java汉字转拼音的工具类

import com.google.common.base.Strings;
import net.sourceforge.pinyin4j.PinyinHelper;
import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat;
import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;
import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.TreeSet;

public class PinyinUtils {
    private static final Logger logger = LoggerFactory.getLogger(PinyinUtils.class);

    /**
     * 单字解析
     *
     * @param str first
     * @return
     */
    public static String[] convert(String str) {
        String[] reslut = null;
        HanyuPinyinOutputFormat hanyuPinyinOutputFormat = new HanyuPinyinOutputFormat();
        hanyuPinyinOutputFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        try {
            reslut = PinyinHelper.toHanyuPinyinStringArray(str.charAt(0), hanyuPinyinOutputFormat);
            TreeSet<String> stringTreeSet = new TreeSet<>();
            for (int i = 0; i < reslut.length; i++) {
                if(reslut.length >=3) {
                    break;
                }
                stringTreeSet.add(reslut[i].replace("u:","v"));
            }
            reslut = new String[stringTreeSet.size()];
            reslut = stringTreeSet.toArray(reslut);
        } catch (BadHanyuPinyinOutputFormatCombination badHanyuPinyinOutputFormatCombination) {
            badHanyuPinyinOutputFormatCombination.printStackTrace();
        } catch (Exception e) {
            logger.error("[convert]: ", e);
        }
        return reslut;
    }

    /**
     * 词组解析(全写)
     *
     * @param chs
     * @return
     */
    public static String getSelling(String chs) {
        return translate(chs, false);
    }

    /**
     * 汉字转拼音
     *
     * @param chs
     * @param acronym
     * @return
     */
    private static String translate(String chs, boolean acronym) {
        StringBuffer buffer=new StringBuffer();
        if (Strings.isNullOrEmpty(chs))
            return "";
        try {
            List<List<String>> temps = new ArrayList<>();
            int len = chs.length();
            int len1 = 0;
            for (int i = 0; i < len; i++) {
                List<String> stringList = new ArrayList<>();
                String key = chs.charAt(i) + "";
                if (key.getBytes().length >= 2) {
                    String[] temp = convert(key);
                    if(temp.length == 0) {
                        continue;
                    }
                    if (temp == null) {
                        stringList.add("");
                    } else {
                        for (String v : temp) {
                            stringList.add(v);
                        }
                    }
                } else {
                    stringList.add(key);
                }
                temps.add(stringList);
                len1++;
            }
            List<List<String>> t = new ArrayList<>();
            for (int i = 0; i < len1; i++) {
                List<String> currentList = new ArrayList<>();
                List<String> stringList = temps.get(i);
                if (stringList != null) {
                    for (String s : stringList) {
                        if (acronym) {
                            s = s.charAt(0) + "";
                        }
                        if (i > 0) {
                            List<String> preList = t.get(i - 1);
                            if (preList != null) {
                                for (String s1 : preList) {
                                    currentList.add(s1 + s);
                                }
                            }
                        }else{
                            currentList.add(s);
                        }
                    }
                }
                t.add(i, currentList);
            }
            if (t.size()>0){
                List<String> currentList= t.get(t.size()-1);
                if (currentList!=null){
                    for(String current : currentList){
                        buffer.append(current);
                        buffer.append("");
                    }
                }
            }
            return buffer.toString();
        } catch (Exception e) {
            logger.error("[getSortLetters]: ", e);
            return "";
        }
    }

    /**
     * 词组解析(缩写)
     *
     * @param chs
     * @return
     */
    public static String getSmallSelling(String chs) {
        return translate(chs, true);
    }

    /**
     * 获取首字母
     *
     * @return
     */
    public static String getSortLetters(String pingyin) {
        try {
            String sortString = pingyin.substring(0, 1).toUpperCase(Locale.getDefault());
            // 正则表达式，判断首字母是否是英文字母
            if (sortString.matches("[A-Z]")) {
                return sortString.toUpperCase(Locale.getDefault());
            }
        } catch (Exception e) {
            logger.error("[getSortLetters]: ", e);
        }
        return "#";
    }

    public static void main(String [] args) {
        PinyinUtils p = new PinyinUtils();

        System.out.println(p.getSelling("单个"));
        System.out.println(p.getSmallSelling("测试"));
    }
}