1、引入pom依赖
<dependency>
    <groupId>com.belerweb</groupId>
    <artifactId>pinyin4j</artifactId>
    <version>2.5.0</version>
</dependency>
2、自定义工具类

package com.tongtu.lzz.utils;

import net.sourceforge.pinyin4j.PinyinHelper;
import org.springframework.util.StringUtils;

public class PinyinUtils {
    static String[] InitialConsonant = {"zh","ch","sh"};

    /**
     * 汉字字符串获取第n个汉字的全拼
     * @param characters
     * @param n
     * @return
     */
    public static String CharacterToPinyin(String characters,int n){
        String pinyin = null;
        if(null == characters){
            return "";
        }
        characters = characters.trim();
        characters = characters.replaceAll(" ", "");
        if("".equals(characters)){
            return "";
        }
        char c = characters.charAt(n);
        boolean fg = isChineseChar(String.valueOf(c));
        if(!fg){
            return "";
        }
        String[] pinyins = PinyinHelper.toHanyuPinyinStringArray(c);
        pinyin = pinyins[0];
        return pinyin;
    }

    /**
     * 汉字字符串获取第n个汉字的声母+声调，声调用数字表示；1：一声、2：二声、3：三声、4：四声。如：赵匡胤 返回 zh4
     * @param characters
     * @param n
     * @return
     */
    public static String CharacterToInitialConsonantWithTone(String characters,int n){
        if(null == characters){
            return "";
        }
        String initialConsonant = "";
        String tone = "";
        characters = characters.trim();
        characters = characters.replaceAll(" ", "");

        if("".equals(characters)){
            return "";
        }
        char c = characters.charAt(n);
        boolean fg = isChineseChar(String.valueOf(c));
        if(!fg){
            return "";
        }
        String[] pinyins = PinyinHelper.toHanyuPinyinStringArray(c);
        String pinyin = pinyins[0];
        if(StringUtils.hasText(pinyin)){
            tone = pinyin.substring(pinyin.length()-1);
        }
        for (int i = 0; i < InitialConsonant.length; i++) {
            String string = InitialConsonant[i];
            if(0 == pinyin.indexOf(string)){
                initialConsonant = string;
                break;
            }
        }
        if(!StringUtils.hasText(initialConsonant)){
            initialConsonant = pinyin.substring(0, 1);
        }
        return initialConsonant+tone;
    }

    /**
     * 汉字字符串获取全拼+声调
     * @param characters
     * @return
     */
    public static String CharactersToPinyinWithTones(String characters){
        String pinyinFull = "";
        if(null == characters){
            return pinyinFull;
        }
        characters = characters.trim();
        characters = characters.replaceAll(" ", "");
        if("".equals(characters)){
            return pinyinFull;
        }
        boolean fg = isChineseChar(characters);
        if(!fg){
            return pinyinFull;
        }
        int len = characters.length();
        for (int i = 0; i < len; i++) {
            char c = characters.charAt(i);
            String[] pinyins = PinyinHelper.toHanyuPinyinStringArray(c);
            String pinyin = pinyins[0];
            if(StringUtils.hasText(pinyin)){
                pinyinFull += pinyin;
            }
        }
        return pinyinFull;
    }

    /**
     * 判断一个字符是否是汉字
     * 中文汉字的编码范围：[\u4e00-\u9fa5]
     *
     * @param c 需要判断的字符
     * @return 是汉字(true), 不是汉字(false)
     */
    public static boolean isChineseChar(String c) {
        return c.matches("[\\u4E00-\\u9FA5]+");
    }
}

3、使用

//排序
if (result.size() > 0) {
    Collections.sort(result, new Comparator<ZGYPullVo>() {
        @Override
        public int compare(ZGYPullVo o1, ZGYPullVo o2) {
            String un1 = o1.getName();
            String un2 = o2.getName();
            String pinyin1 = PinyinUtils.CharactersToPinyinWithTones(un1);
            String pinyin2 = PinyinUtils.CharactersToPinyinWithTones(un2);
            if (!StringUtils.hasText(pinyin1)) {
                pinyin1 = "zzzzz4";
            }
            if (!StringUtils.hasText(pinyin2)) {
                pinyin2 = "zzzzz4";
            }
            int ct = pinyin1.compareToIgnoreCase(pinyin2);
            return ct;
        }
    });
}