showcardlist.java

一个信息发布系统 基于jsp+servlet+tomcat 用户分管理员跟普通用户 普通用户有发布信息 查询信息 修改信息 回复信息 管理员拥有普通用户的功能 此外还具有删除信息 管理信息的回复的功能

package control;
import java.io.IOException;
import javax.servlet.http.*;
import javax.servlet.*;

import java.util.*;

public class ShowCardList extends HttpServlet
{
	public void init(ServletConfig config)throws ServletException
    {
   	 super.init(config);
    }
    
    public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException
    {
   	 doPost(req,res);
    }
    
    public void doPost(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException
    {
    	req.setCharacterEncoding("gbk");
    	CardCom com = new CardCom("jdbc:mysql://localhost/mybbs","root", "root123");
    	CategoryCom com2 = new CategoryCom("jdbc:mysql://localhost/mybbs","root", "root123");
    	Vector vc = new Vector();
        String Yonghu = req.getParameter("user");
        String Command = req.getParameter("command");
    	String CName = req.getParameter("id");  //从提交页面中获得传递过来的参数CName
    	int pagenum = Integer.parseInt((String)req.getParameter("pagenum")); //取得要显示的网页页码,第一次进入的时候为1
    	int pagecount = 0;
    	int total = com2.getCCount(CName);  //取得该板块中所有帖子数

    	if(total % 2==0)
    		pagecount  = total/2;
    	else
    		pagecount = ((int)total/2)+1;
    	
    	if(pagenum<=pagecount)
    	{
    		//vc = com.getAllCardBySize(CName, pagenum);
    	}
    	else
    		vc = null;   		
    	req.setAttribute("allcard", vc);
    	req.setAttribute("name", CName);
    	req.setAttribute("pagenum",String.valueOf(pagenum));  //当前页数
    	req.setAttribute("pagecount", String.valueOf(pagecount));//总共需要多少页面数
    	tiaoZhuan(req,res,"/ShowCardList.jsp");//跳转到该页面  显示所有的帖子Card
    }
    
    public void  tiaoZhuan(HttpServletRequest req,HttpServletResponse res,String page)throws ServletException,IOException
    {
   	 RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(page);
   	 dispatcher.forward(req, res);
    }
}