JavaWeb学习笔记——XML解析

DOM解析操作

只在跟节点<addresslist>下面建立一个子节点<name>

<?xml version="1.0" encoding="UTF-8"?>
<addresslist>
	<linkman>
		<name>张三</name>
		<email>www.baidu.com</email>
	</linkman>

	<linkman>
		<name>李四</name>
		<email>www.sina.com</email>
	</linkman>
</addresslist>

import java.io.IOException;

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

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

//=================================================
// File Name       :	DOM_demo
//------------------------------------------------------------------------------
// Author          :	Common

//类名：BinarySearch_Find
//属性：
//方法：

//主类
//Function        : 	DOM_demo
public class DOM_demo {

	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	//建立DocumentBuilderFactory
		DocumentBuilder builder = factory.newDocumentBuilder();		//建立DocumentBuilder
		Document doc = null;
		try{
			doc = builder.parse("/home/common/software/coding/HelloWord/JavaWeb/bin/dom_name.xml");
		}catch(SAXException e){
			e.printStackTrace();
		}catch(IOException e){
			e.printStackTrace();
		}
		NodeList nl = doc.getElementsByTagName("name");		//查找name节点
		System.out.println("姓名："+nl.item(1).getFirstChild().getNodeValue());		//输出第1个节点的内容
	}

}

一些DOM操作，循环输出节点信息

import java.io.IOException;

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

import org.w3c.dom.Element;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

//=================================================
// File Name       :	DOM_demo
//------------------------------------------------------------------------------
// Author          :	Common

//类名：BinarySearch_Find
//属性：
//方法：

//主类
//Function        : 	DOM_demo
public class DOM_demo {

	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();	//建立DocumentBuilderFactory
		DocumentBuilder builder = factory.newDocumentBuilder();		//建立DocumentBuilder
		Document doc = null;
		try{
			doc = builder.parse("/home/common/software/coding/HelloWord/JavaWeb/bin/dom_name.xml");
		}catch(SAXException e){
			e.printStackTrace();
		}catch(IOException e){
			e.printStackTrace();
		}

//		NodeList nl = doc.getElementsByTagName("name");		//查找name节点
//		System.out.println("姓名："+nl.item(1).getFirstChild().getNodeValue());		//输出第1个节点的内容

		NodeList lm = doc.getElementsByTagName("linkman");		//查找linkman节点
		for(int i=0;i<lm.getLength();i++){
			Element e = (Element)lm.item(i);		//取得每一个元素
			System.out.println("姓名："+e.getElementsByTagName("name").item(0).getFirstChild().getNodeValue());
			System.out.println("邮箱："+e.getElementsByTagName("email").item(0).getFirstChild().getNodeValue());
		}
	}

}

生成XML文件

import java.io.File;
import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;

//=================================================
// File Name       :	DOM_demo
//------------------------------------------------------------------------------
// Author          :	Common

//类名：BinarySearch_Find
//属性：
//方法：

//主类
//Function        : 	DOM_demo
public class DOM_demo {

	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		//建立DocumentBuilderFactory
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		//建立DocumentBuilder
		DocumentBuilder builder = factory.newDocumentBuilder();
		//定义Document接口对象，通过DocumentBuilder类进行DOM树的转换操作
		Document doc = null;
		doc = builder.newDocument();

		//建立各个操作节点
		Element addresslist = doc.createElement("addresslist");
		Element linkman = doc.createElement("linkman");
		Element name = doc.createElement("name");
		Element email = doc.createElement("email");
		//设置节点的文本内容，即为每一个节点添加文本节点
		name.appendChild(doc.createTextNode("王五"));
		email.appendChild(doc.createTextNode("www.soho.com"));
		//设置节点关系
		linkman.appendChild(name);					//子节点
		linkman.appendChild(email);					//子节点
		addresslist.appendChild(linkman);		//子节点
		doc.appendChild(addresslist);				//文档上保存节点
		//输出文档到文件中
		TransformerFactory tf = TransformerFactory.newInstance();
		Transformer t = null;
		try{
			t = tf.newTransformer();
		}catch(TransformerConfigurationException e1){
			e1.printStackTrace();
		}
		t.setOutputProperty(OutputKeys.ENCODING, "UTF-8");		//设置编码
		DOMSource source = new DOMSource(doc);							//输出文档
		StreamResult result = new StreamResult(new File("/home/common/software/coding/HelloWord/JavaWeb/bin/dom_name_output.xml")) ;
		try{
			t.transform(source, result); 					//输出
		}catch(TransformerException e){
			e.printStackTrace();
		}
	}

}