voteservlet.java

来自「是一个简单的在线投票系统」· Java 代码 · 共 43 行

package votetool;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

public class VoteServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=GBK";

    //Initialize global variables
    public void init() throws ServletException {
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        response.setContentType(CONTENT_TYPE);
        request.setCharacterEncoding("GBK");
        PrintWriter out = response.getWriter();
        String answer=request.getParameter("choose");
        BaseDao db=new BaseDao();
        int i=db.update(answer);
        if(i>0){
            this.getServletContext().getRequestDispatcher("/success.jsp").forward(request,response);
        }
        else{
            this.getServletContext().getRequestDispatcher("/error.jsp").forward(request,response);
        }

    }

    //Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        doGet(request, response);
    }

    //Clean up resources
    public void destroy() {
    }
}