string trim功能
1: function string_trim(s)
2: if s == nil then
3: return
4: end
5:
6: return (string.gsub(s, "^%s*(.-)%s*$", "%1"))
7: end
检查某个字符串是不是指向合法目录。
1: function check_directory(s)
2: s = string_trim(s)
3: if not s or s == "" then
4: return false
5: end
6:
7: if string.sub(s, -1, -1) == [[\]]then
8: s = string.sub(s, 1, -2)
9: end
10:
11: local attr = lfs.attributes (s)
12: if (attr and attr.mode == "directory") then
13: return true
14: end
15:
16: return false
17: end
对于文件操作，最好先备份一下原来文件：
1: local str = "copy \"" .. Folder .. '\\log.db' .. "\" \"" .. Folder .. '\\log.db' .. "." .. os.time() .. "\" /v /y"
2:
3: os.execute(str)
对于sqlite的操作，注意使用了一个自增myid作为key。
1: Db1 = sqlitelua.open(upFolder .. '\\mainlog.db')
2:
3: Db1:exec('CREATE TABLE newfiles(myid INTEGER PRIMARY KEY AUTOINCREMENT, myname, myfolder)')
4:
5: local stmt1 = Db1:prepare[[ INSERT INTO newfiles VALUES (:myid, :myname, :myfolded) ]]
6:
7: stmt1:bind_names{myname = new_name, myfolder = currentFolder}
8:
9: stmt1:step()
10: stmt1:reset()
11: stmt1:finalize()