代码

import net.sourceforge.pinyin4j.PinyinHelper;
import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat;
import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;
import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType;
import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination;

public class PyUtil {

    private static String getCharacterPinYin(char c) throws BadHanyuPinyinOutputFormatCombination{

        HanyuPinyinOutputFormat format= new HanyuPinyinOutputFormat();
        format.setToneType(HanyuPinyinToneType.WITH_TONE_MARK);
        format.setVCharType(HanyuPinyinVCharType.WITH_U_UNICODE);
        String[] pinyin = null;
        try  {
            pinyin = PinyinHelper.toHanyuPinyinStringArray(c, format);
        } catch(BadHanyuPinyinOutputFormatCombination e) {
            e.printStackTrace();
        }
        // 如果c不是汉字，toHanyuPinyinStringArray会返回null
        if(pinyin == null) return null;
        // 只取一个发音，如果是多音字，仅取第一个发音
        return pinyin[0];
    }

    public static String getStringPinyin(String str)  {

        HanyuPinyinOutputFormat format= new HanyuPinyinOutputFormat();
        format.setToneType(HanyuPinyinToneType.WITH_TONE_MARK);
        format.setVCharType(HanyuPinyinVCharType.WITH_U_UNICODE);
        String[] pinyinArray = null;
        try {
            StringBuilder sb = new StringBuilder();
            String tempPinyin = null;
            for(int i = 0; i < str.length(); ++i)
            {
                tempPinyin =getCharacterPinYin(str.charAt(i));
                if (sb.length() > 0) {
                    sb.append(" ");
                }
                if(tempPinyin == null) {
                    // 如果str.charAt(i)非汉字，则保持原样
                    sb.append(str.charAt(i));
                }
                else {
                    sb.append(tempPinyin);
                }
            }
            return sb.toString();
        } catch(BadHanyuPinyinOutputFormatCombination e)  {
            e.printStackTrace();
            return "";
        }
    }



}

测试代码

    public static void main(String[] args) {
        String temp = PyUtil.getStringPinyin("唐贏");
        System.out.println(temp);
    }

执行效果