Java读取、创建xml（通过dom方式）

创建一个接口

XmlInterface.java

public interface XmlInterface {

		/** 
		* 建立XML文档 
		* @param fileName 文件全路径名称 
		*/ 
		public void createXml(String fileName); 
		/** 
		* 解析XML文档 
		* @param fileName 文件全路径名称 
		*/ 
		public void parserXml(String fileName); 
}

接口实现

XmlImpl.java

package com.test.xml;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
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.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class XmlImpl implements XmlInterface{
	private Document document;

	public void init() {
		try {
			DocumentBuilderFactory factory = DocumentBuilderFactory
					.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			this.document = builder.newDocument();
		} catch (ParserConfigurationException e) {
			System.out.println(e.getMessage());
		}
	}

	public void createXml(String fileName) {
		Element root = this.document.createElement("scores"); 
		this.document.appendChild(root); 
		Element employee = this.document.createElement("employee"); 
		Element name = this.document.createElement("name"); 
		name.appendChild(this.document.createTextNode("wangchenyang")); 
		employee.appendChild(name); 
		Element sex = this.document.createElement("sex"); 
		sex.appendChild(this.document.createTextNode("m")); 
		employee.appendChild(sex); 
		Element age = this.document.createElement("age"); 
		age.appendChild(this.document.createTextNode("26")); 
		employee.appendChild(age); 
		root.appendChild(employee); 
		TransformerFactory tf = TransformerFactory.newInstance();
		try {
			Transformer transformer = tf.newTransformer();
			DOMSource source = new DOMSource(document);
			transformer.setOutputProperty(OutputKeys.ENCODING, "gb2312");
			transformer.setOutputProperty(OutputKeys.INDENT, "yes");
			PrintWriter pw = new PrintWriter(new FileOutputStream(fileName));
			StreamResult result = new StreamResult(pw);
			transformer.transform(source, result);
			System.out.println("生成XML文件成功!");
		} catch (TransformerConfigurationException e) {
			System.out.println(e.getMessage());
		} catch (IllegalArgumentException e) {
			System.out.println(e.getMessage());
		} catch (FileNotFoundException e) {
			System.out.println(e.getMessage());
		} catch (TransformerException e) {
			System.out.println(e.getMessage());
		}
	}

	public void parserXml(String fileName) {
		try {
			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();
			Document document = db.parse(fileName);
			
			NodeList employees = document.getChildNodes();
			for (int i = 0; i < employees.getLength(); i++) {
				Node employee = employees.item(i);
				NodeList employeeInfo = employee.getChildNodes();
				for (int j = 0; j < employeeInfo.getLength(); j++) {
					Node node = employeeInfo.item(j);
					NodeList employeeMeta = node.getChildNodes();
					for (int k = 0; k < employeeMeta.getLength(); k++) {
						System.out.println(employeeMeta.item(k).getNodeName()
								+ ":" + employeeMeta.item(k).getTextContent());
					}
				}
			}
			System.out.println("解析完毕");
		} catch (FileNotFoundException e) {
			System.out.println(e.getMessage());
		} catch (ParserConfigurationException e) {
			System.out.println(e.getMessage());
		} catch (SAXException e) {
			System.out.println(e.getMessage());
		} catch (IOException e) {
			System.out.println(e.getMessage());
		}
	}
}

测试

public class Main {

	public static void main(String args[]){
		XmlImpl dd=new XmlImpl();
		String str="D:/grade.xml";
		dd.init();
		dd.createXml(str);    //创建xml
		dd.parserXml(str);    //读取xml
	}
}

结果

生成xml

<?xml version="1.0" encoding="GB2312"?>
<scores>
<employee>
<name>wangchenyang</name>
<sex>m</sex>
<age>26</age>
</employee>
</scores>

读取xml

生成XML文件成功!
#text:

name:wangchenyang
#text:

sex:m
#text:

age:26
#text:

解析完毕