workspace/.metadata/.plugins/org.eclipse.core.resources/.history/49/700d25d1ca6a0011194396142d5d2649

   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 && i < length; i++){
  15                         String ch = text.substring(i, i + 1);
  16
  17                         if (ptnAlnum.matcher(ch).matches()){
  18                                 if (status != 0){
  19                                         pos = i;
  20                                         status = 0;
  21                                 }
  22                         }
  23                         else if (ptnAscii.matcher(ch).matches()){
  24                                 if (status != 1){
  25                                         pos = i;
  26                                         status = 1;
  27                                 }
  28                         }
  29                         else {
  30                                 if (status != 2){
  31                                         pos = i;
  32                                         status = 2;
  33                                 }
  34                         }
  35                 }
  36                 return text.substring(0, pos);
  37         }
  38 }