需要jar文件：pinyin4j-2.5.0.jar下载地址：http://sourceforge.net/projects/pinyin4j/

示例代码：

package com.wqd.common.util;

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;

/** * 汉字转为拼音 */public class ConvertPinyin {  /**    * 汉字转全拼   *     * @param str     * @return    * @throws Exception  */   public static String getPinyin(String str) throws Exception {     if (str== null || str.length()==0) {          return "";      }     char[] t1 = null;        t1 = str.toCharArray();      String[] t2 = new String[t1.length];     // 设置汉字拼音输出的格式        HanyuPinyinOutputFormat t3 = new HanyuPinyinOutputFormat();      t3.setCaseType(HanyuPinyinCaseType.LOWERCASE);// 小写       t3.setToneType(HanyuPinyinToneType.WITHOUT_TONE);// 不带声调      t3.setVCharType(HanyuPinyinVCharType.WITH_V);

      String t4 = "";        int t0 = t1.length;      try {         for (int i = 0; i < t0; i++) {              // 判断是否为汉字字符              if (Character.toString(t1[i]).matches("[\\u4E00-\\u9FA5]+")) {                 // 将汉字的几种全拼都存到t2数组中                   t2 = PinyinHelper.toHanyuPinyinStringArray(t1[i], t3);                   t4 += t2[0];// 取出该汉字全拼的第一种读音并连接到字符串t4后              } else {                  // 如果不是汉字字符，直接取出字符并连接到字符串t4后                   t4 += Character.toString(t1[i]);                }         }     } catch (BadHanyuPinyinOutputFormatCombination e) {           throw e;      }     return t4;    }

   /**    * 汉字转简拼   * @param str     * @return String     */   public static String getPinYinHeadChar(String str) {      String convert = "";       if (str== null || str.length()==0) {          return convert;       }     for (int j = 0; j < str.length(); j++) {            char word = str.charAt(j);           // 提取汉字的首字母           String[] pinyinArray = PinyinHelper.toHanyuPinyinStringArray(word);          if (pinyinArray != null) {               convert += pinyinArray[0].charAt(0);            } else {              convert += word;            }     }     return convert.toUpperCase(); }

   public static void main(String[] arg0) throws Exception{      String str ="哗啦啦 Chian";       System.out.println(getPinyin(str));       System.out.println(getPinYinHeadChar(str));   }

}