先决条件：

pinyin4j.jar(Pinyin4j是一个流行的Java库，支持中文字符和拼音之间的转换。拼音输出格式可以定制。)

下载地址：http://pan.baidu.com/share/link?shareid=3958741959&uk=3792676205

PinyinUtil.java

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 PinyinUtil {    /**     * 将字符串中的中文转化为拼音，其他字符不变     *      * @param inputStr     * @return 汉字拼音     */    public static String getPinYin(String inputStr) {        HanyuPinyinOutputFormat hpFormat = new HanyuPinyinOutputFormat();        hpFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);// 小写        hpFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);        hpFormat.setVCharType(HanyuPinyinVCharType.WITH_V);        char[] input = inputStr.trim().toCharArray();        String output = "";        try {            for (int i = 0; i < input.length; i++) {                if (java.lang.Character.toString(input[i]).matches(                        "[\\u4E00-\\u9FA5]+")) {                    String[] temp = PinyinHelper.toHanyuPinyinStringArray(                            input[i], hpFormat);                    output += temp[0];                } else {                    output += input[i];                }            }        } catch (Exception e) {            e.printStackTrace();        }        return output;    }    /**     * 获取汉字串拼音首字母，英文字符不变     *      * @param chinese     *            汉字串     * @return 汉语拼音首字母     */    public static String getFirstSpell(String chinese) {        StringBuffer pybf = new StringBuffer();        char[] arr = chinese.toCharArray();        HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();        defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);        defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);        defaultFormat.setVCharType(HanyuPinyinVCharType.WITH_V);        for (int i = 0; i < arr.length; i++) {            if (arr[i] > 128) {                try {                    String[] temp = PinyinHelper.toHanyuPinyinStringArray(                            arr[i], defaultFormat);                    if (temp != null) {                        pybf.append(temp[0].charAt(0));                    } else {                        pybf.append(arr[i]);                    }                } catch (BadHanyuPinyinOutputFormatCombination e) {                    e.printStackTrace();                }            }        }        return pybf.toString().replaceAll("\\W", "").trim();    }    /**     * 获取汉字串拼音，英文字符不变     *      * @param chinese     *            汉字串     * @return 汉语拼音     */    public static String getFullSpell(String chinese) {        StringBuffer pybf = new StringBuffer();        char[] arr = chinese.toCharArray();        HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();        defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);        defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);        defaultFormat.setVCharType(HanyuPinyinVCharType.WITH_V);        try {            for (int i = 0; i < arr.length; i++) {                if (arr[i] > 128) {                    pybf.append(PinyinHelper.toHanyuPinyinStringArray(arr[i],                            defaultFormat)[0]);                } else {                    pybf.append(arr[i]);                }            }        } catch (BadHanyuPinyinOutputFormatCombination e) {            e.printStackTrace();        }        return pybf.toString();    }

test.java

public class test {            public static void main(String[] args) {        String result = getPinYin("赠送");        System.out.println(result);    }}