downloadpanel.java

该系统是一个基于p2p的即时聊天系统

/*
 * @(#) DownloadPanel.java
 * Copyright 2004 HWStudio. All rights reserved.
 */
package hws.item.smart.panel.function.share;
//导入核心Java类库
import java.io.IOException;
import java.io.StringReader;
import java.awt.Insets;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.net.MalformedURLException;
import java.util.List;
import java.util.Vector;
import java.util.ArrayList;
import javax.swing.JTree;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JButton;
import javax.swing.JSplitPane;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeSelectionModel;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.table.DefaultTableModel;
//导入自定义Java类库
import hws.item.smart.Smart;
import hws.item.smart.misc.ImageShop;
import hws.item.smart.misc.SBChanger;
import hws.item.smart.misc.XMLConfig;
import hws.item.smart.misc.StringShop;
import hws.item.smart.panel.function.chat.ViewPanel;
import hws.item.smart.action.share.download.DownloadAction;
import hws.item.smart.utility.chat.UserInfo;
import hws.item.smart.utility.share.RequestAgent;
import hws.item.smart.utility.share.TransferAgent;
import hws.item.smart.utility.share.ProgressRenderer;
//导入第三方Java类库
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;
/**
 * 下载文件面板
 *
 * @version 0.1 2005-08-30
 * @author Hwerz
 */
public class DownloadPanel extends JPanel {
    /*------------------------------------------------------------------------*
     *                                属性定义                                *
     *------------------------------------------------------------------------*/
    /**
     * 好友树根节点
     */
    private static final DefaultMutableTreeNode FRIEND_ROOT =
        new DefaultMutableTreeNode("我的好友(未登录)");
    /**
     * 文件树根节点
     */
    private static final DefaultMutableTreeNode FILE_ROOT =
        new DefaultMutableTreeNode("下载文件");
    /**
     * 该类自身的一个静态引用
     */
    private static DownloadPanel panel;
    /**
     * 好友视图面板
     */
    private FriendViewPanel friendViewPanel;
    /**
     * 文件视图面板
     */
    private FileViewPanel fileViewPanel;
    /**
     * 任务列表面板
     */
    private TaskListPanel taskListPanel;
    /*------------------------------------------------------------------------*
     *                                构造函数                                *
     *------------------------------------------------------------------------*/
    /**
     * 构造函数为私有，这样在整个运行过程中该类就只能有一个实例
     */
    private DownloadPanel() {
        super(new GridBagLayout());
        //工具栏面板
        GridBagConstraints constraints = new GridBagConstraints(
            //gridx, gridy
            0, 0,
            //gridwidth, gridheight
            1, 1,
            //weightx, weighty
            1.0, 0.0,
            //anchor
            GridBagConstraints.NORTH,
            //fill
            GridBagConstraints.HORIZONTAL,
            //insets
            new Insets(5, 0, 0, 0),
            //ipadx, ipady
            0, 0);
        add(new Toolbar(), constraints);
        //分割条面板
        taskListPanel = new TaskListPanel();
        fileViewPanel = new FileViewPanel();
        friendViewPanel = new FriendViewPanel();
        JSplitPane spliter1 = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, false,
            fileViewPanel, taskListPanel);
        spliter1.setBorder(null);
        spliter1.setOneTouchExpandable(true);
        spliter1.setDividerLocation(180);
        JSplitPane spliter2 = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, false,
            friendViewPanel, spliter1);
        spliter2.setOneTouchExpandable(true);
        spliter2.setDividerLocation(180);
        constraints.gridy = 1;
        constraints.weighty = 1.0;
        constraints.fill = GridBagConstraints.BOTH;
        constraints.insets = new Insets(5, 5, 5, 5);
        add(spliter2, constraints);
    }
    /*------------------------------------------------------------------------*
     *                                公共方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 对该类提供的一个全局访问点，用来实例化该对象
     *
     * @return 该类唯一的一个实例
     */
    public static DownloadPanel getInstance() {
        if (panel == null) {
            panel = new DownloadPanel();
        }
        return panel;
    }
    /**
     * 设置好友信息
     *
     * @param info 待设置的好友信息
     */
    public void setValue(UserInfo info) {
        friendViewPanel.setValue(info);
        String id = info.getBasicInfo().getID();
        RequestAgent.getInstance(id).start();
        TransferAgent.getInstance(id).start();
    }
    /**
     * 添加好友
     *
     * @param id 待添加好友的ID
     */
    public void addFriend(String id) {
        friendViewPanel.addFriend(id);
    }
    /**
     * 删除好友
     *
     * @param id 待删除好友的ID
     */
    public void deleteFriend(String id) {
        friendViewPanel.deleteFriend(id);
    }
    /**
     * 返回选中好友的ID
     *
     * @return 选中好友的ID
     */
    public String getSelectedFriendID() {
        return friendViewPanel.getSelectedFriendID();
    }
    /**
     * 返回选中的下载文件
     *
     * @return 选中的下载文件
     */
    public String getSelectedFile() {
        return fileViewPanel.getSelectedFile();
    }
    /**
     * 添加下载
     *
     * @param file 文件名
     * @param progress 下载进度
     */
    public void addDownload(String file, int progress) {
        taskListPanel.addRow(file, progress);
    }
    /**
     * 删除下载
     *
     * @param file 文件名
     */
    public void deleteDownload(String file) {
