我对使用Java的XML处理相对较新,所以期待一些错误,但无论如何......我正在尝试解析以下XML数据:
http://msdn.microsoft.com/en-us/library/ms762271(v=vs.85).aspx
我想使用一个函数来实现这一点,其中XML标记和NodeList的名称作为参数传入,并返回内容。
感谢。
import java.io.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
public class Files {
@SuppressWarnings("unused")
public static void main (String [] args) throws IOException, ParserConfigurationException, SAXException{
String address = "/home/leo/workspace/Test/Files/src/file.xml";
String author = "author";
String title = "title";
String genre = "genre";
String price = "price";
String publish = "publish_date";
String descr = "description";
File xmlFile = new File(address);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = factory.newDocumentBuilder();
Document doc = dBuilder.parse(xmlFile);
doc.getDocumentElement().normalize();
System.out.println(doc.getDocumentElement().getNodeName());
NodeList n = doc.getElementsByTagName("book");
System.out.println("Number of books " + n.getLength());
getElement(author, n);
}
private static void getElement(String elementName, NodeList n){
for (int i = 0; i < n.getLength(); i++){
Node showNode = n.item(i);
Element showElement = (Element)showNode;
System.out.println(elementName + ": " +
showElement.getAttribute(elementName)
);
}
}
}
答案 0 :(得分:1)
问题是:showElement.getAttribute(elementName)
要获取节点的值,但getAttribute是获取节点的属性,您应该弄清楚XML中的属性含义。
你可以得到这样的价值:
private static void getElement(String elementName, NodeList n){
for (int i = 0; i < n.getLength(); i++){
Node showNode = n.item(i);
NodeList nl = showNode.getChildNodes();
for(int j=0;j<nl.getLength();j++)
{
Node nd=nl.item(j);
if(nd.getNodeName().equals(elementName))
{
System.out.println(elementName + ":" + nd.getTextContent());
}
}
}
}
}