Question

我有一个简单的XML文件：

`<?xml: version = "1.0" ?>
<Company>
    <Employee category = "technical">
        <FirstName>John</FirstName>
        <LastName>Doe</LastName>
        <ContactNo>123456789</ContactNo>
    </Employee>
    <Employee category = "non-technical">
        <FirstName>Jane</FirstName>
        <LastName>Doe</LastName>
        <ContactNo>1234567898</ContactNo>
    </Employee>
</Company>`

现在，我必须使用StAX解析XML，但无法获取属性。我的代码是：

 `public static void main(String[] args) throws XMLStreamException, FileNotFoundException {
    XMLInputFactory xmlif = XMLInputFactory.newFactory();
    Reader reader = new FileReader("Company.txt");
    XMLStreamReader xmlsr = xmlif.createXMLStreamReader(reader);
    while (xmlsr.hasNext()) {
        switch (xmlsr.next()) {
            case XMLStreamReader.START_ELEMENT:
                System.out.println("START_ELEMENT");
                System.out.println("Qname:" + xmlsr.getName());
                break;
            case XMLStreamReader.END_ELEMENT:
                System.out.println("END_ELEMENT");
                System.out.println("Qname:" + xmlsr.getName());
        }

    }
}`

当我开始阅读元素时，必须使用简单的IF函数检查元素中是否具有属性。如果它具有属性，我将使用：

 for (int i = 0; i < xmlsr.getAttributeCount(); i++) {
String attributeName = xmlsr.getAttributeLocalName(i);
String attributeValue = xmlsr.getAttributeValue(i);
System.out.println("Attribute value for " + attributeName + " = " + attributeValue);
}

但是，我不知道将IF函数放在哪里以及如何检查它。请有人可以插入IF函数的代码。谢谢...

Answer 1

已经有一段时间了，所以希望您自己得到答案：D

但是，如果您没有，这些属性将存储在START_ELEMENT中。这意味着添加属性打印代码的正确位置在case XMLStreamReader.START_ELEMENT中，如下所示。

public static void main(String[] args) throws XMLStreamException, FileNotFoundException {
        XMLInputFactory xmlif = XMLInputFactory.newFactory();
        Reader reader = new FileReader("Company.txt");
        XMLStreamReader xmlsr = xmlif.createXMLStreamReader(reader);
        while (xmlsr.hasNext()) {
            switch (xmlsr.next()) {
                case XMLStreamReader.START_ELEMENT:
                    System.out.println("START_ELEMENT");
                    System.out.println("Qname:" + xmlsr.getName());

                    int numberOfAttributes = xmlsr.getAttributeCount();
                    if (numberOfAttributes > 0) {
                        for (int i = 0; i < numberOfAttributes; i++) {
                            String attributeName = xmlsr.getAttributeLocalName(i);
                            String attributeValue = xmlsr.getAttributeValue(i);
                            System.out.println("Attribute value for " + attributeName + " = " + attributeValue);
                        }
                    }

                    break;
                case XMLStreamReader.END_ELEMENT:
                    System.out.println("END_ELEMENT");
                    System.out.println("Qname:" + xmlsr.getName());
                    break;
            }

        }
    }

无法使用StAX

1 个答案: