汉字转拼音Pinyin4j工具（C#、Java都可用）

C#用法：

string pinyin=GetStringPinYin("张三");
//方法如下
public static string GetStringPinYin(string hanzi) 
{
    HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();
    format.ToneType = HanyuPinyinToneType.WITHOUT_TONE;
    format.VCharType = HanyuPinyinVCharType.WITH_U_UNICODE;
    format.CaseType = HanyuPinyinCaseType.UPPERCASE;

    return PinyinHelper.ToHanyuPinyinString(hanzi, format, "");
}

参考：

http://www.cnblogs.com/bluestorm/archive/2012/07/23/2605412.html

http://blog.csdn.net/gebitan505/article/details/15501523