Java获取名字首字母拼音及用户按名字拼音分组工具

一、需求分析

最近在做一个类似于微信用户通讯录的功能，所以考虑通过查找的好友列表，在后台遍历按照26个字母分组，前台获取到Json循环26个字母直接解析对应的字符下的名称为一组分隔，没有则不显示，工具如下↓

二、代码工具

package ev.viewworld.util;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
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 changeChinesePinyinUtil {
	/**
	 * 获取姓名全拼和首字母
	 * @author 于公成
	 * @param  chinese 汉语名称
	 * @return fullPinyin : 全拼        simplePinyin ： 首字母  groudPinyin：微信用户组第一个字母
	 * @throws BadHanyuPinyinOutputFormatCombination
	 */
	public static Map changeChinesePinyin(String chinese) throws BadHanyuPinyinOutputFormatCombination { 
			Map pinyin = new HashMap(); 
	
			HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat(); 
			format.setCaseType(HanyuPinyinCaseType.LOWERCASE); 
			format.setToneType(HanyuPinyinToneType.WITHOUT_TONE); 
			format.setVCharType(HanyuPinyinVCharType.WITH_V); 
	
			StringBuffer fullPinyin = new StringBuffer(); 
			StringBuffer simplePinyin = new StringBuffer(); 
			StringBuffer firstPinyin = new StringBuffer(); 

			char[] chineseChar = chinese.toCharArray(); 
			for (int i = 0; i < chineseChar.length; i++) { 
					String[] str = null;  
				try { 
					str = PinyinHelper.toHanyuPinyinStringArray(chineseChar[i], 
					format); 
				} catch (BadHanyuPinyinOutputFormatCombination e) { 
					e.printStackTrace();
				} 
				if (str != null) { 
					fullPinyin = fullPinyin.append(str[0].toString()); 
					simplePinyin = simplePinyin.append(str[0].charAt(0)); 
				
				} 
					if (str == null) { 
					String regex = "^[0-9]*[a-zA-Z]*+$"; 
					Pattern pattern = Pattern.compile(regex); 
					Matcher m = pattern.matcher(String.valueOf(chineseChar[i])); 
						if (m.find()) { 
							fullPinyin = fullPinyin.append(chineseChar[i]); 
							simplePinyin = simplePinyin.append(chineseChar[i]); 
						} 
					} 
			} 
			String[] name = PinyinHelper.toHanyuPinyinStringArray(chineseChar[0],format); 
			firstPinyin=firstPinyin.append(name[0].charAt(0));			
			pinyin.put("fullPinyin", fullPinyin.toString()); 
			pinyin.put("simplePinyin", simplePinyin.toString().toUpperCase()); 
			pinyin.put("groudPinyin", firstPinyin.toString().toUpperCase());
			return pinyin; 
			} 
	/**
	 * 按用户拼音首字母分组
	 * @param list
	 * @return
	 * @throws BadHanyuPinyinOutputFormatCombination
	 */
	public static Map getUserCodeGroup(List list) throws BadHanyuPinyinOutputFormatCombination {
		Comparator