logonpanel.java

该系统是一个基于p2p的即时聊天系统

/*
 * @(#) LogonPanel.java
 * Copyright 2004 HWStudio. All rights reserved.
 */
package hws.item.smart.panel.function.chat;
//导入核心Java类库
import java.io.IOException;
import java.io.StringReader;
import java.awt.Insets;
import java.awt.FlowLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.net.MalformedURLException;
import java.util.List;
import java.util.Vector;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
//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.BorderShop;
import hws.item.smart.misc.PopToolkit;
import hws.item.smart.misc.StringShop;
import hws.item.smart.panel.function.share.UploadPanel;
import hws.item.smart.panel.function.share.DownloadPanel;
import hws.item.smart.action.chat.logon.LogonSystemAction;
import hws.item.smart.action.chat.logon.DeleteCacheAction;
import hws.item.smart.utility.chat.UserInfo;
//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;
/**
 * 登录系统面板
 *
 * @version 0.1 2005-08-25
 * @author Hwerz
 */
public class LogonPanel extends JPanel {
    /*------------------------------------------------------------------------*
     *                                属性定义                                *
     *------------------------------------------------------------------------*/
    /**
     * 该类自身的一个静态引用
     */
    private static LogonPanel panel;
    /**
     * 登录信息面板
     */
    private LogonInfoPanel logonInfoPanel;
    /*------------------------------------------------------------------------*
     *                                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 LogonPanel() {
        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);
        //登录信息面板
        logonInfoPanel = new LogonInfoPanel();
        logonInfoPanel.setBorder(BorderShop.LOGON_INFO_BORDER);
        constraints.gridy = 1;
        constraints.weighty = 1.0;
        constraints.insets = new Insets(0, 10, 0, 10);
        add(logonInfoPanel, 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 LogonPanel getInstance() {
        if (panel == null) {
            panel = new LogonPanel();
        }
        return panel;
    }
    /**
     * 登录
     */
    public void logon() {
        String id = logonInfoPanel.getID();
        if (id.length() == 0) {
            JOptionPane.showMessageDialog(Smart.getInstance(), "账号不可为空！",
                StringShop.HINT_TITLE, JOptionPane.INFORMATION_MESSAGE);
        } else {
            try {
                XmlRpc.setDriver("org.apache.xerces.parsers.SAXParser");
                XmlRpcClient client = new XmlRpcClient(genURL());
                String response = client.execute(genRequest()).toString();
                SAXBuilder builder = new SAXBuilder();
                StringReader reader = new StringReader(response);
                Document document = builder.build(reader);
                Element root = document.getRootElement();
                String result = root.getChild("Result").getText();
                if (result.equals(StringShop.USER_NOT_EXIST) == true) {
                    StringBuffer msg = new StringBuffer();
                    msg.append("账号为“");
                    msg.append(id);
                    msg.append("”的用户不存在！");
                    JOptionPane.showMessageDialog(Smart.getInstance(),
                        msg.toString(), StringShop.HINT_TITLE,
                        JOptionPane.INFORMATION_MESSAGE);
                } else if (result.equals(StringShop.USER_IS_ONLINE) == true) {
                    StringBuffer msg = new StringBuffer();
                    msg.append("账号为“");
                    msg.append(id);
                    msg.append("”的用户已上线！");
                    JOptionPane.showMessageDialog(Smart.getInstance(),
                        msg.toString(), StringShop.HINT_TITLE,
                        JOptionPane.INFORMATION_MESSAGE);
                } else if (result.equals(StringShop.PASSWORD_ERROR) == true) {
                    JOptionPane.showMessageDialog(Smart.getInstance(),
                        "密码错误，登录失败！", StringShop.HINT_TITLE,
                        JOptionPane.INFORMATION_MESSAGE);
                } else if (result.equals(StringShop.LOGON_SUCCESS) == true) {
                    JOptionPane.showMessageDialog(Smart.getInstance(),
                        "登录成功！", StringShop.HINT_TITLE,
                        JOptionPane.INFORMATION_MESSAGE);
                    addCache();
                    Smart.getInstance().logout();
                    UserInfo info = UserInfo.getRemoteUserInfo(id);
                    ViewPanel.getInstance().setValue(info);
                    FriendPanel.getInstance().setValue(info);
                    DownloadPanel.getInstance().setValue(info);
                    UploadPanel.getInstance().refresh();
                } else {
                    JOptionPane.showMessageDialog(Smart.getInstance(),
                        "登录失败，请稍候再试！", StringShop.HINT_TITLE,
                        JOptionPane.INFORMATION_MESSAGE);
                }
            } catch (ClassNotFoundException e) {
                JOptionPane.showMessageDialog(Smart.getInstance(),
                    "系统找不到类库“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(),
                    "登录服务已关闭，请稍候再试！", StringShop.HINT_TITLE,
                    JOptionPane.INFORMATION_MESSAGE);
            } catch (JDOMException e) {
                JOptionPane.showMessageDialog(Smart.getInstance(),
                    "登录失败，请稍候再试！", StringShop.HINT_TITLE,
