newstypeservlet.java

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package servlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import javax.servlet.http.HttpSession;
import bean.*;
import java.sql.SQLException;
import DB.newstypeDAO;

public class NewstypeServlet 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");

        newstypeDAO cot = new newstypeDAO();
        newstypeBean bean = new newstypeBean();

        try {

            if (type.equals("add")) {

                String kindname = request.getParameter("kindname");
                String name = request.getParameter("typename");

                bean.setKindname(kindname);
                bean.setName(name);

                //增加动作
                boolean host = false;

                ArrayList list = (ArrayList) cot.getnewstype();
                host = cot.insterfirst(bean);
                //判断添加是否正确
                if (host == true) {
                    request.setAttribute("list", list);
                    RequestDispatcher dis = request.getRequestDispatcher(
                            "main/newstypelist.jsp");
                    dis.forward(request, response);
                }
            }
            if (type.equals("leibei")) {
                //显示新闻的列表
                ArrayList list = (ArrayList) cot.getnewstype();
                request.setAttribute("list", list);
                RequestDispatcher dis = request.getRequestDispatcher(
                        "main/newstypelist.jsp");
                dis.forward(request, response);
            }
            if (type.equals("del")) {
                //删除动作
                boolean flat = false;
                String newstypeid[] = request.getParameterValues("check");

                //循环得到被选中的ID号
                for (int i = 0; i < newstypeid.length; i++) {
                    bean.setID(newstypeid[i]);
                    if(!cot.delectnewstype(bean))
                   {
                       flat=false;
                       break;
                   }

                }
                flat = cot.delectnewstype(bean);
                //判断删除是否成功
                if (flat == true) {
                    ArrayList list = (ArrayList) cot.getnewstype();
                    request.setAttribute("list", list);
                    RequestDispatcher dis = request.getRequestDispatcher(
                            "main/newstypelist.jsp");
                    dis.forward(request, response);

                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }


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

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