secondlevelshow.java

基于JAVA新闻发部系统

package com.myservlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

import javax.servlet.RequestDispatcher;
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.mybean.SecondLevel;

public class secondlevelshow extends HttpServlet {

	/**
	 * 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 {

		this.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");
		request.setCharacterEncoding("gbk");
		response.setCharacterEncoding("gbk");
		PrintWriter out = response.getWriter();
		int firstid = Integer.parseInt(request.getParameter("id"));
		HttpSession session=request.getSession();
		session.setAttribute("id",firstid);
		ArrayList lst =null;
		SecondLevel second = new SecondLevel();
		lst = second.selectSecondLevel(firstid);
		System.out.println(lst.size());
		if (lst == null) {
			out.print("此类没有新闻!");
		} else {
			request.setAttribute("lst", lst);
			RequestDispatcher dis = request.getRequestDispatcher("/secondLevel.jsp");
			dis.forward(request, response);
	}
		out.close();

	}
}