Java解析XML文件

 

<?xml version=“1.0” encoding=“UTF-8”?>  
<bookstore>  
    <book id=“1”>  
        <name>冰与火之歌</name>  
        <author>乔治马丁</author>  
        <year>2014</year>  
        <price>89</price>  
    </book>  
    <book id=“2”>  
        <name>安徒生童话</name>  
        <author>安徒生</author>  
        <year>2004</year>  
        <price>77</price>  
    </book>  
    <book id=“3”>  
        <name>think think think</name>  
        <author>aaa</author>  
        <year>1997</year>  
        <price>100</price>  
    </book>  
</bookstore>  

public class Book {  
      
    /** 
     * @author lune 
     */  
      
    private int id;  
    private String name;  
    private String author;  
    private int year;  
    private double price;  
      
    /** 
     * @return the id 
     */  
    public int getId() {  
        return id;  
    }  
    /** 
     * @param id the id to set 
     */  
    public void setId(int id) {  
        this.id = id;  
    }  
    /** 
     * @return the name 
     */  
    public String getName() {  
        return name;  
    }  
    /** 
     * @param name the name to set 
     */  
    public void setName(String name) {  
        this.name = name;  
    }  
    /** 
     * @return the author 
     */  
    public String getAuthor() {  
        return author;  
    }  
    /** 
     * @param author the author to set 
     */  
    public void setAuthor(String author) {  
        this.author = author;  
    }  
    /** 
     * @return the year 
     */  
    public int getYear() {  
        return year;  
    }  
    /** 
     * @param year the year to set 
     */  
    public void setYear(int year) {  
        this.year = year;  
    }  
    /** 
     * @return the price 
     */  
    public double getPrice() {  
        return price;  
    }  
    /** 
     * @param price the price to set 
     */  
    public void setPrice(double price) {  
        this.price = price;  
    }  
      
    @Override  
    public String toString() {  
        return “Book [id=” + id + “, name=” + name + “, author=” + author + “, year=” + year + “, price=” + price + “]”;  
    }  
          
}  

1.JDOM方式解析XML

import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.io.IOException;  
import java.util.ArrayList;  
import java.util.List;  
  
import org.jdom2.JDOMException;  
import org.jdom2.input.SAXBuilder;  
  
import com.lune.bean.Book;  
  
import org.jdom2.*;  
  
/** 
 * 用JDOM方式读取xml文件 
 * @author lune 
 */  
public class ReadXMLByJDom {  
      
    private List<Book> books = null;  
    private Book book = null;  
      
    public List<Book> getBooks(String fileName){  
        SAXBuilder saxBuilder = new SAXBuilder();  
        try {  
            Document document = saxBuilder.build(new FileInputStream(fileName));  
            //获取根节点bookstore  
            Element rootElement = document.getRootElement();  
            //获取根节点的子节点，返回子节点的数组  
            List<Element> bookList = rootElement.getChildren();  
            books = new ArrayList<Book>();  
            for(Element bookElement : bookList){  
                book = new Book();  
                //获取bookElement的属性  
                List<Attribute> bookAttributes = bookElement.getAttributes();  
                for(Attribute attribute : bookAttributes){  
                    if(attribute.getName().equals(“id”)){  
                        String id = attribute.getValue(); //System.out.println(id);  
                        book.setId(Integer.parseInt(id));  
                    }  
                }  
                //获取bookElement的子节点  
                List<Element> children = bookElement.getChildren();  
                for(Element child : children){  
                    if(child.getName().equals(“name”)){  
                        String name = child.getValue();//System.out.println(name);  
                        book.setName(name);  
                    }else if(child.getName().equals(“author”)){  
                        String author = child.getValue();  
                        book.setAuthor(author);//System.out.println(author);  
                    }else if(child.getName().equals(“year”)){  
                        String year = child.getValue();  
                        book.setYear(Integer.parseInt(year));  
                    }else if(child.getName().equals(“price”)){  
                        String price = child.getValue();  
                        book.setPrice(Double.parseDouble(price));  
                    }  
                      
                }  
                  
                books.add(book);  
                book = null;  
                  
            }  
              
        } catch (FileNotFoundException e) {  
              
            e.printStackTrace();  
        } catch (JDOMException e) {  
              
            e.printStackTrace();  
        } catch (IOException e) {  
              
            e.printStackTrace();  
        }  
          
        return books;  
          
    }  
  
      
    public static void main(String[] args) {  
        // TODO Auto-generated method stub  
        String fileName = ”src/res/books.xml”;  
        List<Book> books= new ReadXMLByJDom().getBooks(fileName);  
        for(Book book : books){  
            System.out.println(book);  
        }  
    }  
  
}  

2.DOM4j方式解析XML

import java.io.File;  
import java.util.ArrayList;  
import java.util.Iterator;  
import java.util.List;  
  
import org.dom4j.Attribute;  
import org.dom4j.Document;  
import org.dom4j.DocumentException;  
import org.dom4j.Element;  
import org.dom4j.io.SAXReader;  
  
import com.lune.bean.Book;  
  
/** 
 * 用DOM4J方法读取xml文件 
 * @author lune 
 */  
public class ReadXMLByDom4j {  
      
    private List<Book> bookList = null;  
    private Book book = null;  
      
    public List<Book> getBooks(File file){  
          
        SAXReader reader = new SAXReader();  
        try {  
            Document document = reader.read(file);  
            Element bookstore = document.getRootElement();  
            Iterator storeit = bookstore.elementIterator();  
              
            bookList = new ArrayList<Book>();  
            while(storeit.hasNext()){  
                  
                book = new Book();  
                Element bookElement = (Element) storeit.next();  
                //遍历bookElement的属性  
                List<Attribute> attributes = bookElement.attributes();  
                for(Attribute attribute : attributes){  
                    if(attribute.getName().equals(“id”)){  
                        String id = attribute.getValue();//System.out.println(id);  
                        book.setId(Integer.parseInt(id));  
                    }  
                }  
                  
                Iterator bookit = bookElement.elementIterator();  
                while(bookit.hasNext()){  
                    Element child = (Element) bookit.next();  
                    String nodeName = child.getName();  
                    if(nodeName.equals(“name”)){  
                        //System.out.println(child.getStringValue());  
                        String name = child.getStringValue();  
                        book.setName(name);  
                    }else if(nodeName.equals(“author”)){  
                        String author = child.getStringValue();  
                        book.setAuthor(author);  
                    }else if(nodeName.equals(“year”)){  
                        String year = child.getStringValue();  
                        book.setYear(Integer.parseInt(year));  
                    }else if(nodeName.equals(“price”)){  
                        String price = child.getStringValue();  
                        book.setPrice(Double.parseDouble(price));  
                    }  
                }  
                bookList.add(book);  
                book = null;  
                  
            }  
        } catch (DocumentException e) {  
          
            e.printStackTrace();  
        }  
          
          
        return bookList;  
          
    }  
      
  
    /** 
     * @param args 
     */  
    public static void main(String[] args) {  
        // TODO Auto-generated method stub  
        File file = new File(“src/res/books.xml”);  
        List<Book> bookList = new ReadXMLByDom4j().getBooks(file);  
        for(Book book : bookList){  
            System.out.println(book);  
        }  
    }  
  
}  

转载自：https://blog.csdn.net/zflovecf/article/details/78908788#