输出和老师不一样。。新手求教
最后的get为什么两本书就是0.。。还有我的输出为什么是 1 1 null 和 2 1 null
5 回答
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"));
//根节点
Element rootElement = document.getRootElement();
//子节点
List<Element> bookList = rootElement.getChildren();
for (Element element : bookList) {
Book book =new Book();
System.out.println("开始解析第" + (bookList.indexOf(element)+1)+"本书");
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();
}
}
}
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