/* * @(#) FriendsInfo.java * Copyright 2004 HWStudio. All rights reserved. */package hws.item.smart.utility.chat;//導入核心Java類庫import java.io.IOException;import java.io.StringReader;import java.net.MalformedURLException;import java.util.List;import java.util.Vector;import java.util.ArrayList;import javax.swing.JOptionPane;//導入自定義Java類庫import hws.item.smart.Smart;import hws.item.smart.misc.XMLConfig;import hws.item.smart.misc.StringShop;//導入第三方Java類庫import org.jdom.Element;import org.jdom.Document;import org.jdom.JDOMException;import org.jdom.input.SAXBuilder;import org.jdom.output.XMLOutputter;import org.apache.xmlrpc.XmlRpc;import org.apache.xmlrpc.XmlRpcClient;import org.apache.xmlrpc.XmlRpcRequest;import org.apache.xmlrpc.XmlRpcException;/** * 好友信息 * * @version 0.1 2005-08-22 * @author Hwerz */public class FriendsInfo extends Object {    /*------------------------------------------------------------------------*     *                                屬性定義                                *     *------------------------------------------------------------------------*/    /**     * 好友列表，實際存放的是好友的ID     */    private List friends;    /*------------------------------------------------------------------------*     *                                構造函數                                *     *------------------------------------------------------------------------*/    /**     * Create a new instance of this class     */    public FriendsInfo() {        super();        friends = new ArrayList();    }    /*------------------------------------------------------------------------*     *                                公共方法                                *     *------------------------------------------------------------------------*/    /**     * 將指定的Friends元素轉換成FriendsInfo對象     *     * @param friends 指定的Friends元素     * @return 轉換后的FriendsInfo對象     */    public static FriendsInfo friendsElement2FriendsInfo(Element friends) {        FriendsInfo friendsInfo = new FriendsInfo();        List children = friends.getChildren();        for (int i = 0; i < children.size(); i++) {            Element friend = (Element) children.get(i);            friendsInfo.addFriend(friend.getAttributeValue("id"));        }        return friendsInfo;    }    /**     * 返回指定好友的IP地址     *     * @param id 指定好友的ID     * @return 指定好友的IP地址     */    public static String getFriendIP(String id) {        String ip = null;        try {            XmlRpc.setDriver("org.apache.xerces.parsers.SAXParser");            XmlRpcClient client = new XmlRpcClient(genURL());            String response = client.execute(genRequest(id)).toString();            SAXBuilder builder = new SAXBuilder();            StringReader reader = new StringReader(response);            Document document = builder.build(reader);            Element root = document.getRootElement();            ip = root.getChild("IP").getText();        } catch (ClassNotFoundException e) {            JOptionPane.showMessageDialog(Smart.getInstance(),                "系統找不到類庫“org.apache.xerces.parsers.SAXParser”！",                StringShop.HINT_TITLE, JOptionPane.INFORMATION_MESSAGE);        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (XmlRpcException e) {            e.printStackTrace();        } catch (IOException e) {            JOptionPane.showMessageDialog(Smart.getInstance(),                "用戶服務已關閉，請稍候再試！", StringShop.HINT_TITLE,                JOptionPane.INFORMATION_MESSAGE);        } catch (JDOMException e) {            e.printStackTrace();        }        return ip;    }    /**     * 返回所有好友     *     * @return 所有好友     */    public List getAllFriends() {        return friends;    }    /**     * 添加好友     *     * @param id 待添加好友的ID     */    public void addFriend(String id) {        friends.add(id);    }    /*------------------------------------------------------------------------*     *                                私有方法                                *     *------------------------------------------------------------------------*/    /**     * 生成請求URL     *     * @return 生成的請求URL     */    private static String genURL() {        StringBuffer url = new StringBuffer();        url.append("http://");        url.append(XMLConfig.getServicesIP());        url.append(":");        url.append(XMLConfig.getAddressPort());        url.append("/");        return url.toString();    }    /**     * 生成XML-RPC請求消息     *     * @param id 指定好友的ID     * @return 生成的XML-RPC請求消息     */    private static XmlRpcRequest genRequest(String id) {        //請求方法        StringBuffer method = new StringBuffer();        method.append(XMLConfig.getAddressClass());        method.append(".");        method.append(XMLConfig.getAddressMethod());        //請求參數        Vector params = new Vector();        XMLOutputter outputter = new XMLOutputter();        params.addElement(outputter.outputString(genDocument(id)));        return new XmlRpcRequest(method.toString(), params);    }    /**     * 生成XML文檔     *     * @param id 指定用戶的ID     * @return 生成的XML文檔     */    private static Document genDocument(String id) {        Element request = new Element("Request");        Element level1 = new Element("ID");        level1.setText(id);        request.addContent(level1);        return new Document(request);    }}