inbox.java

网络邮件系统

/*
 * This product includes software developed by the
 * Apache Software Foundation (http://www.apache.org/).
 */
package ch05.controller;

import java.io.*;
import java.util.Hashtable;

import javax.servlet.*;
import javax.servlet.http.*;

import ch05.*;
import ch05.module.*;

/**
 * 针对收件箱页面的Servlet
 * @author ShenYK
 * @version 1.0
 */
public class Inbox extends HttpServlet
{
    public void doGet ( HttpServletRequest request, 
                        HttpServletResponse response )
        throws ServletException, IOException 
    {
        //设置提交表单的中文编码
        request.setCharacterEncoding("GBK");
        
        HttpSession mySession = request.getSession(true);
        
        //清空错误消息
        mySession.setAttribute("errMsg","");
        
        //是否非法进入本页面
        if ( mySession.getAttribute("username") == null )
        {
            response.sendRedirect("/ch05/login.jsp");
            return;
        }
        //是否进入默认页面
        if ( !request.getParameterNames().hasMoreElements() )
        {
            //设置session中的页面值域
            mySession.setAttribute(CommonConst.VIEWID_INBOXLIST, new Hashtable() );
            //取得最新邮件
            MInbox mInbox = new MInbox();
            boolean bGetResult = mInbox.getNewestMail( mySession );
            mySession.setAttribute("curPage","inbox");
            response.sendRedirect("/ch05/inbox.jsp");
            return;
            
        }
        
        //得到用户输入信息
        String sMailIndex = request.getParameter("mailIndex");
        String sMailOption = request.getParameter("mailOption");
        
        //如果用户是提交表单
        if ( sMailIndex != null && sMailIndex.length() > 0 )
        {
            //设置session中的详细页面值域
            mySession.setAttribute(CommonConst.VIEWID_INBOXDETAIL, new Hashtable() );
            //获得对应的邮件信息
            MInbox mInbox = new MInbox();
            boolean bGetResult = mInbox.getDetailMail( mySession, sMailIndex );
            
            if ( bGetResult )
            {
                response.sendRedirect("/ch05/inboxDetail.jsp");
            }
            else
            {
                response.sendRedirect("/ch05/inbox.jsp");
            }
        }
        //如果用户是从详细页面迁移过来的
        else if ( sMailOption != null && sMailOption.length() > 0 )
        {
            String sSender = request.getParameter("sender");
            String sSendTime = request.getParameter("sendTime");
            String sSubject = request.getParameter("subject");
            String sContent = request.getParameter("content");
            //删除邮件
            if ( sMailOption.equals("delete") )
            {
                MInbox mInbox = new MInbox();
                boolean bDeleteResult = mInbox.deleteMail( mySession, sSender, sSendTime );
                mInbox.getNewestMail( mySession );
                response.sendRedirect("/ch05/inbox.jsp");
                return;
            }
            //回复邮件
            else if ( sMailOption.equals("reply") )
            {
                //设置session中的写邮件页面值域
                mySession.setAttribute(CommonConst.VIEWID_SENDBOXDETAIL, new Hashtable() );
                MInbox mInbox = new MInbox();
                boolean bReplyResult = mInbox.replyMail( mySession, sSender, sSubject, sContent );
                mySession.setAttribute("curPage","composite");
                response.sendRedirect("/ch05/composite.jsp");
                return;
            }
        }
        //如果用户非法进入这个页面
        else
        {
            response.sendRedirect("/ch05/login.jsp");
        }
    }
    
    public void doPost ( HttpServletRequest request, 
                           HttpServletResponse response )
        throws ServletException, IOException 
    {
        doGet( request, response );
    }
}