方式1: 安裝icu4

官方Github

https://github.com/unicode-org/icu

import com.ibm.icu.text.Transliterator;?全角轉換半角 Transliterator literator1 = Transliterator.getInstance("Fullwidth-Halfwidth"); literator1.transliterate("カナ"); // ｶﾅ?半角轉換全角 Transliterator literator2 = Transliterator.getInstance("Halfwidth-Fullwidth"); literator2.transliterate("ｶﾅ"); // カナ?平假名轉換片假名 Transliterator literator4 = Transliterator.getInstance("Hiragana-Katakana"); literator4.transliterate("なし"); // ナシ?片假名轉換平假名 Transliterator literator3 = Transliterator.getInstance("Katakana-Hiragana"); literator3.transliterate("カナ"); // かな

依賴

<dependency><groupId>com.ibm.icu</groupId><artifactId>icu4j</artifactId><!--此版本過時,Maven倉庫獲取最新版本--><version>3.4.4</version> </dependency>

方式2

參考 https://github.com/shogo4405/KanaXS
以下js代碼均摘錄于KanaXS中,該項目中還包含Java和C#的轉換

2.1 全角英數字を半角英數字に変換します

/*** 全角英數字を半角英數字に変換します。* @example* "ａｂｃＡＢＣ１２３".toHankakuCase(); // abcABC123* @return {String}*/ String.prototype.toHankakuCase = function() {var c, i = this.length, a = [];while(i--){c = a[i] = this.charCodeAt(i);switch(true){//　【！】～【～】の範囲case (0xFF01 <= c && c <= 0xFF5E):a[i] -= 0xFEE0;break;// 全角スペースcase (c == 0x3000):a[i] = 0x0020;break;};};return String.fromCharCode.apply(null, a); };

2.2 全角のカタカナを半角のカタカナに変換します

/*** 全角のカタカナを半角のカタカナに変換します。* @example* "アイウエオ".toHankanaCase(); // ｱｲｳｴｵ* @return */ String.prototype.toHankanaCase = function() {var i, f, c, a = [], m = String.prototype.toHankanaCase.MAPPING;for(i = 0, f = this.length;i < f;){c = this.charCodeAt(i++);switch(true){case (c in m):a.push(m[c]);break;case (0x30AB <= c && c <= 0x30C9):a.push(m[c - 1], 0xFF9E);break;case (0x30CF <= c && c <= 0x30DD):a.push(m[c - c % 3], [0xFF9E,0xFF9F][c % 3 - 1]);break;default:a.push(c);break;};};// 那個日本人Github中的代碼有bug,當全角片假名為ジャ、ジュ、ジョ等假名時ャ,ュ,ョ無法轉換為半角片假名// 暫且添加replaceAll("ャ", "ｬ").replaceAll("ュ", "ｭ").replaceAll("ョ", "ｮ") 來應付需求return String.fromCharCode.apply(null, a).replaceAll("ャ", "ｬ").replaceAll("ュ", "ｭ").replaceAll("ョ", "ｮ"); };String.prototype.toHankanaCase.MAPPING = {0x30A1:0xFF67,0x30A3:0xFF68,0x30A5:0xFF69,0x30A7:0xFF6A,0x30A9:0xFF6B,0x30FC:0xFF70,0x30A2:0xFF71,0x30A4:0xFF72,0x30A6:0xFF73,0x30A8:0xFF74,0x30AA:0xFF75,0x30AB:0xFF76,0x30AD:0xFF77,0x30AF:0xFF78,0x30B1:0xFF79,0x30B3:0xFF7A,0x30B5:0xFF7B,0x30B7:0xFF7C,0x30B9:0xFF7D,0x30BB:0xFF7E,0x30BD:0xFF7F,0x30BF:0xFF80,0x30C1:0xFF81,0x30C4:0xFF82,0x30C6:0xFF83,0x30C8:0xFF84,0x30CA:0xFF85,0x30CB:0xFF86,0x30CC:0xFF87,0x30CD:0xFF88,0x30CE:0xFF89,0x30CF:0xFF8A,0x30D2:0xFF8B,0x30D5:0xFF8C,0x30D8:0xFF8D,0x30DB:0xFF8E,0x30DE:0xFF8F,0x30DF:0xFF90,0x30E0:0xFF91,0x30E1:0xFF92,0x30E2:0xFF93,0x30E4:0xFF94,0x30E6:0xFF95,0x30E8:0xFF96,0x30E9:0xFF97,0x30EA:0xFF98,0x30EB:0xFF99,0x30EC:0xFF9A,0x30ED:0xFF9B,0x30EF:0xFF9C,0x30F2:0xFF66,0x30F3:0xFF9D,0x30C3:0xFF6F };

