DOM解析XML

jzwlove 发表于 2016-12-29 01:35

本帖最后由 jzwlove 于 2016-12-29 01:46 编辑

解析一个book.xml内容为<?xml version="1.0" encoding="UTF-8"?>
<books>
   <book id="0001">
            <title>水浒传</title>
            <price>1220.58</price>
   </book>
   <book id="0002">
            <title>西游记</title>
            <price>2128.58</price>
   </book>
</books>

创建的Book的javaBean类
package cn.java9.beans;

public class Book {
   private String id;
   private String title;
   private double price;

   public String getId() {
            return id;
   }

   public void setId(String id) {
            this.id = id;
   }

   public String getTitle() {
            return title;
   }

   public void setTitle(String title) {
            this.title = title;
   }

   public double getPrice() {
            return price;
   }

   public void setPrice(double price) {
            this.price = price;
   }

   public Book(String id, String title, double price) {
            this.id = id;
            this.title = title;
            this.price = price;
   }

   public Book() {

   }

   @Override
   public String toString() {
            return "Book ";
   }

}

解析开始
package cn.java9.xml;

import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import cn.java9.beans.Book;

public class DomDemo01 {
   public static void main(String[] args) throws Exception {

            getAllBook();

   }

   public static List<Book> getAllBook() throws Exception {
            List<Book> bookList = new ArrayList<Book>();

            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder documentBuilder = factory.newDocumentBuilder();
            Document doc = documentBuilder.parse("books.xml");
            NodeList nodes = doc.getElementsByTagName("book");
            for (int i = 0; i < nodes.getLength(); i++) {
                     Book book = new Book();
                     Node node = nodes.item(i);
                     Element ele = (Element) node;
                     String id = ele.getAttribute("id");
                     book.setId(id);

                     NodeList childNodes = node.getChildNodes();
                     for (int j = 0; j < childNodes.getLength(); j++) {
                           Node childNode = childNodes.item(j);
                           String nodeName = childNode.getNodeName();
                           if ("title".equals(nodeName)) {
                                    String title = childNode.getTextContent();
                                    book.setTitle(title);

                           }
                           if ("price".equals(nodeName)) {
                                    double price = Double.parseDouble(childNode
                                                   .getTextContent());
                                    book.setPrice(price);

                           }

                     }
                     bookList.add(book);
            }

            System.out.println(bookList);
            return bookList;
   }
}

psx1lin 发表于 2016-12-29 08:27

收藏
參考一下
3q

haking 发表于 2016-12-29 09:26

一般这种东西我都会用正则来做，代码量一下子少了N多。。。

屌絲钕 发表于 2016-12-29 09:31

jackfang 发表于 2016-12-29 10:57

谢谢分享！！！

cqyisbug 发表于 2017-1-2 12:52

解析xml我一般用xstream,xml转obj或者obj转xml都可以,比较方便.

52gta 发表于 2017-1-4 20:37

DOM解析大数据不行啊===

messyidea 发表于 2017-1-5 17:04

这类工作我一般喜欢用python写，哈哈～

A.Thousand.Suns 发表于 2017-1-18 17:08

推荐学习，但是我个人是最不喜欢DOM的，不是麻烦，而是API很怪

页: [1]

吾爱破解 - 52pojie.cn's Archiver

DOM解析XML