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MapUtil增加根据entry分组

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Looly
2022-09-04 22:09:01 +08:00
parent 3965535a2d
commit 508c139b22
2 changed files with 8 additions and 7 deletions
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14
hutool-core/src/main/java/cn/hutool/core/map/MapUtil.java
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@@ -107,7 +107,7 @@ public class MapUtil {
* @since 3.0.4
*/
public static <K, V> HashMap<K, V> newHashMap(int size, boolean isLinked) {
int initialCapacity = (int) (size / DEFAULT_LOAD_FACTOR) + 1;
final int initialCapacity = (int) (size / DEFAULT_LOAD_FACTOR) + 1;
return isLinked ? new LinkedHashMap<>(initialCapacity) : new HashMap<>(initialCapacity);
}
@@ -504,19 +504,19 @@ public class MapUtil {
* @return entries
*/
public static <K, V> Map<K, List<V>> grouping(Iterable<Map.Entry<K, V>> entries) {
final Map<K, List<V>> map = new HashMap<>(DEFAULT_INITIAL_CAPACITY);
final Map<K, List<V>> map = new HashMap<>();
if (CollUtil.isEmpty(entries)) {
return map;
}
for (Map.Entry<K, V> pair : entries) {
for (final Map.Entry<K, V> pair : entries) {
final List<V> values;
if (map.containsKey(pair.getKey())) {
List<V> values = map.get(pair.getKey());
values.add(pair.getValue());
values = map.get(pair.getKey());
} else {
List<V> values = CollUtil.<V>newArrayList();
values.add(pair.getValue());
values = new ArrayList<>();
map.put(pair.getKey(), values);
}
values.add(pair.getValue());
}
return map;
}