三种解析xml的方法

第一使用org.w3c.dom.Document类解析

    

package com.xml.dom;

import java.io.File;

import java.io.IOException;
import java.net.URL;

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

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

/**
 * @author 熊浪
 * @Email [email protected]
 * @Time 2017年10月17日 @此类的作用：
 */
public class DOMReaderXml {

	public String useDomReaderXML(String path, String key) throws IOException {
		URL url = this.getClass().getResource(path);// 生成path的url
		try {
			File file = new File(url.getFile());
			if (!file.exists()) {
				throw new IOException("文件不存在");
			}
			DocumentBuilderFactory documentFactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder doucmentBuilder = documentFactory.newDocumentBuilder();
			Document document = doucmentBuilder.parse(file);
			NodeList list = document.getElementsByTagName("value");
			for (int i = 0, len = list.getLength(); i < len; i++) {
				System.out.print(document.getElementsByTagName("name").item(i).getFirstChild().getNodeValue());
				System.out.print("\t");
				System.out.print(document.getElementsByTagName("namevalue").item(i).getFirstChild().getNodeValue());
				System.out.println();
			}
		} catch (ParserConfigurationException | SAXException e) {
			e.printStackTrace();
		}
		return key;
	}

	public static void main(String[] args) {
		try {
			new DOMReaderXml().useDomReaderXML("/META-INF/base.xml", "name");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

效果图：

第二种，使用org.jdom.Document解析

package com.xml.jdom;

import java.io.File;

import java.io.IOException;
import java.net.URL;
import java.util.List;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;

/**
 * @author 熊浪
 * @Email [email protected]
 * @Time 2017年10月17日 @此类的作用：
 */
@SuppressWarnings("unchecked")
public class JDOMReaderXml {
	public String useJDOMReadXML(String path, String key) throws IOException {
		URL url = this.getClass().getClassLoader().getResource(path);
		File file = new File(url.getFile());
		if (!file.exists()) {
			throw new IOException("文件不存在");
		}
		SAXBuilder saxBuilder = new SAXBuilder();
		try {
			Document document = saxBuilder.build(file);
			Element element = document.getRootElement();
			List<Element> list = element.getChildren();
			for (int i = 0, len = list.size(); i < len; i++) {
				System.out.print(list.get(i).getChildTextTrim("name"));
				System.out.print("\t");
				System.out.print(list.get(i).getChildTextTrim("namevalue"));
				System.out.println();
			}
		} catch (JDOMException e) {
			e.printStackTrace();
		}
		return key;
	}

	public static void main(String[] args) {
		try {
			new JDOMReaderXml().useJDOMReadXML("META-INF/base.xml", "name");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

第三种，使用org.dom4j.Document解析

package com.xml.sax;

import java.io.File;

import java.io.IOException;
import java.net.URL;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.xml.sax.helpers.DefaultHandler;

/**
 * @author 熊浪
 * @Email [email protected]
 * @Time 2017年10月17日 @此类的作用：
 */
@SuppressWarnings("unchecked")
public class SAXReaderXml extends DefaultHandler {
	public String useSAXReadXML(String path, String key) throws IOException {
		if (path.startsWith("/"))
			path = path.substring(1);
		URL url = this.getClass().getClassLoader().getResource(path);
		File file = new File(url.getFile());
		if (!file.exists()) {
			throw new IOException("文件不存在");
		}
		SAXReader saxReader = new SAXReader();
		try {
			Document document = saxReader.read(file);
			Element element = document.getRootElement();
			List<Element> list = element.elements();
			for (Element value : list) {
				List<Element> childs = value.elements();
				for (Element child : childs) {
					System.out.println(child.getName() + "\t" + child.getText());
				}
			}
		} catch (DocumentException e) {
			e.printStackTrace();
		}
		return key;
	}

	public static void main(String[] args) {
		try {
			new SAXReaderXml().useSAXReadXML("META-INF/base.xml", "name");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

效果图