Java:DocumentBuilderFactory調(diào)用XML的方法實(shí)例

更新時(shí)間：2013年04月16日 10:28:48 作者：

Java:DocumentBuilderFactory調(diào)用XML的方法實(shí)例，需要的朋友可以參考一下

首先得到：得到 DOM 解析器的工廠實(shí)例 DocumentBuilderFactory domfac=DocumentBuilderFactory.newInstance();

然后從 DOM 工廠獲得 DOM 解析器

DocumentBuilder dombuilder=domfac.newDocumentBuilder();

）把要解析的 XML 文檔轉(zhuǎn)化為輸入流，以便 DOM 解析器解析它

InputStream is= new FileInputStream("test1.xml");

（ 4 ）解析 XML 文檔的輸入流，得到一個(gè) Document

Document doc=dombuilder.parse(is);

（ 5 ）得到 XML 文檔的根節(jié)點(diǎn)

Element root=doc.getDocumentElement();

（ 6 ）得到節(jié)點(diǎn)的子節(jié)點(diǎn)

NodeList books=root.getChildNodes();

復(fù)制代碼代碼如下:

package com.st.demo;   

import java.io.File;   
import java.io.FileInputStream;   
import java.io.InputStream;   

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;   

public class XmlReader {   
    public static void main(String[] args) {   
        XmlReader reader = new XmlReader();   
    }   
    public XmlReader(){   
        DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();   
        try {   
            DocumentBuilder domBuilder = domfac.newDocumentBuilder();   
            InputStream is = new FileInputStream(new File("D:/test1.xml"));   
            Document doc = domBuilder.parse(is);   
            Element root = doc.getDocumentElement();   
            NodeList books = root.getChildNodes();   
            if(books!=null){   
                for (int i = 0; i < books.getLength(); i++) {   
                    Node book = books.item(i);   
                     if(book.getNodeType()==Node.ELEMENT_NODE) {   
                            //（7）取得節(jié)點(diǎn)的屬性值   
                            String email=book.getAttributes().getNamedItem("email").getNodeValue();   
                            System.out.println(email);   
                            //注意，節(jié)點(diǎn)的屬性也是它的子節(jié)點(diǎn)。它的節(jié)點(diǎn)類(lèi)型也是Node.ELEMENT_NODE   
                            //（8）輪循子節(jié)點(diǎn)   
                            for(Node node=book.getFirstChild();node!=null;node=node.getNextSibling()) {   
                                if(node.getNodeType()==Node.ELEMENT_NODE) {   
                                    if(node.getNodeName().equals("name")) {   
                                        String name=node.getNodeValue();   
                                        String name1=node.getFirstChild().getNodeValue();   
                                        System.out.println(name);   
                                        System.out.println(name1);   
                                    }   
                                    if(node.getNodeName().equals("price")) {   
                                        String price=node.getFirstChild().getNodeValue();   
                                        System.out.println(price);   
                                    }   
                                }   
                            }   
                     }   
                }   
            }   
        } catch (Exception e) {   
            // TODO Auto-generated catch block   
            e.printStackTrace();   
        }   

    }   
}  