Maven依赖

<dependency>
            <groupId>com.belerweb</groupId>
            <artifactId>pinyin4j</artifactId>
            <version>2.5.1</version>
</dependency>

PinYinUtil 工具类

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;

/**
 * <p>
 * <h2>拼音工具类</h2 > 博客地址：<a href="">...</a>
 * </p>
 *
 * @author Evan
 * @CreateTime 2022/4/6 9:24
 */
public class PinYinUtil {
    
    
    /**
     * 将字符串中的中文转化为拼音,其他字符不变
     *
     * @param inputString 要转换的字符串
     * @return 字符串对应首字母拼音
     */
    public static String getPingYin(String inputString) {
    
    
        HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();
        format.setCaseType(HanyuPinyinCaseType.LOWERCASE);
        format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        format.setVCharType(HanyuPinyinVCharType.WITH_V);
        char[] input = inputString.trim().toCharArray();
        StringBuilder output = new StringBuilder();
        try {
    
    
            for (char c : input) {
    
    
                if (Character.toString(c).matches("[\\u4E00-\\u9FA5]+")) {
    
    
                    String[] temp = PinyinHelper.toHanyuPinyinStringArray(c, format);
                    output.append(temp[0]);
                } else {
    
    output.append(c);}
            }
        } catch (BadHanyuPinyinOutputFormatCombination e) {
    
    
            e.printStackTrace();
        }
        return output.toString();
    }

    /**
     * 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) {
    
    
        StringBuilder pybf = new StringBuilder();
        char[] arr = chinese.toCharArray();
        HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
        defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
        defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        for (char c : arr) {
    
    
            if (c > 128) {
    
    
                try {
    
    
                    String[] temp = PinyinHelper.toHanyuPinyinStringArray(c, defaultFormat);
                    if (temp != null) {
    
    
                        pybf.append(temp[0].charAt(0));
                    }
                } catch (BadHanyuPinyinOutputFormatCombination e) {
    
    
                    e.printStackTrace();
                }
            } else {
    
    
                pybf.append(c);
            }
        }
        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) {
    
    
        StringBuilder pybf = new StringBuilder();
        char[] arr = chinese.toCharArray();
        HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
        defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
        defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        for (char c : arr) {
    
    
            if (c > 128) {
    
    
                try {
    
    
                    pybf.append(PinyinHelper.toHanyuPinyinStringArray(c, defaultFormat)[0]);
                } catch (BadHanyuPinyinOutputFormatCombination e) {
    
    
                    e.printStackTrace();
                }
            } else {
    
    
                pybf.append(c);
            }
        }
        return pybf.toString();
    }
}