showtopics.java

一个很好的BBS论坛项目

package com.ibm.control;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.util.ArrayList;
import java.util.Iterator;

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

import com.ibm.common.DBConnection;
import com.ibm.dto.NextBoardDTO;
import com.ibm.service.TopicsService;
import com.ibm.service.UsersService;
import com.ibm.vo.TopicVO;

public class ShowTopics extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ShowTopics() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request,response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		
		String temp= request.getParameter("boardid");
		int boardid = Integer.parseInt(temp);

	//	NextBoardDTO nbdto = new NextBoardDTO();
		
		Connection conn = DBConnection.getInstance().getConnection();
		TopicsService tser = TopicsService.getInstance();
		
		ArrayList list = new ArrayList();
		ArrayList list1 = new ArrayList();
		list = tser.queryByid(conn, boardid);
		HttpSession session = request.getSession(true);
		System.out.println(session.getAttribute(temp));
		session.setAttribute("temp", session.getAttribute(temp));
		
		Iterator it = list.iterator();
		while(it.hasNext())
		{
			TopicVO tvo = (TopicVO)it.next();
			int uid = tvo.getUid();
			System.out.println("dffffffffffff"+uid);
			Connection conn1 = DBConnection.getInstance().getConnection();
			String username = UsersService.getInstance().queryById(conn1, uid).getUsername();
			list1.add(username);
		}
		session.setAttribute("usernamelist", list1);
		session.setAttribute("topiclist", list);
		session.setAttribute("boardid", boardid);
		request.getRequestDispatcher("list.jsp").forward(request, response);
		//response.sendRedirect("list.jsp");
		
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}