中文转拼音，pinyin4j实用示例

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。

Support Chinese character (both Simplified and Tranditional) to most popular Pinyin systems, including Hanyu Pinyin, Tongyong Pinyin, Wade-Giles, MPS2, Yale and Gwoyeu Romatzyh. Support multiple pronounciations and customized output.

pinyin4j是一个支持将中文转换到拼音的Java开源类库。

POM引入：

<dependency>
    <groupId>net.sourceforge.pinyin4j</groupId>
    <artifactId>pinyin4j</artifactId>
    <version>2.5.0</version>
</dependency>

项目地址：

https://sourceforge.net/projects/pinyin4j/ 

实用示例，如果一个汉字是多音字，那么将采取组装所有可能的组合：

package com.javacui.lucene.pinyin;
import java.util.HashSet;
import java.util.Set;
import com.alibaba.fastjson.JSON;
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;
/**
 * 打印中文拼音的所有组合
 */
public class Pinyin4j {
    public static void main(String[] args) {
        String cnStr = "长沙市重庆市";
        System.out.println(makePinyin(cnStr));
    }
    /**
     * 字符串凑集转换字符串(逗号分隔)
     */
    public static String makeStringByStringSet(Set<String> stringSet) {
        StringBuilder str = new StringBuilder();
        int i = 0;
        for (String s : stringSet) {
            if (i == stringSet.size() - 1) {
                str.append(s);
            } else {
                str.append(s + ",");
            }
            i++;
        }
        return str.toString().toLowerCase();
    }
    /**
     * 获取拼音凑集
     */
    public static Set<String> getPinyin(String src) {
        if (src != null && !src.trim().equalsIgnoreCase("")) {
            char[] srcChar;
            srcChar = src.toCharArray();
            // 汉语拼音格局输出类
            HanyuPinyinOutputFormat hanYuPinOutputFormat = new HanyuPinyinOutputFormat();
            // 输出设置,大小写,音标体式格式等
            hanYuPinOutputFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
//          HanyuPinyinToneType.WITH_TONE_NUMBER 用数字表示声调，例如：liu2
//          HanyuPinyinToneType.WITHOUT_TONE 无声调表示，例如：liu
//          HanyuPinyinToneType.WITH_TONE_MARK 用声调符号表示，例如：liú
            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];
                // 是中文或者a-z或者A-Z转换拼音(根据需求来)
                if (String.valueOf(c).matches("[\u4E00-\u9FA5]+")) {
                    try {
                        temp[i] = PinyinHelper.toHanyuPinyinStringArray(srcChar[i], hanYuPinOutputFormat);
                    } catch (BadHanyuPinyinOutputFormatCombination e) {
                        e.printStackTrace();
                    }
                } else if (((int) c >= 65 && (int) c <= 90) || ((int) c >= 97 && (int) c <= 122)) {
                    temp[i] = new String[] { String.valueOf(srcChar[i]) };
                } else {
                    temp[i] = new String[] { "" };
                }
            }
            System.out.println("中文单词分解："+JSON.toJSONString(temp));
            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
     */
    public static String[] Exchange(String[][] strJaggedArray) {
        String[][] temp = DoExchange(strJaggedArray);
        return temp[0];
    }
    /**
     * 递归
     */
    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;
        }
    }
    public static String makePinyin(String str){
        Set<String> set = getPinyin(str);
        System.out.println("中文单词组合："+JSON.toJSONString(set));
        return makeStringByStringSet(set);
    }
}