workspace/.metadata/.plugins/org.eclipse.core.resources/.history/e6/205b432bcd6a0011194396142d5d2649

   1 package com.yuji.tdb.utility;
   2
   3 import java.util.regex.Pattern;
   4
   5 public class StringUtil {
   6         private static Pattern ptnAlnum = Pattern.compile("[a-zA-Z0-9]");
   7         private static Pattern ptnAscii = Pattern.compile("\\p{ASCII}");
   8
   9         public static String parseSubstring(String text, int length){
  10                 int len = text.length();
  11                 int status = -1;
  12                 int pos = 0;
  13
  14                 for (int i = 0; i < len + 1 && i < length + 1; i++){
  15                         if (i >= len){
  16                                 pos = i;
  17                                 break;
  18                         }
  19                         String ch = text.substring(i, i + 1);
  20
  21                         if (ptnAlnum.matcher(ch).matches()){
  22                                 if (status != 0){
  23                                         pos = i;
  24                                         status = 0;
  25                                 }
  26                         }
  27                         else if (ptnAscii.matcher(ch).matches()){
  28                                 if (status != 1){
  29                                         pos = i;
  30                                         status = 1;
  31                                 }
  32                         }
  33                         else {
  34                                 pos = i;
  35                                 status = 2;
  36                         }
  37                 }
  38                 return text.substring(0, pos);
  39         }
  40 }