String regular match Filtering

1. Filter blank characters in the string. You can remove blank characters such as tab and press Enter.

Str. replaceall ("\ s + ","");

2. Filter Chinese Punctuation Marks

STR = Str. replaceall ("(? [^ A-zA-Z0-9 \ u4e00-\ u9fa5] "," ");

3. Remove invalid file characters from Linux

Public static string cleanfilename (string badfilename) {final int [] illegalchars = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 34, 42, 47, 58, 60, 62, 63, 92,124}; stringbuilder cleanname = new stringbuilder (); For (INT I = 0; I <badfilename. length (); I ++) {int c = (INT) badfilename. charat (I); If (arrays. binarysearch (illegalchars, c) <0) {cleanname. append (char) c) ;}} return cleanname. tostring ();}