使用JSP+JavaBean+Servlet实现投票系统.zip

package com.bcu.servlet; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.bcu.bean.Pro; public class ProServlet extends HttpServlet { private static final long serialVersionUID = 1L; public static Map<String,Pro> pros=new HashMap<>(); public static String pro_id ; public static String pro_name; public static String pro_type; public static String pro_per ; public static String pro_dan ; public static String pro_num ; public ProServlet() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); String cmd = request.getParameter("cmd"); if("queryPros".equals(cmd)) { request.setAttribute("pros", pros); request.getRequestDispatcher("pro-list.jsp").forward(request, response); } else if("insertPro".equals(cmd)) { String pro_id = request.getParameter("pro_id"); String pro_name = request.getParameter("pro_name"); String pro_type = request.getParameter("pro_type"); String pro_per = request.getParameter("pro_per"); String pro_dan = request.getParameter("pro_dan"); String pro_num = request.getParameter("pro_num"); Pro pro = new Pro(pro_id,pro_name,pro_type,pro_per,pro_dan,pro_num); pros.put(pro_id, pro); response.sendRedirect("ProServlet?cmd=queryPros"); } else if("getProUpdate".equals(cmd)) { String pro_id = request.getParameter("pro_id"); Pro pro = pros.get(pro_id); request.setAttribute("pro", pro); request.getRequestDispatcher("pro-update.jsp").forward(request, response); } else if("updatePro".equals(cmd)) { String pro_id = request.getParameter("pro_id"); String pro_name = request.getParameter("pro_name"); String pro_type = request.getParameter("pro_type"); String pro_per = request.getParameter("pro_per"); String pro_dan = request.getParameter("pro_dan"); String pro_num = request.getParameter("pro_num"); Pro pro = pros.get(pro_id); pro.setPro_name(pro_name); pro.setPro_type(pro_type); pro.setPro_per(pro_per); pro.setPro_dan(pro_dan); pro.setPro_num(pro_num); System.out.println(pro_num); response.sendRedirect("ProServlet?cmd=queryPros"); } else if("deletePro".equals(cmd)) { String pro_id = request.getParameter("pro_id"); pros.remove(pro_id); response.sendRedirect("ProServlet?cmd=queryPros"); } else if("gradePro".equals(cmd)) { String pro_id = request.getParameter("pro_id"); String pro_num = request.getParameter("pro_num"); Pro pro = pros.get(pro_id); pro.setPro_num(pro_num); request.getRequestDispatcher("write.jsp").forward(request, response); } else if("update1".equals(cmd)) { String pro_id = request.getParameter("pro_id"); String pro_name = request.getParameter("pro_name"); String pro_type = request.getParameter("pro_type"); String pro_per = request.getParameter("pro_per"); String pro_dan = request.getParameter("pro_dan"); String pro_num = request.getParameter("pro_num"); System.out.println(pro_id); System.out.println("============================"); Pro pro = pros.get(pro_id); request.setAttribute("pro", pro); System.out.println(pro_id); pro.setPro_num(pro_num); request.getRequestDispatcher("grade.jsp").forward(request, response); //response.sendRedirect("ProServlet?cmd=queryPros"); } /*else if("update2".equals(cmd)) { ProServlet proservlet = new ProServlet(); // Map<String,Pro> pros=new HashMap<>(); // pros=proservlet.pros; System.out.println("len ="+proservlet.pros.size()); request.setAttribute("pro", proservlet.pros); String pro_id = request.getParameter("pro_id"); String pro_num = request.getParameter("pro_num"); Pro pro = pros.get(pro_id); pro.setPro_num(pro_num); System.out.println(pro_num); request.getRequestDispatcher("write.jsp").forward(request, response); }*/ } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }