Question

我正在编写XML解析器来解析这样的文档：

但是到目前为止我的解析代码有些麻烦：

<?xml version="1.0"?>
<world x="1920" y="1080">
    <samples>2</samples>
    <camera>
        <origin x="0.0" y="50.0" z="-600.0"></origin>
        <direction x= "0.0" y = "0.0" z = "0.0"></direction>
        <FOV>30</FOV>
    </camera>
    <objects>
        <plane>
            <shader>Lambertian</shader>
            <colour r="1.0" g="1.0" b="1.0"></colour>
            <origin x="0.0" y="-80.0" z="0.0"></origin>
            <normal x="0.0" y="-1.0" z="0.0"></normal>
        </plane>
        <sphere>
            <shader>Lambertian</shader>
            <colour r="0.0" g="1.0" b="0.0"></colour>
            <origin x="-100.0" y="-40.0" z="-200.0"></origin>
            <radius>40</radius>
        </sphere>
        <sphere>
            <shader>Reflective</shader>
            <origin x="0.0" y="-40.0" z="-200.0"></origin>
            <radius>40</radius>
        </sphere>
        <sphere>
            <shader>Transparent</shader>
            <origin x="-40.0" y="-40.0" z="-300.0"></origin>
            <radius>40</radius>
            <ri>1.07</ri>
        </sphere>
    </objects>
    <lights>
        <light>
            <origin x="100.0" y="200.0" z="-300.0"></origin>
            <colour r="1.0" g="1.0" b="1.0"></colour>
        </light>
        <light>
            <origin x="-100.0" y="300.0" z="-400.0"></origin>
            <colour r="0.5" g="0.5" b="0.5">origin</colour>
        </light>
    </lights>
</world>

但是我得到了奇怪的结果，例如在File inputFile = new File(fileName); DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder dBuilder = dbFactory.newDocumentBuilder(); Document doc = dBuilder.parse(inputFile); doc.getDocumentElement().normalize(); Element rootEle = doc.getDocumentElement(); String resX = rootEle.getAttribute("x"); String resY = rootEle.getAttribute("y"); int width = Integer.parseInt(resX); int height = Integer.parseInt(resY); RayTracer.setWorld(width, height); NodeList nodes = rootEle.getChildNodes(); System.out.println(nodes.item(0).getNodeName()); Node sampler = nodes.item(1); String samplesTemp = sampler.getTextContent(); System.out.println(samplesTemp); int samples = Integer.parseInt(samplesTemp); RayTracer.setSampler(samples); Node camera = nodes.item(2);我得到了#text，我不知道它来自哪里。对于System.out.println(nodes.item(0).getNodeName());我得到了样本，item(1)我得到#text和item(2)我得到了相机。

Answer 1

如果您的xml格式与您的示例完全相同，例如

<world x="1920" y="1080">
    <samples>2</samples>
    ....
</world>

然后在开始标记#text和开始标记<world>之间有samples。在这种情况下，有一个换行符和四个空格。这是<world>之后的第一个节点。

也许你想要ignore the whitespaces。

XML解析在nodeList中获取#text的问题

1 个答案: