Java:如何使用stax从xml获取特定信息

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

XMLInputFactory factory = XMLInputFactory.newInstance();
XMLStreamReader reader = factory.createXMLStreamReader(new FileInputStream("path/to/xml/file.xml"));

while (reader.hasNext()) {
    int event = reader.next();
    switch (event) {
        case XMLStreamConstants.START_ELEMENT:
            String elementName = reader.getLocalName();
            // 判断是否为目标元素
            if (elementName.equals("targetElement")) {
                // 获取目标元素的属性值
                String attributeValue = reader.getAttributeValue(null, "attributeName");
                // 获取目标元素的文本内容
                String textContent = reader.getElementText();
                // 处理获取到的信息
                // ...
            }
            break;
        case XMLStreamConstants.END_ELEMENT:
            // 处理结束元素
            // ...
            break;
    }
}