具有多层的 Java Map

Question

我正在尝试将下面的数据转换为某种形式的 Java 结构。数据代表一场网球锦标赛，乔以 6-3、6-4 击败肯，莎莉以 6-4、2-6、6-1 击败露西。据我所知，我应该能够使用法线贴图，像这样 Map1<Key1, Map2<Key2, Map3<Key3, Value>>>让我失望的是我不会每次都进入最后一层(GameResult)。以 FixtureResult 和 MatchResult 的变量为例。此外，每个 MatchResult 都会有多个 GameResult 集，那么如何从 MatchResult(父)角度为这些 GameResult 对象提供唯一的键？

<FixtureResult>
    <Id>1</Id>
    <FixtureId>1</FixtureId>
    <DateSubmitted>07-01-2017</DateSubmitted>

    <MatchResult>
        <Id>1</Id>
        <WinnerName>Joe</WinnerName>
        <LoserName>Ken</LoserName>  

        <GameResult>
            <Id>1</Id>
            <WinnerPoints>6</WinnerPoints>
            <LoserPoints>3</LoserPoints>    
            <Ordinal>1</Ordinal>
        </GameResult>

        <GameResult>
            <Id>2</Id>
            <WinnerPoints>6</WinnerPoints>
            <LoserPoints>4</LoserPoints>    
            <Ordinal>2</Ordinal>
        </GameResult>

    </MatchResult>

    <MatchResult>
        <Id>2</Id>
        <WinnerName>Sally</WinnerName>
        <LoserName>Lucy</LoserName> 

        <GameResult>
            <Id>3</Id>
            <WinnerPoints>6</WinnerPoints>
            <LoserPoints>4</LoserPoints>    
            <Ordinal>1</Ordinal>
        </GameResult>

        <GameResult>
            <Id>4</Id>
            <WinnerPoints>2</WinnerPoints>
            <LoserPoints>6</LoserPoints>    
            <Ordinal>2</Ordinal>
        </GameResult>

        <GameResult>
            <Id>5</Id>
            <WinnerPoints>6</WinnerPoints>
            <LoserPoints>1</LoserPoints>    
            <Ordinal>3</Ordinal>
        </GameResult>

    </MatchResult>
</FixtureResult>

Answer 1

为什么不使用您定义的结构？

class FixtureResult {
  Integer id;
  Integer FixtureId;
  Date dateSubmitted;
  List<MatchResult> matchResults
}
class MatchResult {
  Integer id;
  String winnerName;
  String loserName;
  List<GameResult> gameResults
}
class GameResult {
  Integer id;
  Integer winnerPoints;
  Integer loserPoints;
  Integer ordinal;
}