首先得到:得到
DOM
解析器的工厂实例
DocumentBuilderFactory domfac=DocumentBuilderFactory.newInstance();
然后从
DOM
工厂获得
DOM
解析器
DocumentBuilder dombuilder=domfac.newDocumentBuilder();
3
)把要解析的
XML
文档转化为输入流,以便
DOM
解析器解析它
InputStream is=
new
FileInputStream("test1.xml");
(
4
)解析
XML
文档的输入流,得到一个
Document
Document doc=dombuilder.parse(is);
(
5
)得到
XML
文档的根节点
Element root=doc.getDocumentElement();
(
6
)得到节点的子节点
NodeList books=root.getChildNodes();
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)取得节点的属性值
String email=book.getAttributes().getNamedItem("email").getNodeValue();
System.out.println(email);
//注意,节点的属性也是它的子节点。它的节点类型也是Node.ELEMENT_NODE
//(8)轮循子节点
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();
}
}
}
<?xml version="1.0" encoding="GB2312" standalone="no"?>
<books>
<book email="zhoujunhui">
<name>rjzjh</name>
<price>jjjjjj</price>
</book>
</books>
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