--(c>=48 and c<=57)數字
--(c>= 65 and c<=90)大寫字母
--(c>=97 and c<=122)小寫字母
--判斷是否由漢字，大小寫字母組成
function Balance:GetStringA_Z_Chinese(str)
local ss = {}
local k = 1
while true do
if k > #str then
return true
end
local c = string.byte(str, k)
if not c then
return false
end
if c < 192 then
if (c >= 65 and c <= 90) or (c >= 97 and c <= 122) then
table.insert(ss, string.char(c))
else
return false
end
k = k + 1
elseif c < 224 then
k = k + 2
return false
elseif c < 240 then
if c >= 228 and c <= 233 then
local c1 = string.byte(str, k + 1)
local c2 = string.byte(str, k + 2)
if c1 and c2 then
local a1, a2, a3, a4 = 128, 191, 128, 191
if c == 228 then
a1 = 184
elseif c == 233 then
a2, a4 = 190, c1 ~= 190 and 191 or 165
end
if c1 >= a1 and c1 <= a2 and c2 >= a3 and c2 <= a4 then
table.insert(ss, string.char(c, c1, c2))
else
return false
end
else
return false
end
else
return false
end
k = k + 3
elseif c < 248 then
k = k + 4
return false
elseif c < 252 then
k = k + 5
return false
elseif c < 254 then
k = k + 6
return false
end
end
end