更新模式(现有数据擦除)
a+ 附加更新模式(现有数据保留，只在文件末尾附加)

1.一些函数

assert(file); 找不到文件抛出异常

2.读写文件

path = "/Users/admin/Desktop/file.rtf"

function FileReadSave()
local file = io.open(path, "r");
assert(file);
local data = file:read("*a"); -- 读取所有内容
print(data)

for l in file:lines() do   --一行一行读取
  print(l)
end

file:close();

file = io.open(path, "w");
assert(file);
file:write("dataa的速度a11\n"); -- \n 一行一行写进去
file:write("dataaa11\n");
file:write("dataaa11\n");
file:write("dataaa11\n");
file:close();
end

3.读写 table

参考

cha = {};
cha[1] =
{
basic =
{
  Name = "农民",
  cha_type = 1,
},
combat =
{
acquire = 600.00,
basic_def = 10,
},
};

function SaveTableContent(file, obj)
local szType = type(obj);
print(szType);

if szType == "number" then
file:write(obj);
elseif szType == "string" then
file:write(string.format("%q", obj));
elseif szType == "table" then --把table的内容格式化写入文件
file:write("{\n");

for i, v in pairs(obj) do
file:write("[");
SaveTableContent(file, i);
file:write("]=\n");

SaveTableContent(file, v);
file:write(", \n");
end

file:write("}\n");
else
  error("can't serialize a "..szType);
end
end

function SaveTable()
local file = io.open(path, "w");
assert(file);
file:write("cha = {}\n");
file:write("cha[1] = \n");

SaveTableContent(file, cha[1]);

file:write("}\n");
file:close();
end
SaveTable();

--I/O库为文件操作提供2个里一个输入库和一个输出库io.read()

--io.write() 该函数将所有参数按照顺序写到当前输出文件中
FILE_NAME = 'd:/2013-08-08.txt'
FILE_NAME2 = 'd:/lua1.txt'

function write()
  io.write('hello ', 'world')
end

--write()

--io.read() 读取当前文件的内容 "*all" "*line" "*number" number
--[[for count = 1,math.huge do
    local line = io.read("*line")  --如果不传参数，缺省值也是"*line"
    if line == nil then
        break
    end
    io.write(string.format("%6d  ",count),line,"\n")
end--]]

--读取指定文件
function getFile(file_name)
  local f = assert(io.open(file_name, 'r'))
  local string = f:read("*all")
  f:close()
  return string
end

-- local lines,rest = f:read(BUFSIZE,"*line")
function getFileLine(file_name)
  local BUFSIZE = 84012
  local f = assert(io.open(file_name, 'r'))
  local lines,rest = f:read(BUFSIZE, "*line")
  f:close()
  return lines , rest
end

--字符串写入
function writeFile(file_name,string)
 local f = assert(io.open(file_name, 'w'))
 f:write(string)
 f:close()
end

writeFile(FILE_NAME2, getFile(FILE_NAME))

--控制台写入字符串到文件中
function writeFile2(file_name)
 local f = assert(io.open(file_name, 'w'))
 local string = io.read()
 f:write(string)
 f:close()
end
io.write()
writeFile2(FILE_NAME2)

http://blog.youkuaiyun.com/renzhe20092584/article/details/27239613

http://blog.163.com/liwei1987821@126/blog/static/17266492820131011111035550/