第一步：pom.xml檔案中引入pinyin4j依賴

<dependency>
    <groupId>com.belerweb</groupId>
    <artifactId>pinyin4j</artifactId>
    <version>2.5.0</version>
</dependency>

第二步：新增PinYinUtil工具類

/*
 * Copyright (C) 2018 Baidu, Inc. All Rights Reserved.
 */
package test;

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.exception.BadHanyuPinyinOutputFormatCombination;

/**
 * 漢字轉換為拼音
 * @author Red
 */
public class PinYinUtil {
    /**
     * 測試main方法
     * @param args
     */
    public static void main(String[] args) {
        System.out.println(toFirstChar("漢字轉換為拼音").toUpperCase()); //轉為首字母大寫
        System.out.println(toPinyin("漢字轉換為拼音"));
    }
    /**
     * 獲取字串拼音的第一個字母
     * @param chinese
     * @return
     */
    public static String toFirstChar(String chinese){
        String pinyinStr = "";
        char[] newChar = chinese.toCharArray();  //轉為單個字元
        HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
        defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
        defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        for (int i = 0; i < newChar.length; i++) {
            if (newChar[i] > 128) {
                try {
                    pinyinStr += PinyinHelper.toHanyuPinyinStringArray(newChar[i], defaultFormat)[0].charAt(0);
                } catch (BadHanyuPinyinOutputFormatCombination e) {
                    e.printStackTrace();
                }
            }else{
                pinyinStr += newChar[i];
            }
        }
        return pinyinStr;
    }

    /**
     * 漢字轉為拼音
     * @param chinese
     * @return
     */
    public static String toPinyin(String chinese){
        String pinyinStr = "";
        char[] newChar = chinese.toCharArray();
        HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
        defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
        defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        for (int i = 0; i < newChar.length; i++) {
            if (newChar[i] > 128) {
                try {
                    pinyinStr += PinyinHelper.toHanyuPinyinStringArray(newChar[i], defaultFormat)[0];
                } catch (BadHanyuPinyinOutputFormatCombination e) {
                    e.printStackTrace();
                }
            }else{
                pinyinStr += newChar[i];
            }
        }
        return pinyinStr;
    }
}

第三步：呼叫PinYinUtil工具類靜態方法實現漢字向拼音的轉換

PinYinUtil.toPinyin(vo.getName())

延伸閱讀：

https://github.com/belerweb/pinyin4j 在github開源專案中可以找到maven中可以引入的最新版本的配置，如下：