使用Java 8 Streams API。

List<Value> values = map.values().stream().collect(Collectors.toList());

public List<Object> convertMapToList(Map<Object, Object> map){
return new ArrayList<>(map.values());
}

// you can use this
List<Value> list = new ArrayList<Value>(map.values());

// or you may use 
List<Value> list = new ArrayList<Value>();
for (Map.Entry<String, String> entry : map.entrySet())
{
list.add(entry.getValue());    
}

List<Value> list = new ArrayList<Value>(map.values());

假设：

Map<Key,Value> map;

如果需要值的不可变副本：

List<Value> list = List.copyOf(map.values())

 Map<String, String > map = new HapshMap<String, String>;
 map.add("one","java");
 map.add("two", "spring");
 Set<Entry<String, String>> set = map.entrySet();
 List<Entry<String, String>> list = new ArrayList<Entry<String, String>>    (set);
 for(Entry<String, String> entry : list) {
   System.out.println(entry.getKey());
   System.out.println(entry.getValue());
 }