根据中文名称首字母进行分组
很多项目中，需要用到中文名称到首字母进行分组，例如：城市、游戏等等。。。/**
* 将集合数据按照汉字首字母分组排序
*
* @param list
* @return
*/
public Map<String, Object> screenManufacturer(List<Game> list) {
Set<String> hasAddedNameSet = new HashSet<>();
long start = System.currentTimeMillis();
try {
// 输出26个字母
Map<String, Object> map = new TreeMap<>();
int n = 0;
for (int i = 1; i < 27; i++) {
String word = String.valueOf((char) (96 + i)).toUpperCase();
// 循环找出 首字母一样的数据
List<Game> letter = new ArrayList<>();
for (Iterator<Game> iter = list.listIterator(); iter.hasNext(); ) {
Game game = iter.next();
if (hasAddedNameSet.contains(game.getName())) {
continue;
}
String pybf = PinyinUtil.getFullSpell(game.getName());
String firstWord = pybf.substring(0, 1);
if (word.equalsIgnoreCase(firstWord)) {
hasAddedNameSet.add(game.getName());
letter.add(game);
}
n++;
}
map.put(word, letter);
}
log.info("总共循坏了{}次", n);
long end = System.currentTimeMillis();
log.info("总耗时：{}毫秒", end - start);
return map;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
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;
import java.text.Collator;
import java.util.*;
public class PinyinUtil {
public static void main(String[] args) {
List<String> names = new ArrayList<>();
names.add("张三");
names.add("李四");
names.add("王武");
names.add("刘德华");
names.add("精舍蓝军");
Map<String, Object> stringObjectMap = screenManufacturer(names);
System.out.println(stringObjectMap);
}
/**
* 获取汉字串拼音，英文字符不变
*/
public static String getFullSpell(String chinese) {
StringBuffer pybf = new StringBuffer();
char[] arr = chinese.toCharArray();
HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
defaultFormat.setCaseType(HanyuPinyinCaseType.UPPERCASE);
defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
for (int i = 0; i < arr.length; i++) {
if (arr > 128) {
try {
pybf.append(PinyinHelper.toHanyuPinyinStringArray(arr, defaultFormat));
} catch (BadHanyuPinyinOutputFormatCombination e) {
e.printStackTrace();
}
} else {
pybf.append(arr);
}
}
return pybf.toString();
}
/**
* 将集合数据按照汉字首字母分组排序
*/
public static Map<String, Object> screenManufacturer(List<String> list) {
try {
Collator com = Collator.getInstance(Locale.CHINA);
// 按字母排序
Collections.sort(list, com);
// 输出26个字母
Map<String, Object> map = new TreeMap<>();
for (int i = 1; i < 27; i++) {
String word = String.valueOf((char) (96 + i)).toUpperCase();
// 循环找出 首字母一样的数据
List<String> letter = new ArrayList<>();
for (String str : list) {
String pybf = getFullSpell(str);
String zm = pybf.substring(0, 1);
if (word.equals(zm)) {
letter.add(str);
}
}
map.put(word, letter);
}
return map;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
POM文件
<!--拼音-->
<dependency>
<groupId>com.belerweb</groupId>
<artifactId>pinyin4j</artifactId>
<version>2.5.0</version>
</dependency> 天生的效果
{
"code": 200,
"message": "操作成功",
"data": {
"A": [],
"B": [],
"C": [
{
"gameId": "g123",
"name": "CS"
}
],
"D": [
{
"gameId": "g123",
"name": "地下城勇士"
},
{
"gameId": "g123",
"name": "DNF"
},
{
"gameId": "g123",
"name": "DOTA"
}
],
"E": [],
"F": [],
"G": [],
"H": [],
"I": [],
"J": [],
"K": [],
"L": [],
"M": [
{
"gameId": "g123",
"name": "魔兽世界"
}
],
"N": [],
"O": [],
"P": [],
"Q": [],
"R": [],
"S": [
{
"gameId": "g123",
"name": "守卫剑阁"
}
],
"T": [
{
"gameId": "7fbf48bb3204",
"name": "test22"
}
],
"U": [],
"V": [],
"W": [
{
"gameId": "g123",
"name": "王者荣耀"
}
],
"X": [],
"Y": [],
"Z": [
{
"gameId": "g123",
"name": "诛仙"
}
]
}
}
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