newsservlet.java

新闻发布系统的雏形

package com.kjlm.servlet;

import java.io.IOException;
import java.util.Collection;

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

import com.kjlm.beans.MasterMgr;
import com.kjlm.beans.NewsMgr;

/**
 * Servlet implementation class for Servlet: NewsServlet
 *
 */
 public class NewsServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
    /* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public NewsServlet() {
		super();
	}   	
	
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		String page = request.getParameter("page").trim();
		int categoryId =Integer.parseInt(request.getParameter("categoryId"));

		NewsMgr newsMgr = new NewsMgr();
		int count = newsMgr.getCount(categoryId);
		int pageSize =2;
		int pageTotalNum = count /pageSize;
		if(count % pageSize >0){
			pageTotalNum++;
		} 
		if(page==null||page==""){
			page="1";
		}
		request.setAttribute("pageTotalNum", new Integer(pageTotalNum));
		Collection c = newsMgr.getAllNewsByCategoryId(Integer.parseInt(page), pageSize, categoryId,pageTotalNum);
		request.setAttribute("c", c);
		request.getRequestDispatcher("/news.jsp").forward(request, response);
		
	}  	
	
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
	}   	  	    
}