msgservlet.java

新闻管理系统

/*
 * Created on 2009-4-23
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package cn.edu.zucc.news.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;

/**
 * @author Administrator
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
/*
 * Created on 2007-4-16
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */


import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.edu.zucc.news.model.*;


/**
 * @author wengwy
 * 
 * TODO To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
public class MsgServlet extends HttpServlet {
    private MsgDAO dao = new MsgDAO();
   
    

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        //TODO Method stub generated by Lomboz
        this.doPost(request, response);
    }
    
    /*private String logincheck(HttpServletRequest request) {
        try {
            String userid=request.getParameter("userid");
            if(userid==null ||userid.equals(""))
                throw new Exception("请输入用户名");
            String pwd=request.getParameter("pwd");
            if(pwd==null)pwd="";
            WebUser user=dao.readUser(userid);
            if(user==null) 
                throw new Exception("用户不存在");
            if(!pwd.equals(user.getPwd()))
                throw new Exception("密码错误");
            request.getSession().setAttribute("username",user.getUsername());
            if("admin".equals(user.getUsertype()))
               return "/manager.jsp";
            else
                return "/editor.jsp";
        } catch (Exception ex) {
            request.setAttribute("errormsg", ex.getMessage());
            return "/login.jsp";
        }
    }*/

    private String Msglist(HttpServletRequest request) {
        try {
            request.setAttribute("objlist", dao.loadAllMsgs());
            
            return "/Msg_list.jsp";
        } catch (Exception ex) {
            request.setAttribute("errormsg", ex.getMessage());
            return "/error.jsp";
        }
    }
    private String MangMsglist(HttpServletRequest request) {
        try {
            request.setAttribute("objlist", dao.loadAllMsgs());
            
            return "/MangMsg_list.jsp";
        } catch (Exception ex) {
            request.setAttribute("errormsg", ex.getMessage());
            return "/error.jsp";
        }
    }

    private String addMsg(HttpServletRequest request) {
        request.setAttribute("obj", new Msg());
        return "/Msg_edit.jsp";
    }

    private String addMsgresult(HttpServletRequest request) {
        Msg msg = new Msg();
        msg.SetMsg(request.getParameter("msg"));
        //msg.SetMsg_id(request.getParameter("msg_id"));
       // msg.setSend_time(request.getParameter("send_time"));
        msg.SetUserid(request.getParameter("userid"));
        try {
            this.dao.addMsg(msg);
            return this.Msglist(request);
        } catch (Exception ex) {
            request.setAttribute("errormsg", ex.getMessage());
            return "/error.jsp";
        }

    }

    private String modifyMsg(HttpServletRequest request) {
        try {
        	Msg msg  = this.dao.readMsg(request.getParameter("msg_id"));
            //user.setMethod("modifyuserresult");
            request.setAttribute("obj", msg);
            return "/user_edit.jsp";
        } catch (Exception ex) {
            request.setAttribute("errormsg", ex.getMessage());
            return "/error.jsp";
        }
    }

    private String modifyMsgresult(HttpServletRequest request) {
        Msg msg = new Msg();
        //DateFormat fmt =new SimpleDateFormat("yyyy-MM-dd"); 
       // String s = request.getParameter("send_time"); 
       // Date date = fmt.parse(s); 
        
        msg.SetMsg(request.getParameter("msg"));
        msg.SetMsg_id(Integer.parseInt(request.getParameter("msg_id")));
      //  msg.setSend_time(date);
        msg.SetUserid(request.getParameter("userid"));
        try {
            this.dao.saveMsg(msg);
            return this.Msglist(request);
        } catch (Exception ex) {
            request.setAttribute("errormsg", ex.getMessage());
            return "/error.jsp";
        }
    }

    private String deleteMsg(HttpServletRequest request) {
        try {
        	int s=Integer.parseInt(request.getParameter("msg_id"));
        	System.out.println(s);
            this.dao.delMsg(s);
            return this.Msglist(request);
        } catch (Exception ex) {
            request.setAttribute("errormsg", ex.getMessage());
            return "/error.jsp";
        }
    }
    
    private String deleteAllMsg(HttpServletRequest request) {
        try { 
        	String[] choices =request.getParameterValues("checkbox");
        	
	        	for(int i=0;i<choices.length;i++){
	        		int s=Integer.parseInt(choices[i]);
	        		this.dao.delMsg(s);}
	        		return this.MangMsglist(request);	
	        
        	
        } catch (Exception ex) {
            request.setAttribute("errormsg", ex.getMessage());
            return "/error.jsp";
        }
    }
    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("gbk");
        String method = request.getParameter("method");
        if (method == null)  method = "list";
        String result = "";
        if (method.equals("addMsg"))
            result = addMsg(request);
        else if (method.equals("addMsgresult"))
            result = addMsgresult(request);
        else if (method.equals("modifyMsg"))
            result = modifyMsg(request);
        else if (method.equals("modifyMsgresult"))
            result = modifyMsgresult(request);
        else if (method.equals("deleteMsg"))
            result = deleteMsg(request);
        else if (method.equals("deleteAllMsg"))
            result = deleteAllMsg(request);        
        else if (method.equals("MangMsglist"))
            result = this.MangMsglist(request);
        else
            result = Msglist(request);
        RequestDispatcher dispatcher = request.getSession().getServletContext()
                .getRequestDispatcher(result);
        if (dispatcher != null)
            dispatcher.forward(request, response);
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.Servlet#destroy()
     */
    public void destroy() {
        // TODO Auto-generated method stub
        dao.release();
        super.destroy();
    }

}