        taskListPanel.deleteRow(file);
    }
    /**
     * 设置下载
     *
     * @param file 文件名
     * @param progress 下载进度
     */
    public void setDownload(String file, int progress) {
        taskListPanel.setProgress(file, progress);
    }
    /*------------------------------------------------------------------------*
     *                                私有方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 生成请求URL
     *
     * @return 生成的请求URL
     */
    private String genURL() {
        StringBuffer url = new StringBuffer();
        url.append("http://");
        url.append(XMLConfig.getServicesIP());
        url.append(":");
        url.append(XMLConfig.getGettingPort());
        url.append("/");
        return url.toString();
    }
    /**
     * 生成XML-RPC请求消息
     *
     * @return 生成的XML-RPC请求消息
     */
    private XmlRpcRequest genRequest() {
        //请求方法
        StringBuffer method = new StringBuffer();
        method.append(XMLConfig.getGettingClass());
        method.append(".");
        method.append(XMLConfig.getGettingMethod());
        //请求参数
        Vector params = new Vector();
        XMLOutputter outputter = new XMLOutputter();
        params.addElement(outputter.outputString(genDocument()));
        return new XmlRpcRequest(method.toString(), params);
    }
    /**
     * 生成XML文档
     *
     * @return 生成的XML文档
     */
    private Document genDocument() {
        Element request = new Element("Request");
        Element level1 = new Element("ID");
        level1.setText(ViewPanel.getInstance().getUserID());
        request.addContent(level1);
        return new Document(request);
    }
    /**
     * 设置树型组件的附加选项
     *
     * @param tree 待设置的树型组件
     */
    private void setTree(JTree tree) {
        DefaultTreeSelectionModel model = new DefaultTreeSelectionModel();
        model.setSelectionMode(model.SINGLE_TREE_SELECTION);
        tree.setSelectionModel(model);
        tree.setSelectionRow(0);
        tree.expandRow(0);
    }
    /*------------------------------------------------------------------------*
     *                                 内部类                                 *
     *------------------------------------------------------------------------*/
    /**
     * 工具栏面板
     */
    class Toolbar extends JPanel {
        /**
         * Create a new instance of this class
         */
        public Toolbar() {
            super(new FlowLayout(FlowLayout.CENTER, 5, 0));
            //下载
            JButton button = new JButton(DownloadAction.getInstance());
            button.setIcon(ImageShop.DOWNLOAD_IMAGEICON);
            button.addMouseListener(new SBChanger(
                DownloadAction.getInstance().getHintInfo(), false));
            add(button);
        }
    }
    /**
     * 好友视图面板
     */
    class FriendViewPanel extends JPanel implements TreeSelectionListener {
        /**
         * 好友视图标签
         */
        private JLabel label;
        /**
         * 我的好友树的视图
         */
        private JTree friendTree;
        /**
         * 我的好友树的模型
         */
        private DefaultTreeModel friendModel;
        /**
         * Create a new instance of this class
         */
        public FriendViewPanel() {
            super(new GridBagLayout());
            //好友视图标签
            label = new JLabel("好友视图");
            GridBagConstraints constraints = new GridBagConstraints(
                //gridx, gridy
                0, 0,
                //gridwidth, gridheight
                1, 1,
                //weightx, weighty
                0.0, 0.0,
                //anchor
                GridBagConstraints.NORTHWEST,
                //fill
                GridBagConstraints.NONE,
                //insets
                new Insets(0, 5, 0, 0),
                //ipadx, ipady
                0, 0);
            add(label, constraints);
            //树型组件
            friendModel = new DefaultTreeModel(FRIEND_ROOT);
            friendTree = new JTree(friendModel);
            friendTree.addTreeSelectionListener(this);
            setTree(friendTree);
            setTreeCellRenderer();
            JScrollPane scroller = new JScrollPane(friendTree,
                JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
            constraints.gridy = 1;
            constraints.weightx = 1.0;
            constraints.weighty = 1.0;
            constraints.fill = GridBagConstraints.BOTH;
            constraints.insets = new Insets(0, 0, 0, 0);
            add(scroller, constraints);
        }
        /**
         * 设置好友信息
         *
         * @param info 待设置的好友信息
         */
        public void setValue(UserInfo info) {
            if (info != null) {
                unloadFriends();
                loadFriends(info);
                FRIEND_ROOT.setUserObject("我的好友(已登录)");
            }
        }
        /**
         * 添加好友
         *
         * @param id 待添加好友的ID
         */
        public void addFriend(String id) {
            if (id != null) {
                DefaultMutableTreeNode child = new DefaultMutableTreeNode(id);
                int count = FRIEND_ROOT.getChildCount();
                friendModel.insertNodeInto(child, FRIEND_ROOT, count);
                friendTree.expandRow(0);
                friendTree.setSelectionRow(count + 1);
            }
        }
        /**
         * 删除好友
         *
         * @param id 待删除好友的ID
         */
        public void deleteFriend(String id) {