showcategory.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 model.*;
import java.util.*;

public class ShowCategory extends HttpServlet
{
	private static Vector vc ;
	//public ShowCategory(){}   //去掉该注释的时候  ShowChex出错  为什么
	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
    {
    	CategoryCom com2 = new CategoryCom("jdbc:mysql://localhost/mybbs?useUnicode=true&characterEncoding=gbk","root", "root123");
    	vc = com2.getAllCatefory();    //用来存储Category
    	String command = (String)req.getParameter("command");
    	req.setAttribute("demo", vc);
    	req.setAttribute("command", command);
    	
    	tiaoZhuan(req,res,"/DengLuOK.jsp");
    }
    
    public static Vector getCategoryList()
    {
    	return vc;
    }
    
    public void  tiaoZhuan(HttpServletRequest req,HttpServletResponse res,String page)throws ServletException,IOException
    {
   	 RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(page);
   	 dispatcher.forward(req, res);
    }
}