package?com.test;

public?class?Book?{
	private?String?id;
	private?String?name;
	private?String?author;
	private?String?year;
	private?String?price;
	private?String?language;
	
	@Override
	public?String?toString()?{
		return?("id->"+id+"\nname->"+name+"\nauthor->"+author+"\nyear->"+year+"\nprice->"+price+"\nlanguage->"+language);
	}
	
	public?String?getId()?{
		return?id;
	}
	public?void?setId(String?id)?{
		this.id?=?id;
	}
	public?String?getName()?{
		return?name;
	}
	public?void?setName(String?name)?{
		this.name?=?name;
	}
	public?String?getAuthor()?{
		return?author;
	}
	public?void?setAuthor(String?author)?{
		this.author?=?author;
	}
	public?String?getYear()?{
		return?year;
	}
	public?void?setYear(String?year)?{
		this.year?=?year;
	}
	public?String?getPrice()?{
		return?price;
	}
	public?void?setPrice(String?price)?{
		this.price?=?price;
	}
	public?String?getLanguage()?{
		return?language;
	}
	public?void?setLanguage(String?language)?{
		this.language?=?language;
	}

}

package?com.test;
import?java.io.FileInputStream;
import?java.io.IOException;
import?java.util.ArrayList;
import?java.util.List;
import?org.jdom2.Attribute;
import?org.jdom2.Document;
import?org.jdom2.Element;
import?org.jdom2.JDOMException;
import?org.jdom2.input.SAXBuilder;
public?class?JDOMTest?{
private?static?List<Book>?books?=?new?ArrayList<Book>();
public?static?void?main(String[]?args)?{
SAXBuilder?saxBuilder?=?new?SAXBuilder();
try?{
Document?document?=?saxBuilder.build(new?FileInputStream("src/res/books.xml"));
//根節(jié)點(diǎn)
Element?rootElement?=?document.getRootElement();
//子節(jié)點(diǎn)
List<Element>?bookList?=?rootElement.getChildren();
for?(Element?element?:?bookList)?{
Book?book?=new?Book();
System.out.println("開始解析第"?+?(bookList.indexOf(element)+1)+"本書");
List<Attribute>?attrList?=?element.getAttributes();
for?(Attribute?attr?:?attrList)?{
System.out.println(attr.getName()+"->"+attr.getValue());
if(attr.getName().equals("id")){
book.setId(attr.getValue());
}
}
List<Element>?bookChilds?=?element.getChildren();
for?(Element?child?:?bookChilds)?{
System.out.println(child.getName()+"->"+child.getValue());
switch?(child.getName())?{
case?"name":
book.setName(child.getValue());
break;
case?"author":
book.setAuthor(child.getValue());
break;
case?"year":
book.setYear(child.getValue());
break;
case?"price":
book.setPrice(child.getValue());
break;
case?"language":
book.setLanguage(child.getValue());
break;
default:
break;
}
}
books.add(book);
book=null;
System.out.println("--------------------------------------");
}
for?(Book?book?:?books)?{
System.out.println(book.toString());
System.out.println("--------------------------------------");
}
System.out.println();
}?catch?(JDOMException?|?IOException?e)?{
e.printStackTrace();
}
}
}

我也有時(shí)就是跟著老師一步敲代碼，但確實(shí)會(huì)出現(xiàn)錯(cuò)誤，所以我建議你把代碼復(fù)制上來，才可以真正的找到解決問題的方法！

我試過了，老師的代碼沒有問題，你可以到資料下載的位置把源代碼下載下來，認(rèn)真比對(duì)一下，看看是什么地方出了問題。

代碼呢？