updatevoteservlet.java

用jsp编写的网上投票系统

package votebean;

import java.io.IOException;
import java.io.PrintWriter;

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

public class UpdateVoteServlet extends HttpServlet {

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

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

	/**
	 * 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.setHeader("Pragma", "No-cache");
		response.setHeader("Cache-control", "no-cache");
		response.setDateHeader("Expires", 0);
		response.setContentType("text/html;charset=GBK");
		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("/vote/admin/index.jsp");
		
	}

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

}