w3c.dom 解析xml字符串

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

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.StringReader;

/**
 * xml字符串解析
 * */
public class xmlUtil {

    public static Document parseXml(String xmlStr) {
        Document document = null;
        try {
            DocumentBuilder builder = createDocumentBuilder();
            document = builder.parse(new InputSource(new StringReader(xmlStr)));
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return document;
    }

    public static DocumentBuilder createDocumentBuilder(){
        try {
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            dbf.setNamespaceAware(true);
            return dbf.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        }
        return null;
    }

	//測試
    public static void main(String args[]) {
        try {
            String xmlStr = "<employees>" +
                    "   <employee>" +
                    "      <name>張三</name>" +
                    "      <age>20</age>" +
                    "   </employee>" +
                    "   <employee>" +
                    "      <name>李四</name>" +
                    "      <age>30</age>" +
                    "   </employee>" +
                    "</employees>";
            Document document = parseXml(xmlStr);
            NodeList list = document.getElementsByTagName("name");
            for(int i=0;i<list.getLength();i++){
                System.out.println(list.item(i).getTextContent());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}