java - 使用 jsoup 读取 XML

Question

我是 java 的新手，当然也是 jsoup 的新手。在我的程序的这个初步步骤中，我试图将一个基于 Web 的 XML 文件放入一个对象中，我可以开始使用它来输出我的内容。 (这是一个巨大的 XML 文件，我希望最终能够添加过滤器)

这是一些示例 XML。

<spell>
    <name>Acid Splash</name>
    <level>0</level>
    <school>C</school>
    <time>1 action</time>
    <range>60 feet</range>
    <components>V, S</components>
    <duration>Instantaneous</duration>
    <classes>Sorcerer, Wizard, Fighter (Eldritch Knight), Rogue (Arcane Trickster)</classes>
    <text>You hurl a bubble of acid. Choose one creature within range, or choose two creatures within range that are within 5 feet of each other. A target must succeed on a Dexterity saving throw or take 1d6 acid damage.</text>
    <text />
    <text>This spells damage increases by 1d6 when you reach 5th Level (2d6), 11th level (3d6) and 17th level (4d6).</text>
    <roll>1d6</roll>
    <roll>2d6</roll>
    <roll>3d6</roll>
    <roll>4d6</roll>
</spell>
<spell>
    <name>Aid</name>
    <level>2</level>
    <school>A</school>
    <time>1 action</time>
    <range>30 feet</range>
    <components>V, S, M (a tiny strip of white cloth)</components>
    <duration>8 hours</duration>
    <classes>Artificer, Cleric, Paladin</classes>
    <text>Your spell bolsters your allies with toughness and resolve. Choose up to three creatures within range. Each target's hit point maximum and current hit points increase by 5 for the duration.</text>
    <text />
    <text>At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, a target's hit points increase by an additional 5 for each slot level above 2nd.</text>
</spell>

到目前为止，这是我的代码。

private class Description extends AsyncTask<Void, Void, Void> {
    String desc;



    @Override
    protected Void doInBackground(Void... params) {
        try {
            // Connect to the web site
            Document document = Jsoup.parse(new URL(url).openStream(), "UTF-8", "", Parser.xmlParser());
            Elements elements = document.getElementsMatchingOwnText("name");
            // Using Elements to get the Meta data
            for(Element e : elements) {
                desc = desc +", "+ e;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        // Set description into TextView
        TextView txtdesc = (TextView) findViewById(R.id.desctxt);
        txtdesc.setText(desc);
    }
}

我想要它做什么:

输出:酸液飞溅，援助

它实际输出的内容: 输出:

<text>
This spells damage increases by 1d6 when you reach 5th Level (2d6), 11th level (3d6) and 17th level (4d6).
</text>, <text>
At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, a target's hit points increase by an additional 5 for each slot level above 2nd.
</text>

Answer 1

getElementsMatchingOwnText尝试根据其自身的文本查找元素，例如当您要查找 <name>Foo Bar</name> 时基于 Foo或 Bar .而是使用

• select支持CSS查询格式，
• 或document.getElementsByTag("name")

还要实际获取元素代表调用的文本 e.text() .

顺便说一句，您不应该通过连接在循环中构建字符串。在每次迭代中，这需要通过复制旧结果(可能很长)并向其中添加一些小部分来创建新字符串。而是使用 StringBuilder和 append它的新内容(此类是 char[] 相当大的数组的包装器，因此附加只是用文本填充它，当数组的长度不够时，它会被双倍大小的数组替换)。完成后，请调用 toString方法以字符串形式获取结果。

所以你想要的更像

Elements elements = document.getElementsByTag("name");
StringBuilder sb = new StringBuilder();
for(Element e : elements) {
    sb.append(e.text()).append(", ");
}
desc = sb.toString();