2.3 全角カタカナを全角ひらがに変換します

/*** 全角カタカナを全角ひらがに変換します。* @example* "アイウエオ".toHiraganaCase(); // あいうえお* @return {String}*/ String.prototype.toHiraganaCase = function() {var c, i = this.length, a = [];while(i--){c = this.charCodeAt(i);a[i] = (0x30A1 <= c && c <= 0x30F6) ? c - 0x0060 : c;};return String.fromCharCode.apply(null, a); };

2.4 全角ひらがなを全角カタカナに変換します。

/*** 全角ひらがなを全角カタカナに変換します。* @example* "あいうえお".toKatakanaCase(); // アイウエオ* @return {String}*/ String.prototype.toKatakanaCase = function() {var c, i = this.length, a = [];while(i--){c = this.charCodeAt(i);a[i] = (0x3041 <= c && c <= 0x3096) ? c + 0x0060 : c;};return String.fromCharCode.apply(null, a); };

2.5 半角英數字を全角英數字に変換します。

/*** 半角英數字を全角英數字に変換します。* @example* "abcABC123".toZenkakuCase(); // ａｂｃＡＢＣ１２３* @return {String}*/ String.prototype.toZenkakuCase = function() {var c, i = this.length, a = [];while(i--){c = a[i] = this.charCodeAt(i);switch(true){case (c <= 0x007E && 0x0021 <= c):a[i] += 0xFEE0;break;case (c == 0x0020):a[i] = 0x3000;break;};};return String.fromCharCode.apply(null, a); };

2.6 半角のカタカナを全角のカタカナに変換します。

/*** 半角のカタカナを全角のカタカナに変換します。* @example* "ｱｲｳｴｵ".toZenkanaCase(); // アイウエオ* @return {String}*/ String.prototype.toZenkanaCase = function() {var i, f, c, a = [], m = String.prototype.toZenkanaCase.MAPPING;for(i = 0, f = this.length;i < f; i++){c = this.charCodeAt(i);a.push(m[c] || c);};return String.fromCharCode.apply(null, a); };String.prototype.toZenkanaCase.MAPPING = {0xFF67:0x30A1,0xFF68:0x30A3,0xFF69:0x30A5,0xFF6A:0x30A7,0xFF6B:0x30A9,0xFF70:0x30FC,0xFF71:0x30A2,0xFF72:0x30A4,0xFF73:0x30A6,0xFF74:0x30A8,0xFF75:0x30AA,0xFF76:0x30AB,0xFF77:0x30AD,0xFF78:0x30AF,0xFF79:0x30B1,0xFF7A:0x30B3,0xFF7B:0x30B5,0xFF7C:0x30B7,0xFF7D:0x30B9,0xFF7E:0x30BB,0xFF7F:0x30BD,0xFF80:0x30BF,0xFF81:0x30C1,0xFF82:0x30C4,0xFF83:0x30C6,0xFF84:0x30C8,0xFF85:0x30CA,0xFF86:0x30CB,0xFF87:0x30CC,0xFF88:0x30CD,0xFF89:0x30CE,0xFF8A:0x30CF,0xFF8B:0x30D2,0xFF8C:0x30D5,0xFF8D:0x30D8,0xFF8E:0x30DB,0xFF8F:0x30DE,0xFF90:0x30DF,0xFF91:0x30E0,0xFF92:0x30E1,0xFF93:0x30E2,0xFF94:0x30E4,0xFF95:0x30E6,0xFF96:0x30E8,0xFF97:0x30E9,0xFF98:0x30EA,0xFF99:0x30EB,0xFF9A:0x30EC,0xFF9B:0x30ED,0xFF9C:0x30EF,0xFF9D:0x30F3,0xFF9E:0x309B,0xFF9F:0x309C,0xFF66:0x30F2 };

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