<dependency>
      <groupId>com.belerweb</groupId>
      <artifactId>pinyin4j</artifactId>
      <version>2.5.1</version>
</dependency>

public class PinYinUtils {

  public static HanyuPinyinOutputFormat PINYIN_FORMAT;
  static {

    PINYIN_FORMAT = new HanyuPinyinOutputFormat();
    /**
     * 大小寫設(shè)置
     *   LOWERCASE:小寫
     *   UPPERCASE:大寫
     */
    PINYIN_FORMAT.setCaseType(HanyuPinyinCaseType.LOWERCASE);
    /**
     * 輸出音標(biāo)設(shè)置
     *
     * WITH_TONE_MARK:直接用音標(biāo)符（VCharType必須設(shè)置WITH_U_UNICODE，否則會(huì)拋出異常）
     * WITH_TONE_NUMBER：1-4數(shù)字表示音標(biāo)
     * WITHOUT_TONE：沒(méi)有音標(biāo)
     */
    PINYIN_FORMAT.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
    /**
     * 特殊音符ü的設(shè)置
     * WITH_U_AND_COLON:用u表示(沒(méi)有設(shè)置默認(rèn)用u表示)
     * WITH_V:用v表示
     * WITH_U_UNICODE:用ü表示
     */
    PINYIN_FORMAT.setVCharType(HanyuPinyinVCharType.WITH_U_UNICODE);
  }

  /**
   * 取漢字的拼音首字母
   * @param chinese
   * @return
   */
  public static String toFirstPinYin(String chinese){
    StringBuilder result = new StringBuilder();
    //將字符串轉(zhuǎn)成字符數(shù)組
    char[] chars = chinese.toCharArray();
    try {
      for (char c : chars) {
        //是中文則進(jìn)行轉(zhuǎn)換
        if(String.valueOf(c).matches("[\u4e00-\u9fa5]+")){
          String[] pinyinStr = PinyinHelper.toHanyuPinyinStringArray(c, PINYIN_FORMAT);
          result.append(pinyinStr[0].charAt(0));//取每個(gè)中文的第一個(gè)拼音字母
        }else {
          result.append(c);
        }
      }
    } catch (BadHanyuPinyinOutputFormatCombination badHanyuPinyinOutputFormatCombination) {
      badHanyuPinyinOutputFormatCombination.printStackTrace();
    }
    return result.toString();
  }

  /**
   * 漢字轉(zhuǎn)拼音小寫
   * @param chinese
   * @return
   */
  public static String toPinYin(String chinese){
    //創(chuàng)建返回對(duì)象
    StringBuilder result = new StringBuilder();//方法調(diào)用的時(shí)候新建，對(duì)象沒(méi)有共享，不會(huì)有線程安全問(wèn)題。
    //將字符串轉(zhuǎn)成字符數(shù)組
    char[] chars = chinese.toCharArray();
    try {
      for (char c : chars) {
        //是中文則進(jìn)行轉(zhuǎn)換
        if(String.valueOf(c).matches("[\u4e00-\u9fa5]+")){
          String[] pinyinStr = PinyinHelper.toHanyuPinyinStringArray(c, PINYIN_FORMAT);
//          result.append(pinyinStr[0].charAt(0));//取每個(gè)中文的第一個(gè)拼音字母
          result.append(pinyinStr[0]);
        }else {
          result.append(c);
        }
      }
    } catch (BadHanyuPinyinOutputFormatCombination badHanyuPinyinOutputFormatCombination) {
      badHanyuPinyinOutputFormatCombination.printStackTrace();
    }
    return result.toString();
  }
  /**
   * 漢字轉(zhuǎn)拼音每個(gè)字符串的第一個(gè)字母大寫其余小寫
   * @param chinese
   * @return
   */
  public static String toUpperStringsFirstCharPinYin(String chinese){
    //創(chuàng)建返回對(duì)象
    StringBuilder result = new StringBuilder();//方法調(diào)用的時(shí)候新建，對(duì)象沒(méi)有共享，不會(huì)有線程安全問(wèn)題。
    //將字符串轉(zhuǎn)成字符數(shù)組
    char[] chars = chinese.toCharArray();
    try {
      for (char c : chars) {
        //是中文則進(jìn)行轉(zhuǎn)換
        if(String.valueOf(c).matches("[\u4e00-\u9fa5]+")){
          String[] pinyinStr = PinyinHelper.toHanyuPinyinStringArray(c, PINYIN_FORMAT);
//          result.append(pinyinStr[0].charAt(0));//取每個(gè)中文的第一個(gè)拼音字母
          String c1 = String.valueOf(pinyinStr[0]);
          result.append(c1.substring(0,1).toUpperCase()).append(c1.substring(1));
        }else {
          result.append(c);
        }
      }
    } catch (BadHanyuPinyinOutputFormatCombination badHanyuPinyinOutputFormatCombination) {
      badHanyuPinyinOutputFormatCombination.printStackTrace();
    }
    return result.toString();
  }

  public static void main(String[] args) {
    //測(cè)試StringBuilder是否有線程安全問(wèn)題
    String str = "拼音工具lv";
    String pinYin = toUpperStringsFirstCharPinYin(str);
    System.out.println(pinYin);
  }
}