updatevoteservlet.java

来自「用java实现一个功能完善的投票系统」· Java 代码 · 共 45 行

package com.wxpn.tutorial.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class for Servlet: UpdateVoteServlet
 */
public class UpdateVoteServlet extends javax.servlet.http.HttpServlet implements
		javax.servlet.Servlet {
	/*
	 * (non-Java-doc)
	 * 
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public UpdateVoteServlet() {
		super();
	}

	/*
	 * (non-Java-doc)
	 * 
	 * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request,
	 *      HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		response.setHeader("Pragma","No-cache");
		response.setHeader("Cache-Control","no-cache");
		response.setDateHeader("Expires", 0);
		response.setContentType("text/html;charset=UTF-8");
		String id = request.getParameter("id");
		String[] vote = request.getParameterValues("vote");
		VoteMgr mgr = new VoteMgr();
		mgr.updateQuestion(Integer.parseInt(id));

		if (vote != null) {
			mgr.updateItem(vote);
		}
		response.sendRedirect("index.jsp");

	}
}