updatehandler.java

该系统是一个基于p2p的即时聊天系统

/*
 * @(#) UpdateHandler.java
 * Copyright 2004 HWStudio. All rights reserved.
 */
package hws.item.smart.utility.admin;
//导入核心Java类库
import java.io.IOException;
import java.io.StringReader;
//导入自定义Java类库
import hws.item.smart.misc.StringShop;
import hws.item.smart.panel.function.admin.UserPanel;
import hws.item.smart.panel.function.admin.FriendPanel;
import hws.item.smart.panel.function.admin.UpdatePanel;
//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;
/**
 * 更新处理器
 *
 * @version 0.1 2005-08-23
 * @author Hwerz
 */
public class UpdateHandler extends Object {
    /*------------------------------------------------------------------------*
     *                                公共方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 信息更新
     *
     * @param requestMsg 信息更新的请求信息
     * @return 信息更新的响应信息
     */
    public String update(String requestMsg) {
        String result = StringShop.UPDATE_FAILURE;
        try {
            SAXBuilder builder = new SAXBuilder();
            StringReader reader = new StringReader(requestMsg);
            Document document = builder.build(reader);
            Element request = document.getRootElement();
            Element newUser = request.getChild("User");
            Element basic = (Element) newUser.getChild("Basic").clone();
            String id = basic.getChild("ID").getText();
            String nickname = basic.getChild("Nickname").getText();
            String password = basic.getChild("Password").getText();
            Element oldUser = XMLAccessor.getUserElement(id, false);
            Element shares = (Element) oldUser.getChild("Shares").clone();
            oldUser.removeContent();
            oldUser.addContent(basic);
            oldUser.addContent((Element) newUser.getChild("Optional").clone());
            oldUser.addContent((Element) newUser.getChild("Friends").clone());
            oldUser.addContent(shares);
            XMLAccessor.saveDocument();
            UserPanel.getInstance().refresh();
            FriendPanel.getInstance().refresh();
            UpdatePanel.getInstance().update(id, nickname, password);
            result = StringShop.UPDATE_SUCCESS;
        } catch (JDOMException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        XMLOutputter outputter = new XMLOutputter();
        Element response = new Element("Response");
        Element element = new Element("Result");
        element.setText(result);
        response.addContent(element);
        return outputter.outputString(new Document(response));
    }
}