汉字:[0x4e00,0x9fa5](或十进制[19968,40869])数字:[0x30,0x39](或十进制[48, 57])小写字母:[0x61,0x7a](或十进制[97, 122])大写字母:[0x41,0x5a](或十进制[65, 90])
[0x4e00,0x9fa5]
[19968,40869]
[0x30,0x39]
[48, 57]
[0x61,0x7a]
[97, 122]
[0x41,0x5a]
[65, 90]