getcommentsservlet.java

jsp + servlete + jdbc开的管理系统

package hbu.david.cmc.servlet;

import hbu.david.cmc.bean.Comment;
import hbu.david.cmc.http.ServletEncoding;
import hbu.david.cmc.util.ParseRequest;
import hbu.david.cmc.work.*;

import java.io.IOException;
import java.util.List;

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

/**
 * Servlet implementation class for Servlet: GetCommentsServlet
 *
 */
 public class GetCommentsServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
   static final long serialVersionUID = 1L;
   
    /* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public GetCommentsServlet() {
		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
		doPost(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
		ServletEncoding.setEncoding(request, response);
		int photoId=ParseRequest.parseInt(request, "photoId", 0);
		int currentPage=ParseRequest.parseInt(request, "currentPage", 0);
		//每页显示10行
		int num=10;
		//总记录
		int allNum=CommentBean.getCommentNumByPhotoId(photoId);
		//总页数
		int pageNum=(allNum-1)/num+1;
		List<Comment> commentList=CommentBean.getComments(currentPage*num, num, photoId, 0);
		int itemNum=commentList.size();
		request.setAttribute("pageNum", pageNum);
		request.setAttribute("num", num);
		request.setAttribute("commentList", commentList);
		request.setAttribute("allNum", allNum);
		request.setAttribute("currentPage", currentPage);
		request.setAttribute("photoId", photoId);
		request.setAttribute("itemNum", itemNum);
		request.getRequestDispatcher("commentPhotoList.jsp").forward(request, response);
	}   	  	    
}