lua学习笔记13：查找并替换文件中关键字

写了一个小工具，拿出分享分享。

先说一下背景吧。

项目中为了重复利用图片资源，把json和图片都放在Resource/ui目录，但有一些图片，比如说道具，是在Resource/images/item下面，

所以，在CocosStudio中编辑完UI之后，需要把资源的相对路径改到item目录，因此就写了这个脚本。

--------------------------------------------------------------------
-- add by 寒风 on 2014/12/26
-- UI中用到了一个资源，路径不在ui下面
-- 此脚本用于矫正资源路径
--------------------------------------------------------------------

local function getFile(file_name)
  local f,err = io.open(file_name, 'r')
  if not f then
  	print(err)
  	return nil
  end
  local string = f:read("*all")
  f:close()
  return string
end  

local function replace(file_name, content, src, dst)
	content, count = string.gsub(content, src, dst)
	print(file_name, src, count)
	return content
end

local function writeFile(file_name,string)
 local f = assert(io.open(file_name, 'w+'))
 f:write(string)
 f:close()
end  

local function main()
	local configs = {
		{"\"path\": \"1jijyd.png\"",			"\"path\": \"../images/item/1jijyd.png\""},
		{"\"path\": \"chujishengshi.png\"",		"\"path\": \"../images/ship/chujishengshi.png\""},
		{"\"path\": \"fanpaidazuozhan_0.png\"",		"\"path\": \"../images/ui/tiaozhan/fanpaidazuozhan_0.png\""},
		{"\"path\": \"guishouzhaofan_0.png\"",		"\"path\": \"../images/ui/tiaozhan/guishouzhaofan_0.png\""},
		{"\"path\": \"Icon_chongwujinghua.png\"",	"\"path\": \"../images/item/Icon_chongwujinghua.png\""},
		{"\"path\": \"mofjt.png\"",			"\"path\": \"../images/item/mofjt.png\""},
		{"\"path\": \"Icon_skill_ATK.png\"",		"\"path\": \"../images/ui/feichuanjineng/Icon_skill_ATK.png\""},
		{"\"path\": \"Icon_skill_crystal2.png\"",	"\"path\": \"../images/ui/feichuanjineng/Icon_skill_crystal2.png\""},
		{"\"path\": \"Icon_skill_fire.png\"",		"\"path\": \"../images/ui/feichuanjineng/Icon_skill_fire.png\""},
		{"\"path\": \"juedizhizhan_0.png\"",		"\"path\": \"../images/ui/tiaozhan/juedizhizhan_0.png\""},
		{"\"path\": \"miaomiaoweisi1.png\"",		"\"path\": \"../images/ui/touxiang/miaomiaoweisi1.png\""},
		{"\"path\": \"miaomiaoweisi2.png\"",		"\"path\": \"../images/ui/touxiang/miaomiaoweisi2.png\""},
		{"\"path\": \"miaomiaoweisi3.png\"",		"\"path\": \"../images/ui/touxiang/miaomiaoweisi3.png\""},
		{"\"path\": \"miaomiaozhanjian1.png\"",		"\"path\": \"../images/ui/touxiang/miaomiaozhanjian1.png\""},
		{"\"path\": \"monengshizhu1.png\"",		"\"path\": \"../images/ui/touxiang/monengshizhu1.png\""},
		{"\"path\": \"shandiandun1.png\"",		"\"path\": \"../images/ui/touxiang/shandiandun1.png\""},
	}
	local file_names = {
		"ui/bangzhu_UI_1.json",
		"ui/bangzhu_shangdian_UI_1.json",
		"ui/bangzhu_mojing_UI_1.json",
		"ui/bangzhu_meiritiaozhan_UI_1.json",
		"ui/bangzhu_emota_UI_1.json",
		"ui/bangzhu_chongwupeiyang_UI_1.json",
		"ui/bangzhu_chongwu_UI_1.json",
	}
	for k, file_name in pairs(file_names) do
		local content = getFile(file_name)
		if content then
			for k, configItem in pairs(configs) do
				content = replace(file_name, content, configItem[1], configItem[2])
			end
			writeFile(file_name, content)
		end
	end
end
main()

file_names中保存的是需要修改路径的json文件；

configs保存的是需要修改资源的原始路径和目标路径。