public final static String filterSQLInjection(String s) {      if (s == null || "".equals(s)) {          return "";      }      try {          s = s.trim().replaceAll("</?[s,S][c,C][r,R][i,I][p,P][t,T]>?", "");//script          s = s.trim().replaceAll("[a,A][l,L][e,E][r,R][t,T]\\(", "").replace("\"", "");// alert          s = s.trim().replace("\\.swf", "").replaceAll("\\.htc", "");          s = s.trim().replace("\\.php\\b", "").replaceAll("\\.asp\\b", "");          s = s.trim().replace("document\\.", "").replaceAll("[e,E][v,V][a,A][l,L]\\(", "");          s = s.trim().replaceAll("'", "").replaceAll(">", "");          s = s.trim().replaceAll("<", "").replaceAll("=", "");          s = s.trim().replaceAll(" [o,O][r,R]", "");          s = s.trim().replaceAll("etc/", "").replaceAll("cat ", "");          s = s.trim().replaceAll("/passwd ", "");          s = s.trim().replaceAll("sleep\\(", "").replaceAll("limit ", "").replaceAll("LIMIT ", "");          s = s.trim().replaceAll("[d,D][e,E][l,L][e,E][t,T][e,E] ", "");// delete          s = s.trim().replaceAll("[s,S][e,E][l,L][e,E][c,C][t,T] ", "");// select;          s = s.trim().replaceAll("[u,U][p,P][d,D][a,A][t,T][e,E] ", "");// update          s = s.trim().replaceAll("[d,D][e,E][l,L][a,A][y,Y] ", "").replaceAll("waitfor ", "");          s = s.trim().replaceAll("print\\(", "").replaceAll("md5\\(", "");          s = s.trim().replaceAll("cookie\\(", "").replaceAll("send\\(", "");          s = s.trim().replaceAll("response\\.", "").replaceAll("write\\(", "")                  .replaceAll("&", "");      } catch (Exception e) {          e.printStackTrace();          return "";      }      return s;  }