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，在项目中经常会遇到需求客户输入汉字后转换为拼音的场景，这时候Pinyin4j即可以派上用场
有自己私服的可以下载到私服，而后maven引入
<dependency> <groupId>net.sourceforge.pinyin4j</groupId> <artifactId>pinyin4j</artifactId> <version>2.5.0</version> </dependency>或者者自己去pinyin4j官网下载http://pinyin4j.sourceforge.net
Pinyin4j支持方式：
Pinyin4j支持多种格式：
针对什么情况，分别给出使用方法：
Pinyin4j pinyin4j = new Pinyin4j();String first1 = pinyin4j.toPinYinUppercase("测试中文");String first2 = pinyin4j.toPinYinUppercase("测试中文", "**");String first3 = pinyin4j.toPinYinLowercase("测试中文");String first4 = pinyin4j.toPinYinLowercase("测试中文","**");String first5 = pinyin4j.toPinYinUppercaseInitials("测试中文");String first6 = pinyin4j.toPinYinLowercaseInitials("测试中文");而后给出封装的工具类java代码：
import java.util.HashSet;import java.util.Set;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 Pinyin4jUtil { /** * getFirstSpellPinYin:(多音字的时候获取第一个). <br/> * @param src 传入的拼音字符串，以逗号隔开 * @param isFullSpell 能否全拼，true:全拼，false:第一个汉字全拼(其它汉字取首字母) * @return 第一个拼音 */ public static String getFirstSpellPinYin(String src , boolean isFullSpell) { String targetStr = Pinyin4jUtil.makeStringByStringSet(Pinyin4jUtil.getPinyin(src, isFullSpell)); String[] split = targetStr.split(","); if (split.length > 1) { targetStr = split[0]; } return targetStr; } /** * makeStringByStringSet:(拼音字符串集合转换字符串(逗号分隔)). <br/> * @param stringSet 拼音集合 * @return 带逗号字符串 */ public static String makeStringByStringSet(Set<String> stringSet) { StringBuilder str = new StringBuilder(); int i = 0; if (stringSet.size() > 0) { for (String s : stringSet) { if (i == stringSet.size() - 1) { str.append(s); } else { str.append(s + ","); } i++; } } return str.toString().toLowerCase(); } /** * getPinyin:(获取汉字拼音). <br/> * @param src 汉字 * @param isFullPin 能否全拼,假如为true：全拼，false:首字全拼 * @return */ public static Set<String> getPinyin(String src, boolean isFullSpell) { if (src != null && !src.trim().equalsIgnoreCase("")) { char[] srcChar; srcChar = src.toCharArray(); // 汉语拼音格式输出类 HanyuPinyinOutputFormat hanYuPinOutputFormat = new HanyuPinyinOutputFormat(); // 输出设置，大小写，音标方式等 hanYuPinOutputFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE); hanYuPinOutputFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE); hanYuPinOutputFormat.setVCharType(HanyuPinyinVCharType.WITH_V); String[][] temp = new String[src.length()][]; for (int i = 0; i < srcChar.length; i++) { char c = srcChar[i]; if (String.valueOf(c).matches("[\\u4E00-\\u9FA5]+")) {//中文 try { temp[i] = PinyinHelper.toHanyuPinyinStringArray( srcChar[i], hanYuPinOutputFormat); if (!isFullSpell) { if (i == 0) { temp[i] = temp[i]; } else { String[] tTemps = new String[temp[i].length]; for (int j = 0; j < temp[i].length; j++) { char t = temp[i][j].charAt(0); tTemps[j] = Character.toString(t); } temp[i] = tTemps; } } } catch (BadHanyuPinyinOutputFormatCombination e) { e.printStackTrace(); } } else if (((int) c >= 65 && (int) c <= 90) || ((int) c >= 97 && (int) c <= 122)) {//英文 temp[i] = new String[] { String.valueOf(srcChar[i]) }; } else { temp[i] = new String[] { "" }; } } String[] pingyinArray = exchange(temp); Set<String> pinyinSet = new HashSet<String>(); for (int i = 0; i < pingyinArray.length; i++) { pinyinSet.add(pingyinArray[i]); } return pinyinSet; } return null; } /** * 递归 * @param strJaggedArray * @return */ public static String[] exchange(String[][] strJaggedArray) { String[][] temp = doExchange(strJaggedArray); return temp[0]; } /** * 递归 * @param strJaggedArray * @return */ private static String[][] doExchange(String[][] strJaggedArray) { int len = strJaggedArray.length; if (len >= 2) { int len1 = strJaggedArray[0].length; int len2 = strJaggedArray[1].length; int newlen = len1 * len2; String[] temp = new String[newlen]; int Index = 0; for (int i = 0; i < len1; i++) { for (int j = 0; j < len2; j++) { temp[Index] = strJaggedArray[0][i] + strJaggedArray[1][j]; Index++; } } String[][] newArray = new String[len - 1][]; for (int i = 2; i < len; i++) { newArray[i - 1] = strJaggedArray[i]; } newArray[0] = temp; return doExchange(newArray); } else { return strJaggedArray; } } }