Quickly filter string content

Public class stringfilterhelper {private int maxlength; private hashmap <string, string> filterstrs = new hashmap <string, string> (); /***** number of values to be filtered out during initialization */private string initstr (int n) {stringbuffer sb = new stringbuffer (); For (INT I = 0; I <n; I ++) {sb. append ('*');} return sb. tostring ();}/*** str-filtered string ** S-string to be filtered * to obtain the remaining unfiltered string */private string getnextstr (string STR, int start, int Slength) {If (START = 0) {STR = Str. substring (slength);} else if (start + slength <Str. length () {STR = Str. substring (start + slength);} return STR ;} /***** str-filtered string * s-string to be filtered * to obtain the filtered string */private stringbuffer getfilterstr (stringbuffer Sb, string STR, int start, string s) {If (start! = 0) {sb. append (Str. substring (0, start);} sb. append (filterstrs. get (s); return sb;}/***** str-filtered string * filter, and combine the filtered string */Public String filter (string Str) {stringbuffer resultstr = new stringbuffer (); For (INT start = 0; Start <Str. length (); Start ++) {for (INT end = start + 1; end <= Str. length () & End <= start + maxlength; end ++) {string S = Str. substring (START, end); int slength = S. length (); If (filterstrs. containskey (s) {resultstr = getfilterstr (resultstr, STR, start, S); STR = getnextstr (STR, start, slength); Start = 0; end = start ;}} resultstr. append (STR); Return resultstr. tostring ();} public void put (string key) {int keylength = key. length (); filterstrs. put (Key, initstr (keylength); If (keylength> This. maxlength) maxlength = keylength;}/*** filter string * @ Description: Mainly post content * @ method_name: filterstring * @ Param filterrole * @ Param filterstr * @ return: string * @ creation date: Apr 19,201 3 4:10:20 * @ version: v1.00 * @ Author: bluesky * @ update date: * @ update Author: bluesky */public static string filterstring (string filterrole, string filterstr) {stringfilterhelper T = new stringfilterhelper (); string [] S = filterrole. split (","); For (INT I = 0; I <S. length; I ++) {T. put (s [I]);} return T. filter (filterstr);} public static void main (string [] AGRs) {string filterrole = "TMD, tnnd, fuck,"; system. out. println (stringfilterhelper. filterstring (filterrole, "TMD, fuck, tnnd. fuck .. tmdtmdtmdtmd. ttnnd. tmdtnndtnndtnnd "));}}