用Java EE技术实现产品售后服务系统

package com.action;
/**
 * 
 * 留言本
 */
import java.io.IOException;
import java.util.List;
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.bean.GuestBookBean;
import com.bean.SystemBean;
import com.util.Constant;
import com.util.Filter;
public class GuestBookServlet extends HttpServlet {
  /**
   * Constructor of the object.
   */
  public GuestBookServlet() {
    super();
  }
  /**
   * Destruction of the servlet. <br>
   */
  public void destroy() {
    super.destroy(); // Just puts "destroy" string in log
    // Put your code here
  }
  /**
   * 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 {
      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 {
    request.setCharacterEncoding(Constant.CHARACTERENCODING);
    response.setContentType(Constant.CONTENTTYPE);
    //nikename, pic, email, qq, weburl, blogurl, expressions, content
    String sysdir = new SystemBean().getDir();
    HttpSession session = request.getSession();
    String method = request.getParameter("method").trim();
      GuestBookBean guestBookBean = new GuestBookBean();
      if(method.equals("add")){//发表留言
        String member=(String)session.getAttribute("member");
        String nikename = Filter.escapeHTMLTags(request.getParameter("nikename").trim());
        String face ="images/nobody.gif";
        String email = Filter.escapeHTMLTags(request.getParameter("email").trim());
        String qq = Filter.escapeHTMLTags(request.getParameter("qq").trim());
        String weburl = Filter.escapeHTMLTags(request.getParameter("weburl").trim());
        String blogurl = Filter.escapeHTMLTags(request.getParameter("blogurl").trim());
        String expressions = "images/face/"+Filter.escapeHTMLTags(request.getParameter("face").trim())+".gif";
        String content = Filter.escapeHTMLTags(request.getParameter("content").trim());
        String ip = request.getRemoteAddr();
        int guestbook=1;
        int flag = guestBookBean.addGuestBook(nikename, face, email, qq, weburl, blogurl, expressions, content, ip,guestbook);
        if(flag == 1){
            request.setAttribute("message", "谢谢您的留言，请等候管理员回复！");
            request.getRequestDispatcher("guestbook.jsp").forward(request, response);
        }
        else{
          request.setAttribute("message", "系统维护中，请稍后再试！");
          request.getRequestDispatcher("guestbook.jsp").forward(request, response);
        }
      }
      else if(method.equals("delguestbook")){//删除留言
        try{
          String username2 = (String)session.getAttribute("user");
          if(username2 == null){
            request.getRequestDispatcher("error.jsp").forward(request, response);
          }
          else{
            String check[] = request.getParameterValues("checkit");
            if(check == null){
              request.setAttribute("message", "请选择要删除的记录！");
              request.getRequestDispatcher(sysdir+"/guestbook/index.jsp").forward(request, response);
            }
            else{
              int id[]= new int[check.length];
              for(int i = 0;i<check.length;i++){
                int s = Integer.parseInt(check[i]);       
                id[i] = s;
              }
              int flag = guestBookBean.delGuestBook(id);
              if(flag == Constant.SUCCESS){
                request.getRequestDispatcher(sysdir+"/guestbook/index.jsp").forward(request, response);
              }
              else{
                request.setAttribute("message", "系统维护中，请稍后再试！");
                request.getRequestDispatcher(sysdir+"/guestbook/index.jsp").forward(request, response);
              }
            }
          }
        }catch(Exception e){
          request.getRequestDispatcher("error.jsp").forward(request, response);
        }
      }
      else if(method.equals("replay")){//回复留言
        try{
          String username2 = (String)session.getAttribute("user");
          if(username2 == null){
            request.getRequestDispatcher("error.jsp").forward(request, response);
          }
          else{
            String messageid = Filter.escapeHTMLTags(request.getParameter("id").trim());
            String replay = Filter.escapeHTMLTags(request.getParameter("replay").trim());
            int flag = guestBookBean.reGuestBook(Integer.parseInt(messageid), replay, username2);
            if(flag == Constant.SUCCESS){
              request.setAttribute("message", "回复成功！");
              request.getRequestDispatcher(sysdir+"/guestbook/index.jsp").forward(request, response);
            }
            else{
              request.setAttribute("message", "系统维护中，请稍后再试！");
              request.getRequestDispatcher(sysdir+"/guestbook/index.jsp").forward(request, response);
            }
          }
        }catch(Exception e){
          request.getRequestDispatcher("error.jsp").forward(request, response);
        }
      }
      else if(method.equals("upreplay")){
        try{
          String username2 = (String)session.getAttribute("user");
          if(username2 == null){
            request.getRequestDispatcher("error.jsp").forward(request, response);
          }
          else{
            String messageid = Filter.escapeHTMLTags(request.getParameter("id").trim());
            String replay = Filter.escapeHTMLTags(request.getParameter("replay").trim());
            int flag = guestBookBean.upReplay(Integer.parseInt(messageid), replay);
            if(flag == Constant.SUCCESS){
              request.setAttribute("message", "修改成功！");
              request.getRequestDispatcher(sysdir+"/guestbook/index.jsp").forward(request, response);
            }
            else{
              request.setAttribute("message", "系统维护中，请稍后再试！");
              request.getRequestDispatcher(sysdir+"/guestbook/index.jsp").forward(request, response);
            }
          }
        }catch(Exception e){
          request.getRequestDispatcher("error.jsp").forward(request, response);
        }
      }
      else{
        request.getRequestDispatcher("error.jsp").forward(request, response);
      }
  }
  /**
   * Initialization of the servlet. <br>
   *
   * @throws ServletException if an error occure
   */
  public void init() throws ServletException {
    // Put your code here
  }
}