http://koteitan.seesaa.net/article/47717182.html
http://icu-project.org/download/
http://www7a.biglobe.ne.jp/~java-master/samples/string/index.html
!ICU4J
Java で全角半角変換やひらがなカタカナ変換を行うライブラリ
使い方( 注意:リンク先丸パクリです)
import com.ibm.icu.text.*;
import com.ibm.icu.util.*;
import java.util.*;
public class Main {
public static void main(String args[])
{
String data = "AaAアいろはアイウエイウエ";
Transliterator tr1 = Transliterator.getInstance("Fullwidth-Halfwidth");
Transliterator tr2 = Transliterator.getInstance("Katakana-Hiragana");
Transliterator tr3 = Transliterator.getInstance("Hiragana-Latin");
System.out.println(tr1.transliterate(data));
System.out.println(tr2.transliterate(data));
System.out.println(tr3.transliterate(data));
DateFormat df = new SimpleDateFormat("Gy年M月d日", new DateFormatSymbols(new JapaneseCalendar(), Locale.JAPANESE));
df.setCalendar(new JapaneseCalendar());
System.out.println(df.format(new Date()));
}
}
日本語で使いそうなID
* Fullwidth-Halfwidth
* Halfwidth-Fullwidth
* Hiragana-Katakana
* Hiragana-Latin
* Katakana-Hiragana
* Katakana-Latin
* Latin-Hiragana
* Latin-Katakana
* Any-Hiragana
* Any-Katakana
!マッピングテーブルを作る方法
リンク先丸パクリ
package samples.string.japanese;
public class ZenkakuKatakanaToHankakuKatakana {
private static final char[] ZENKAKU_KATAKANA = { 'ァ', 'ア', 'ィ', 'イ', 'ゥ',
'ウ', 'ェ', 'エ', 'ォ', 'オ', 'カ', 'ガ', 'キ', 'ギ', 'ク', 'グ', 'ケ', 'ゲ',
'コ', 'ゴ', 'サ', 'ザ', 'シ', 'ジ', 'ス', 'ズ', 'セ', 'ゼ', 'ソ', 'ゾ', 'タ',
'ダ', 'チ', 'ヂ', 'ッ', 'ツ', 'ヅ', 'テ', 'デ', 'ト', 'ド', 'ナ', 'ニ', 'ヌ',
'ネ', 'ノ', 'ハ', 'バ', 'パ', 'ヒ', 'ビ', 'ピ', 'フ', 'ブ', 'プ', 'ヘ', 'ベ',
'ペ', 'ホ', 'ボ', 'ポ', 'マ', 'ミ', 'ム', 'メ', 'モ', 'ャ', 'ヤ', 'ュ', 'ユ',
'ョ', 'ヨ', 'ラ', 'リ', 'ル', 'レ', 'ロ', 'ヮ', 'ワ', 'ヰ', 'ヱ', 'ヲ', 'ン',
'ヴ', 'ヵ', 'ヶ' };
private static final String[] HANKAKU_KATAKANA = { "ァ", "ア", "ィ", "イ", "ゥ",
"ウ", "ェ", "エ", "ォ", "オ", "カ", "ガ", "キ", "ギ", "ク", "グ", "ケ",
"ゲ", "コ", "ゴ", "サ", "ザ", "シ", "ジ", "ス", "ズ", "セ", "ゼ", "ソ",
"ゾ", "タ", "ダ", "チ", "ヂ", "ッ", "ツ", "ヅ", "テ", "デ", "ト", "ド",
"ナ", "ニ", "ヌ", "ネ", "ノ", "ハ", "バ", "パ", "ヒ", "ビ", "ピ", "フ",
"ブ", "プ", "ヘ", "ベ", "ペ", "ホ", "ボ", "ポ", "マ", "ミ", "ム", "メ",
"モ", "ャ", "ヤ", "ュ", "ユ", "ョ", "ヨ", "ラ", "リ", "ル", "レ", "ロ", "ワ",
"ワ", "イ", "エ", "ヲ", "ン", "ヴ", "カ", "ケ" };
private static final char ZENKAKU_KATAKANA_FIRST_CHAR = ZENKAKU_KATAKANA[0];
private static final char ZENKAKU_KATAKANA_LAST_CHAR = ZENKAKU_KATAKANA[ZENKAKU_KATAKANA.length - 1];
public static String zenkakuKatakanaToHankakuKatakana(char c) {
if (c >= ZENKAKU_KATAKANA_FIRST_CHAR && c <= ZENKAKU_KATAKANA_LAST_CHAR) {
return HANKAKU_KATAKANA[c - ZENKAKU_KATAKANA_FIRST_CHAR];
} else {
return String.valueOf(c);
}
}
public static String zenkakuKatakanaToHankakuKatakana(String s) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < s.length(); i++) {
char originalChar = s.charAt(i);
String convertedChar = zenkakuKatakanaToHankakuKatakana(originalChar);
sb.append(convertedChar);
}
return sb.toString();
}
public static void main(String[] args) {
System.out.println(zenkakuKatakanaToHankakuKatakana("ジャヴァプログラミング"));
}
}
ハッシュテーブルだと、「ー」とかも対象とするときとかに応用が利くので
マッピングテーブルはハッシュテーブルにしても良いかもしれない。
{{category2 プログラミング言語,Java}}