newsservlet.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 DB.*;
import java.sql.SQLException;
import java.util.*;


public class NewsServlet 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");
        //newsDAO operation = new newsDAO();

        newsDAO cot = new newsDAO();

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

                //获取页面输入的内容
                newsBean cbean = new newsBean();
                String name = new String(formatStr(request.getParameter(
                        "kindname")));
                String newsname = new String(formatStr(request.getParameter(
                        "newsname")));
                String newsouter = new String(formatStr(request.getParameter(
                        "newsouter")));
                String newspath = new String(formatStr(request.getParameter(
                        "newspath")));

                cbean.setNewsname(newsname);
                cbean.setNewsouter(newsouter);
                cbean.setNewspath(newspath);
                cbean.setKindID(name);

                //增加动作
                boolean flat = false;
                flat = cot.instersecond(cbean);

                //判断是否输入成功
                if (flat == true) {
                    ArrayList list = (ArrayList) cot.getnewstitle();
                    request.setAttribute("list", list);
                    javax.servlet.RequestDispatcher dis = request.
                            getRequestDispatcher(
                                    "main/looknews.jsp");
                    dis.forward(request, response);
                }
            }
            if (type.equals("del")) {
                //删除动作
                boolean flat = true;
                String newsid[] = request.getParameterValues("check");
                newsBean bean = new newsBean();
                //循环得到被选中的ID号
                for (int i = 0; i < newsid.length; i++) {
                    bean.setID(newsid[i]);
                    if(!cot.delectnews(bean))
                   {
                       flat=false;
                       break;
                   }

                }
                flat = cot.delectnews(bean);
                //判断是否删除成功
                if (flat == true) {
                    ArrayList list = (ArrayList) cot.getnewstitle();
                    request.setAttribute("list", list);
                    RequestDispatcher dis = request.getRequestDispatcher(
                            "main/looknews.jsp");
                    dis.forward(request, response);

                }
            }
            if (type.equals("xinwenguanli")) {

                //显示新闻的列表
                ArrayList list = (ArrayList) cot.getnewstitle();
                request.setAttribute("list", list);
                RequestDispatcher dis = request.getRequestDispatcher(
                        "main/looknews.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() {
    }

    //格式化获取参数
    public String formatStr(String str) {
        return str == null ? "" : str;
    }

}