oprater.java

jsp+servlet+javaBean实现MVC

package com.wang.servlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.wang.bean.*;

/*
 处理用户操作的servlet
 */
public class Oprater
    extends HttpServlet
{
    private static final String CONTENT_TYPE = "text/html; charset=GBK";
    public void init()
        throws ServletException
    {
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
    {
        if (request.getParameter("action") != null) //判断操作类型
        {
            String action = request.getParameter("action");
            if (action.equals("add")) //添加操作
            {
                request.getSession().removeAttribute("selectList");
                response.sendRedirect("add.jsp");
            }
            else if (action.equals("select")) //查询/编辑操作
            {
                request.getSession().removeAttribute("selectList");
                response.sendRedirect("select.jsp");
            }
            else if (action.equals("out")) //注销操作
            {
                request.getSession().removeAttribute("selectList");
                request.getSession().removeAttribute("user");
                UserBean ub=null;
                request.getSession().setAttribute("user",ub);
                response.sendRedirect("login.jsp");
            }
            else if (action.equals("chenge")) //修改用户信息操作
            {
                request.getSession().removeAttribute("selectList");
                response.sendRedirect("chenge.jsp");
            }
        }
    }

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

    public void destroy()
    {
    }
}