java实现解析XML的4种方式

1、DOM方式解析

package XMLParse;

import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

public class domXML {

//利用element方式

public static void element(NodeList list) {

for (int i = 0; i < list.getLength(); i++) {

Element element = (Element) list.item(i);

NodeList childNode = element.getChildNodes();

for (int j = 0; j < childNode.getLength(); i++) {

if (childNode.item(j).getNodeType() == Node.ELEMENT_NODE) {

//获取节点

System.out.print(childNode.item(j).getNodeName() + ":");

//获取节点数值

System.out.println(childNode.item(j).getFirstChild().getNodeValue());

}

public static void node(NodeList list) {

for (int i = 0; i < list.getLength(); i++) {

Node node = list.item(i);

NodeList childNodes = node.getChildNodes();

for (int j = 0; j < childNodes.getLength(); j++) {

if (childNodes.item(j).getNodeType() == Node.ELEMENT_NODE) {

System.out.print(childNodes.item(j).getNodeName() + ": ");

System.out.println(childNodes.item(j).getFirstChild().getNodeValue());

}

public static void main(String[] args) {

//创建这个对象

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

//创建下面这个对象

try {

DocumentBuilder builder = factory.newDocumentBuilder();

Document document = builder.parse("src/XMLParse/test.xml");

NodeList list = document.getElementsByTagName("student");

node(list);

} catch (Exception e) {

e.printStackTrace();

}

2、SAX方式解析

package XMLParse;

import org.xml.sax.Attributes;

import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

public class saxXML {

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

//获取sax实例对象

SAXParserFactory factory = SAXParserFactory.newInstance();

//获取SAXParse实例

SAXParser saxParser = factory.newSAXParser();

//创建handle对象

SAXDemoHandel handel = new SAXDemoHandel();

saxParser.parse("src/XMLParse/test.xml", handel);

}

class SAXDemoHandel extends DefaultHandler {

//遍历XML文件开始的标签

@Override

public void startDocument() throws SAXException {

super.startDocument();

System.out.println("sax解析开始...");

}

//遍历XML文件结束标签

@Override

public void endDocument() throws SAXException {

super.endDocument();

System.out.println("sax解析结束...");

}

@Override

public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

super.startElement(uri, localName, qName, attributes);

if (qName.equals("student")) {

System.out.println("===开始遍历student===");

} else if (!qName.equals("student") && !qName.equals("class")) {

System.out.println("节点名称:" + qName + "----");

}

@Override

public void endElement(String uri, String localName, String qName) throws SAXException {

super.endElement(uri, localName, qName);

if (qName.equals("student")) {

System.out.println(qName + "遍历结束");

System.out.println("===结束遍历student===");

}

@Override

public void characters(char[] ch, int start, int length) throws SAXException {

super.characters(ch, start, length);

String value = new String(ch, start, length).trim();

if (!value.equals("")) {

System.out.println(value);

}

3、JDOM方式解析

package XMLParse;

import sun.plugin.dom.core.Document;

import sun.plugin.dom.core.Element;

import javax.print.attribute.Attribute;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream;

import java.util.List;

/**

* @Author: mac

* JDom解析xml

* 快速开发XML应用程序。

* 是一个开源项目

* JDOM主要用来弥补DOM和SAX在实际应用当中的不足。

public class JDomDemo {

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

//1.创建SAXBuilder对象

SAXBuilder saxBuilder = new SAXBuilder();

//2.创建输入流

InputStream is = new FileInputStream(new File("src/main/resources/demo.xml"));

//3.将输入流加载到build中

Document document = saxBuilder.build(is);

//4.获取根节点

Element rootElement = document.getRootElement();

//5.获取子节点

List<Element> children = rootElement.getChildren();

for (Element child : children) {

System.out.println("通过rollno获取属性值:" + child.getAttribute("rollno"));

List<Attribute> attributes = (List<Attribute>) child.getAttributes();

//打印属性

for (Attribute attr : attributes) {

System.out.println(attr.getName() + ":" + attr.getValue());

}

List<Element> childrenList = child.getChildren();

System.out.println("======获取子节点-start======");

for (Element o : childrenList) {

System.out.println("节点名:" + o.getName() + "---" + "节点值:" + o.getValue());

}

System.out.println("======获取子节点-end======");

}

4、Dom4j方式解析

import org.dom4j.Attribute;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.io.SAXReader;

import java.io.File;

import java.util.Iterator;

import java.util.List;

/**

* @Author: cxx

* Dom4j解析xml

* @Date: 2018/5/30 12:21

public class Dom4JDemo {

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

//1.创建Reader对象

SAXReader reader = new SAXReader();

//2.加载xml

Document document = reader.read(new File("src/main/resources/demo.xml"));

//3.获取根节点

Element rootElement = document.getRootElement();

Iterator iterator = rootElement.elementIterator();

while (iterator.hasNext()){

Element stu = (Element) iterator.next();

List<Attribute> attributes = stu.attributes();

System.out.println("======获取属性值======");

for (Attribute attribute : attributes) {

System.out.println(attribute.getValue());

}

System.out.println("======遍历子节点======");

Iterator iterator1 = stu.elementIterator();

while (iterator1.hasNext()){

Element stuChild = (Element) iterator1.next();

System.out.println("节点名："+stuChild.getName()+"---节点值："+stuChild.getStringValue());

}

from:https://blog.csdn.net/qq_42544728/article/details/125913216

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