java 在dom4j中，使用XPath处理XML（主要对命名空间的处理）

java中使用dom4j对带有命名空间的xml文件进行解析

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.XPath;

import java.util.*;

/**
*  Java解析XML元素
*/
public class XML {

    //要测试的xml对象,带有命名空间
    static String str = "<rsiq to=\"378\" type=\"result\" from=\"12345678#[email protected]/cti\">" +
                "<query xmlns=\"http://te.com/resource/cti/getonlineseat\">" +
                "<telephone>12345678</telephone>" +
                "<session-id>20130328155409100477</session-id>" +
                "<workgroup><groupname>66666</groupname><seats/></workgroup><workgroup><groupname>888</groupname><seats/></workgroup>" +
                "<workgroup><groupname>test</groupname><seats>" +
                "<seat><jid>378</jid><name>地方</name><seatnumber>378</seatnumber></seat>" +
                "</seats></workgroup></query></rsiq>";
    //要测试的xml对象,没有命名空间
    static String str1 = "<rsiq to=\"378\" type=\"result\" from=\"12345678#[email protected]/cti\">" +
                "<query >" +
                "<telephone>12345678</telephone>" +
                "<session-id>20130328155409100477</session-id>" +
                "<workgroup><groupname>66666</groupname><seats/></workgroup><workgroup><groupname>888</groupname><seats/></workgroup>" +
                "<workgroup><groupname>test</groupname><seats>" +
                "<seat><jid>378</jid><name>地方</name><seatnumber>378</seatnumber></seat>" +
                "</seats></workgroup></query></rsiq>";

    //传统方法一步一步解析带有命名空间的XML文件
    @SuppressWarnings("unchecked")
    private static void test() throws DocumentException {
        List<Map<String, Object>> seatlist = new ArrayList<Map<String,Object>>();

        Document document = DocumentHelper.parseText(str);
        Element root = document.getRootElement();
        Element query = root.element("query");
        List<Element> workgroups = query.elements("workgroup");
        for(Element workgroup : workgroups) {
            Element seatsElement = workgroup.element("seats");
            List<Element> seats = seatsElement.elements("seat");
            for(Element seat : seats) {
                Map<String, Object> seatmap = new HashMap<String, Object>();
                String jid = seat.elementText("jid");
                String seatname = seat.elementText("name");
                String seatnumber = seat.elementText("seatnumber");
                String sessioncount = seat.elementText("sessioncount");
                seatmap.put("jid",jid);
                seatmap.put("seatname",seatname);
                seatmap.put("seatnumber",seatnumber);
                seatmap.put("sessioncount",sessioncount);
                seatlist.add(seatmap);
                System.out.println(seatmap);
            }
        }
        System.out.println(seatlist);
    }

    //Xpath方法解析没有命名空间的XML文件
    @SuppressWarnings("unchecked")
    private static void test1() throws DocumentException {
        List<Map<String, Object>> seatlist = new ArrayList<Map<String,Object>>();

        Document document = DocumentHelper.parseText(str1);
        List seats = document.selectNodes("//seat");
          for (int i = 0; i < seats.size(); i++) {
            Map<String, Object> seatmap = new HashMap<String, Object>();
            Element seat = (Element) seats.get(i);
            String jid = seat.elementText("jid");
            String seatname = seat.elementText("name");
            String seatnumber = seat.elementText("seatnumber");
            String sessioncount = seat.elementText("sessioncount");
            seatmap.put("jid",jid);
            seatmap.put("seatname",seatname);
            seatmap.put("seatnumber",seatnumber);
            seatmap.put("sessioncount",sessioncount);
            seatlist.add(seatmap);
          }
        System.out.println(seatlist);
    }

    //带有命名空间的XML文件，Xpath的解析方法
    @SuppressWarnings("unchecked")
    private static void test2() throws DocumentException {
        List<Map<String, Object>> seatlist = new ArrayList<Map<String,Object>>();

        Map map = new HashMap();
        map.put("getonlineseat","http://te.com/resource/cti/getonlineseat");
        Document document = DocumentHelper.parseText(str);
        XPath x = document.createXPath("//getonlineseat:seat");
        x.setNamespaceURIs(map);
        List nodelist = x.selectNodes(document);
          for (int i = 0; i < nodelist.size(); i++) {
            Map<String, Object> seatmap = new HashMap<String, Object>();
            Element seat = (Element) nodelist.get(i);
            String jid = seat.elementText("jid");
            String seatname = seat.elementText("name");
            String seatnumber = seat.elementText("seatnumber");
            String sessioncount = seat.elementText("sessioncount");
            seatmap.put("jid",jid);
            seatmap.put("seatname",seatname);
            seatmap.put("seatnumber",seatnumber);
            seatmap.put("sessioncount",sessioncount);
            seatlist.add(seatmap);
          }
        System.out.println(seatlist);
    }

    //主函数
    public static void main(String args[]) throws DocumentException {
        System.out.println("-----------test()方法------------");
        test();
        System.out.println("-----------test1()方法------------");
        test1();
        System.out.println("-----------test2()方法------------");
        test2();
    }
}