汉字转化为拼音

使用pinyin4j.jar即可。

package com.wangzhu.pinyin;

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 Pinyin {
    public static void main(String[] args) {
        Pinyin pinyin = new Pinyin();
        System.out.println(pinyin.getPinyin("好呀！呵呵!Welcome to ."));
        System.out.println(pinyin.getPinyinHeadChar("好呀！呵呵!Welcome to ."));
    }

    /**
     * 返回中文拼音
     * 
     * @param hanzi
     *            中文
     * @return 中文拼音
     */
    private String getPinyin(String hanzi) {
        StringBuffer pinyin = new StringBuffer();
        char[] hanziChar = hanzi.toCharArray();
        HanyuPinyinOutputFormat pinyinOutputFormat = new HanyuPinyinOutputFormat();
        pinyinOutputFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
        pinyinOutputFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        pinyinOutputFormat.setVCharType(HanyuPinyinVCharType.WITH_V);
        try {
            for (int i = 0, len = hanziChar.length; i < len; i++) {
                if (Character.toString(hanziChar[i]).matches(
                        "[\\u4E00-\\u9FA5]+")) {

                    String[] tempArr = PinyinHelper.toHanyuPinyinStringArray(
                            hanziChar[i], pinyinOutputFormat);

                    pinyin.append(tempArr[0]);
                } else {
                    pinyin.append(Character.toString(hanziChar[i]));
                }
            }
        } catch (BadHanyuPinyinOutputFormatCombination e) {
            e.printStackTrace();
        }
        return pinyin.toString();
    }

    /**
     * 返回中文拼音的首字母
     * 
     * @param hanzi
     *            中文
     * @return 中文拼音首字母
     */
    protected String getPinyinHeadChar(String hanzi) {
        StringBuffer pinyinHead = new StringBuffer();
        for (int i = 0, len = hanzi.length(); i < len; i++) {
            char tempChar = hanzi.charAt(i);
            String[] tempArr = PinyinHelper.toHanyuPinyinStringArray(tempChar);
            if (null != tempArr) {
                pinyinHead.append(tempArr[0].charAt(0));
            } else {
                pinyinHead.append(tempChar);
            }
        }
        return pinyinHead.toString();
    }
}

结果：

haoya！hehe!Welcome to .
hy！hh!Welcome to .

以下是反射机制的调用：

package com.wangzhu.reflect;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class TextReflect {

    /**
     * @param args
     * @throws ClassNotFoundException
     * @throws NoSuchMethodException
     * @throws SecurityException
     * @throws InstantiationException
     * @throws InvocationTargetException
     * @throws IllegalAccessException
     * @throws IllegalArgumentException
     */
    public static void main(String[] args) throws ClassNotFoundException,
            SecurityException, NoSuchMethodException, IllegalArgumentException,
            IllegalAccessException, InvocationTargetException,
            InstantiationException {
        Class<?> classForName = Class.forName("com.wangzhu.pinyin.Pinyin");
        Object obj = classForName.newInstance();
        Method[] methods = classForName.getDeclaredMethods();
        for (int i = 0, len = methods.length; i < len; i++) {
            System.out.println(methods[i].getName());
        }
        Method method = classForName.getDeclaredMethod("getPinyin",
                String.class);
        method.setAccessible(true);// 只有设置为true，才能访问该私有方法
        Object temp = method.invoke(obj, "开始啦！恩雅 ！之乎者也一眼在！Welcome the World!@");
        System.out.println(temp);
    }
}

结果：

main
getPinyin
getPinyinHeadChar
kaishila！enya ！zhihuzheyeyiyanzai！Welcome the World!@