[HELP] I couldn't trim() 1 japanese String (charset UTF-8)

[Pham Anh Tuan]

Matsuhashi, thank you very very much, my problem is solved :")

----- Original Message ----- From: <[EMAIL PROTECTED]>

To: "Struts Users Mailing List" <user@struts.apache.org>
Sent: Tuesday, June 21, 2005 7:02 PM
Subject: Re: [HELP] I couldn't trim() 1 japanese String (charset UTF-8)

Do you want to remove leading/trailing double-bytes-whitespace chars?

I mean the double-bytes-whitespace to be a UNICODE char of \u3000.

The java.lang.String#trim() does not see the \u3000 as a whitespace which
it should chop off.

To remove the \u3000 char, I think you would need fair amount of custom
code. Following dirty code may suggest you something.


---------------------------------------------------------------
class DoubleBytesWhitespaceTrimmer {

   static char doubleBytesWhitespace = '\u3000' ;

   public static String trim(String s) {
     String leadingTrimmed = trimLeadingChar(s , doubleBytesWhitespace);
     String rev = reverse(leadingTrimmed);
       return reverse(trimLeadingChar(rev , doubleBytesWhitespace));
   }

   private static String trimLeadingChar(String s , char c) {
     char[] chars = s.toCharArray();
       StringBuffer b = new StringBuffer();
       int index;
       for (index = 0; index < chars.length; index++) {
           if (chars[index] == c)
                 ;
           else
                 break;
       }
       for ( ;index < chars.length; index++) {
           b.append(chars[index]);
       }
       return b.toString();
   }

   private static String reverse(String s) {
     char[] chars = s.toCharArray();
     StringBuffer b = new StringBuffer();
     for (int x = chars.length - 1; x >= 0 ; x--) {
           b.append(chars[x]);
     }
     return b.toString();
   }

   public static void main(String[] args) {
       StringBuffer b = new StringBuffer();
       b.append(doubleBytesWhitespace);
       b.append("foo");
       b.append(doubleBytesWhitespace);
       System.out.println("source : [" + b.toString() + "]");
       String trimmed= DoubleBytesWhitespaceTrimmer.trim(b.toString());
       System.out.println("trimed : [" + trimmed + "]");
       System.out.println("\"foo\".equals(\"" + trimmed + "\") ? " +
"foo".equals(trimmed));
   }
}
-----------------------------------------------


This gives following output for me.
-----------------------------------------------
source : [　foo　]
trimed : [foo]
"foo".equals("foo") ? true







                     "Pham Anh Tuan"

<[EMAIL PROTECTED] 宛先: "Struts Users Mailing List" <user@struts.apache.org>

                     rp.jp>                   cc:

件名: [HELP] I couldn't trim() 1 japanese String (charset UTF-8)

                     2005/06/21 20:03
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                     Mailing List" へ
                     返信してください






Hi all,

I got 1 problem when I trying to eliminate spaces at ride side and left
side of 1 japanese String.

In mySQL I set UTF-8 for both database and my Jsp pages. But in Action, I
can't not trim() japanese string, so, when I insert that string to
database, spaces are exist.

Plz help me solve this problem! :(

Thanks for ur reading.

Pham





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