iteye_9939的博客

1、list转Map<String,String>public Map<String, String> getIdNameMap(List<Account> accounts) { return accounts.parallelStream().collect(Collectors.toMap(Account::getUserId, Account::getUsername));}2、list转Map<String,Account>publ

实现Map中按照Value排序/* flag = 1 正序* flag = 0 倒序* @param map* @param flag* @return/public static <K, V extends Comparable<? super V>> Map<K, V> sortByValue(Map<K, V> map, int...

根据map的key进行排序(倒序)public <K extends Comparable<? super K>, V > Map<K, V>sortByKey(Map<K,V>map){Map<K,V> result = new LinkedHashMap<>();map.entrySet().stream().so...