利用Java语言解析xml文件

package dom4j;

import org.dom4j.*;
import org.dom4j.io.*;
import Java.util.*;
import java.io.*;

public class ReadXml {

  public static void main(String args[]) throws DocumentException {
    String fileName =
      "src/dom4j/book.xml";
    ReadXml test = new ReadXml();
    //获得Document对象
    Document doc = test.read(fileName);
    //获得根元素
    Element root = test.getRootElement(doc);
    //遍历根元素下的计算机书籍
    test.list(root);
  }

  // 从文件读取XML，输入文件名，返回XML文档
  public Document read(String fileName)
  throws DocumentException {
    SAXReader reader = new SAXReader();
    Document document =
      reader.read(new File(fileName));
    return document;
  }

  public Element getRootElement(Document doc) {
    return doc.getRootElement();
  }

  public void list(Element root) {
    // 遍历名称为计算机书籍的节点
    for (Iterator i =
      root.elementIterator("计算机书籍");
    i.hasNext();) {
      Element book = (Element) i.next();
      // 遍历计算机书籍的属性
      for (Iterator it =
        book.attributeIterator();
      it.hasNext();) {
        Attribute attribute =
          (Attribute) it.next();
        System.out.println(
            attribute.getName()
            + ":" + attribute.getValue());
      }

      System.out.println(book.elementText("书名"));
      System.out.println(book.elementText("价格"));
      System.out.println(book.elementText("作者"));

      // 遍历计算机书籍的子节点“作者”的属性
      for (Iterator it =
        book.element("作者").attributeIterator();
      it.hasNext();) {
        Attribute attribute =
          (Attribute) it.next();
        System.out.println(attribute.getName()
            + ":" + attribute.getValue());
      }
      System.out.println(book.elementText("简介"));
    }
  }

}