editservlet.java

jsp+servlet+javaBean实现MVC

package com.wang.servlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.wang.bean.*;
/*
 提供编辑功能的servlet
 */
public class EditServlet
    extends HttpServlet
{
    private static final String CONTENT_TYPE = "text/html; charset=GBK";

    //Initialize global variables
    public void init()
        throws ServletException
    {
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
    {

        if (request.getParameter("id") != null)
        {
            long id = Long.parseLong(request.getParameter("id"));
            DataBean db = new DataBean();
            CDBean cb=null;
            if (request.getParameter("action") != null)
            {
                if (request.getParameter("action").equals("updata"))
                {
                    cb = new CDBean();
                    cb.setCdAlbum(request.getParameter("cdAlbum"));
                    cb.setCdCompany(request.getParameter("cdCompany"));
                    cb.setCdName(request.getParameter("cdName"));
                    cb.setCdType(request.getParameter("cdType"));
                    cb.setCdId(id);
                    boolean result = db.setCDBean(cb);
                    request.setAttribute("result", result);
                }
            }
            else
            {
                 cb = db.getCDBean(id);
            }
            request.setAttribute("CDBean", cb);
            RequestDispatcher rd = request.getRequestDispatcher("edit.jsp");
            rd.forward(request, response);
        }
    }

    //Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
    {
        doGet(request, response);
    }

    //Clean up resources
    public void destroy()
    {
    }
}