java 中文與unicode互轉

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public class FontUtil {    public static void main(String[] args) {        System.out.println(chinaToUnicode("未登陸！"));        System.out.println(decodeUnicode("\u672a\u767b\u9646\uff01"));    }         /**      * 把中文轉成Unicode碼      *       * @param str      * @return      */      public static String chinaToUnicode(String str) {          String result = "";          for (int i = 0; i < str.length(); i++) {              int chr1 = (char) str.charAt(i);              if (chr1 >= 19968 && chr1 <= 171941) {// 漢字範圍 \u4e00-\u9fa5 (中文)                  result += "\\u" + Integer.toHexString(chr1);              } else {                  result += str.charAt(i);              }          }          return result;      }        /**      * 判斷是否為中文字元      *       * @param c      * @return      */      public static boolean isChinese(char c) {          Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);          if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS                  || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS                  || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A                  || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION                  || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION                  || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {              return true;          }          return false;      }              //Unicode轉中文      public static String decodeUnicode(final String unicode) {              StringBuffer string = new StringBuffer();                    String[] hex = unicode.split("\\\\u");              for (int i = 0; i < hex.length; i++) {                              try {                   // 漢字範圍 \u4e00-\u9fa5 (中文)                   if(hex[i].length()>=4){//取前四個，判斷是否是漢字                       String chinese = hex[i].substring(0, 4);                       try {                           int chr = Integer.parseInt(chinese, 16);                           boolean isChinese = isChinese((char) chr);                           //轉化成功，判斷是否在  漢字範圍內                           if (isChinese){//在漢字範圍內                               // 追加成string                               string.append((char) chr);                               //並且追加  後面的字元                               String behindString = hex[i].substring(4);                               string.append(behindString);                           }else {                               string.append(hex[i]);                           }                       } catch (NumberFormatException e1) {                           string.append(hex[i]);                       }                                          }else{                       string.append(hex[i]);                   }               } catch (NumberFormatException e) {                   string.append(hex[i]);               }           }              return string.toString();      }      }

 

java 中文與unicode互轉