这个可以trim掉以下字符
- ” ” (ASCII 32 (0×20)), an ordinary space空格.
- “/t” (ASCII 9 (0×09)), a tab.
- “/n” (ASCII 10 (0×0A)), a new line (line feed)换行.
- “/r” (ASCII 13 (0×0D)), a carriage return.
- “/0″ (ASCII 0 (0×00)), the NUL-byte.
- “/x0B” (ASCII 11 (0×0B)), a vertical tab.
个人感觉不错,收藏了