JAVA：使用DOM读取特定节点的XML

Question

我有一个XML文件，我通过我的java程序解析并搜索节点内的特定子字符串。我的XML结构如下：

<Album>
      <Title>The New Daylight</Title>
      <AlbumArtist>Dash Berlin</AlbumArtist>
      <Genre>House</Genre>
      <Publisher>Sony</Publisher>
      <AlbumYear>2012</AlbumYear>
      <AlbumPrice>20</AlbumPrice>
      <Song>
        <Artist>Dash Berlin</Artist>
        <SongTitle>Till the sky falls down</SongTitle>
        <SongGenre>House</SongGenre>
        <AlbumTitle>The New Daylight</AlbumTitle>
        <Year>2011</Year>
        <Price>10</Price>
      </Song>
      <Song>
        <Artist>Dash Berlin</Artist>
        <SongTitle>Better Half of Me</SongTitle>
        <SongGenre>House</SongGenre>
        <AlbumTitle>The New Daylight</AlbumTitle>
        <Year>2012</Year>
        <Price>10</Price>
      </Song>
</Album>
<Album>
      <Title>Problematic</Title>
      <AlbumArtist>Muse</AlbumArtist>
      <Genre>Rock</Genre>
      <Publisher>EMI</Publisher>
      <AlbumYear>2000</AlbumYear>
    <AlbumPrice>10</AlbumPrice>
      <Song>
        <Artist>Muse</Artist>
        <SongTitle>Head of the problematic</SongTitle>
        <SongGenre>Rock</SongGenre>
        <AlbumTitle>Muse Self Labeled</AlbumTitle>
        <Year>1999</Year>
        <Price>10</Price>
      </Song>
</Album>

例如，我有一堆专辑，我搜索了他们所有人找到了正确的专辑。我想存储我在arraylist中找到的所有歌曲。我做过类似的事情：

NodeList nl = docEle.getElementsByTagName("Album");

            for (int temp = 0; temp < nl.getLength(); temp++) {

                Element al = (Element)nl.item(temp);
                if (compareSearchwithAlbum(searchName, al)) {
                    NodeList nlist = docEle.getElementsByTagName("Song");
                    for (int i = 0; i < nlist.getLength(); i++) {
                        Element s = (Element)nlist.item(i);
                        searchedSongs.add(new Song (getString(s, "SongTitle"), getString(s, "AlbumTitle"), getInt(s, "Price"), getInt(s, "Year")));
                        // return or do something here
                    }
                }

问题是，当我运行那个内循环时，它抓住了专辑之外的所有不正确的歌曲，我想知道如何只抓取特定专辑中的歌曲。例如，来自Dash Berlin艺术家的所有歌曲。