什么实现了 MultiValueMap？

Question

I need to create an object of type MultiValueMap我需要创建一个 object 类型的 MultiValueMap

package org.springframework.util;

public interface MultiValueMap<K, V> extends Map<K, List<V>> {

and use it as a HashMap. What object shall I use?并将其用作 HashMap。我应该使用什么 object？ I tried HashMap but it didn't work.我试过 HashMap 但没有用。

Answer 1

You don't specify the context of what you need the class for so we can't tell you which one you should use.您没有指定您需要该类的上下文，因此我们无法告诉您应该使用哪个。 The most general one appears to be org.springframework.util.LinkedMultiValueMap ( https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/util/LinkedMultiValueMap.html ).最通用的似乎是org.springframework.util.LinkedMultiValueMap ( https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/util/LinkedMultiValueMap.html )。

Answer 2

您还可以使用方便的 util 函数从地图中调整一个。

org.springframework.util.CollectionUtils#toMultiValueMap

Answer 3

if you need a blind implementation you can use LinkedMultiValueMap<String, String>如果您需要盲目实施，您可以使用 LinkedMultiValueMap<String, String>