汉字转拼音（pinyin4j-2.5.0.jar）

import net.sourceforge.pinyin4j.PinyinHelper;
import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType;
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 PinYinUtils {

    public static String toPinYin(String string){
        char[] c = string.toCharArray();
        StringBuffer stringBuffer = new StringBuffer();
        for(int i = 0; i< c.length; i++){
            stringBuffer.append(toChar(c[i]));
        }
        return stringBuffer.toString();
    }

    private static String toChar(char c){
        HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();
        format.setCaseType(HanyuPinyinCaseType.LOWERCASE);
        format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        format.setVCharType(HanyuPinyinVCharType.WITH_V);
        try{
            String[] pinYin = PinyinHelper.toHanyuPinyinStringArray(c, format);
            if(pinYin != null){
                return pinYin[0];
            }
        }
        catch(BadHanyuPinyinOutputFormatCombination ex){
            ex.printStackTrace();
        }
        return String.valueOf(c);
    }
}