跟着老师一起打的。对过了

package com.imooc.jdomtest;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.util.List;

import org.jdom2.Document;

import org.jdom2.Element;

import org.jdom2.JDOMException;

import org.jdom2.input.SAXBuilder;

public class JDOMTest {

public static void main(String[] args) {

//进行对books.xml文件的JDOM解析

//1.创建一个SAXBuilder对象

SAXBuilder saxBuilder = new SAXBuilder();

InputStream in;

try {

//2.创建一个输入流，将XML文件加载到输入流

in = new FileInputStream("src/res/books.xml");

//3.通过saxBuilder的build方法，将输入流加载到saxBuilder中

Document document = saxBuilder.build(in);

//4.通过document对象获取xml文件的根节点

Element rootElement = document.getRootElement();

//5.获取根节点下的子节点的List集合

   List<Element> bookList = rootElement.getChildren();

   //6.继续进行解析

   for (Element book : bookList) {

   System.out.println("开始解析第"+(bookList.indexOf(book)+1)+"本书=========");

   System.out.println("结束解析第"+(bookList.indexOf(book)+1)+"本书=========");

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (JDOMException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

异常如下：

Exception in thread "main" java.lang.NoClassDefFoundError: org/jdom2/JDOMException

Caused by: java.lang.ClassNotFoundException: org.jdom2.JDOMException