getmessagesservlet.java

该系统是一个留言本

package com.v512.guestbook;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.v512.guestbook.dao.GuestbookDAO;
import com.v512.guestbook.dao.jdbc.GuestbookDAOJdbc;
import com.v512.util.Pagination;

public class GetMessagesServlet extends HttpServlet {
	private static final long serialVersionUID = 5964428201228635704L;
	private int pageSize;

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		int pageNumber;
		try {
			pageNumber = Integer.parseInt(request.getParameter("p"));
		} catch (Exception e) {
			pageNumber = 1;
		}
		
		GuestbookDAO dao = new GuestbookDAOJdbc();
		Pagination pager=dao.getGuestbookByPage(pageSize, pageNumber);
		
		request.setAttribute("guestbook.pager", pager);		
		request.getRequestDispatcher("/getMessages.jsp").forward(request, response);
	}
	
	public void init(ServletConfig config)throws ServletException{
		super.init(config);
		try{
			this.pageSize=Integer.parseInt(config.getServletContext().getInitParameter("pageSize"));
		}catch(Exception e){
			this.pageSize=10;
		}
	}
}