messageservlet.java

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package servlet;

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

public class messageServlet 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");

        String type = request.getParameter("type");
        messageDAO cot = new messageDAO();

        if (type.equals("liuyan")) {
            //显示留言列表
            ArrayList list = (ArrayList) cot.Selectmessage();
            request.setAttribute("list", list);
            RequestDispatcher dis = request.getRequestDispatcher(
                    "main/newsmessage.jsp");
            dis.forward(request, response);
        }
        if (type.equals("add")) {
            messageBean cbean = new messageBean();
            String name = request.getParameter(
                    "name");
            String count = request.getParameter(
                    "count");
            cbean.setName(name);
            cbean.setMessage(count);

            //添加动作
            boolean host = false;

            host = cot.instermessage(cbean);
            if (host == true) {
                ArrayList list = (ArrayList) cot.Selectmessage();
                request.setAttribute("list", list);
                RequestDispatcher dis = request.getRequestDispatcher(
                        "main/newsindex.jsp");
                dis.forward(request, response);
            }
        }
        if (type.equals("del")) {
            //删除动作
            boolean flat = false;
            String messageid[] = request.getParameterValues("check");
            messageBean bean = new messageBean();

            for (int i = 0; i < messageid.length; i++) {

                bean.setID(messageid[i]);
                if(!cot.delmessage(bean))
                   {
                       flat=false;
                       break;
                   }

            }

            flat = cot.delmessage(bean);
            //判断删除是否正确
            if (flat == true) {
                ArrayList list = (ArrayList) cot.Selectmessage();
                request.setAttribute("list", list);
                RequestDispatcher dis = request.getRequestDispatcher(
                        "main/newsmessage.jsp");
                dis.forward(request, response);

            }

        }
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        doGet(request, response);
    }


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