                    JOptionPane.INFORMATION_MESSAGE);
            }
        }
    }
    /**
     * 删除缓存
     */
    public void deleteCache() {
        XMLConfig.deleteCache(logonInfoPanel.getID(), true);
        logonInfoPanel.reloadCaches();
    }
    /*------------------------------------------------------------------------*
     *                                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.getLogonPort());
        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.getLogonClass());
        method.append(".");
        method.append(XMLConfig.getLogonMethod());
        //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(logonInfoPanel.getID());
        request.addContent(level1);
        level1 = new Element("Password");
        level1.setText(logonInfoPanel.getPassword());
        request.addContent(level1);
        level1 = new Element("IP");
        level1.setText(PopToolkit.getLocalIP());
        request.addContent(level1);
        return new Document(request);
    }
    /**
     * 添加缓存
     */
    private void addCache() {
        XMLConfig.addCache(logonInfoPanel.getID(), true);
        logonInfoPanel.reloadCaches();
    }
    /*------------------------------------------------------------------------*
     *                                 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));
            //确定
            JButton button = new JButton(LogonSystemAction.getInstance());
            button.setIcon(ImageShop.OK_IMAGEICON);
            button.addMouseListener(new SBChanger(
                LogonSystemAction.getInstance().getHintInfo(), false));
            add(button);
            //删除
            button = new JButton(DeleteCacheAction.getInstance());
            button.setIcon(ImageShop.DELETE_IMAGEICON);
            button.addMouseListener(new SBChanger(
                DeleteCacheAction.getInstance().getHintInfo(), false));
            add(button);
        }
    }
    /**
     * 登录信息面板
     */
    class LogonInfoPanel extends JPanel
        implements ActionListener, ItemListener {
        /**
         * ID下拉框
         */
        private JComboBox idComboBox;
        /**
         * 密码文本框
         */
        private JPasswordField passwordField;
        /**
         * Create a new instance of this class
         */
        public LogonInfoPanel() {
            super(new GridBagLayout());
            //ID标签
            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(5, 10, 0, 0),
                //ipadx, ipady
                0, 0);
            add(new JLabel("ID："), constraints);
            //ID下拉框
            idComboBox = new JComboBox(XMLConfig.getAllCaches().toArray());
            idComboBox.setEditable(true);
            idComboBox.addItemListener(this);
            constraints.gridx = 1;
            constraints.gridwidth = GridBagConstraints.REMAINDER;
            constraints.weightx = 1.0;
            constraints.fill = GridBagConstraints.HORIZONTAL;
            constraints.insets = new Insets(5, 0, 0, 10);
            add(idComboBox, constraints);
            //密码标签
            constraints.gridx = 0;
            constraints.gridy = 1;
            constraints.gridwidth = 1;
            constraints.weightx = 0.0;
            constraints.fill = GridBagConstraints.NONE;
            constraints.insets = new Insets(5, 10, 0, 0);
            add(new JLabel("密码："), constraints);
            //密码文本框
            passwordField = new JPasswordField();
            passwordField.addActionListener(this);
            constraints.gridx = 1;
            constraints.gridwidth = GridBagConstraints.REMAINDER;
            constraints.weightx = 1.0;
            constraints.fill = GridBagConstraints.HORIZONTAL;
            constraints.insets = new Insets(5, 0, 5, 10);
            add(passwordField, constraints);
        }
        /**
         * 返回ID
         *
         * @return ID
         */
        public String getID() {
            return idComboBox.getSelectedItem().toString();
        }
        /**
         * 返回密码
         *
         * @return 密码
         */
        public String getPassword() {
            char[] chars = passwordField.getPassword();
            return String.valueOf(chars, 0, chars.length);
        }
        /**
         * 重载缓存
         */
        public void reloadCaches() {
            unloadCaches();
            loadCaches();
            passwordField.setText("");
        }
        /**
         * 装载缓存
         */
        private void loadCaches() {
            List caches = XMLConfig.getAllCaches();
            for (int i = 0; i < caches.size(); i++) {
                idComboBox.addItem(caches.get(i));
            }
            if (caches.size() > 0) {
                DeleteCacheAction.getInstance().setEnabled(true);
            } else {
                DeleteCacheAction.getInstance().setEnabled(false);
            }
        }
        /**
         * 卸载缓存
         */
        private void unloadCaches() {
            idComboBox.removeAllItems();
        }
        /**
         * 实现接口ActionListener的方法
         *
         * @param event the event that characterizes the action
         */
        public void actionPerformed(ActionEvent event) {
            LogonSystemAction.getInstance().actionPerformed(null);
        }
        /**
         * 实现接口ItemListener的方法
         *
         * @param event the event that characterizes the change
         */
        public void itemStateChanged(ItemEvent event) {
            passwordField.setText("");
        }
    }
}