拼音排序

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package com.example.f; import java.util.Comparator;import net.sourceforge.pinyin4j.PinyinHelper; public class PinyinComparator implements Comparator { public int compare(String o1, String o2) { for (int i = 0; i < o1.length() && i < o2.length(); i++) { int codePoint1 = o1.charAt(i); int codePoint2 = o2.charAt(i); if (Character.isSupplementaryCodePoint(codePoint1) || Character.isSupplementaryCodePoint(codePoint2)) { i++;} if (codePoint1 != codePoint2) { if (Character.isSupplementaryCodePoint(codePoint1) || Character.isSupplementaryCodePoint(codePoint2)) { return codePoint1 - codePoint2;     } String pinyin1 = pinyin((char) codePoint1); String pinyin2 = pinyin((char) codePoint2); if (pinyin1 != null && pinyin2 != null) { // 两个字符都是汉字 if (!pinyin1.equals(pinyin2)) { return pinyin1.compareTo(pinyin2); } } else { return codePoint1 - codePoint2; } } }      return o1.length() - o2.length();      }          /** * 字符的拼音，多音字就得到第一个拼音。不是汉字，就return null。 */         private static String pinyin(char c) {         String[] pinyins = PinyinHelper.toHanyuPinyinStringArray(c);         if (pinyins == null) {         return null;         }         return pinyins[0];         }         }             //需要倒入pinyin4j－2.5.0.jar包！}}}}}
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