fn_flag = string.find(filename, "\\")if fn_flag thendest_filename = string.match(filename, ".+\\([^\\]*%.%w+)$")endfn_flag = string.find(filename, "/")if fn_flag thendest_filename = string.match(filename, ".+/([^/]*%.%w+)$")end更多详见 http://blog.csdn.net/bull_liu/article/details/8726089
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