养老院管理系统|基于JavaWeb开发实现养老院管理系统

package com.action;
/**
 * 管理员登陆 增加 修改 删除  
 */
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.List;
import java.util.StringTokenizer;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.bean.ComBean; 
import com.util.Constant;
import com.util.MD5;
public class AdminServlet extends HttpServlet {
  /**
   * Constructor of the object.
   */
  public AdminServlet() {
    super();
  }
  /**
   * Destruction of the servlet. <br>
   */
  public void destroy() {
    super.destroy(); // Just puts "destroy" string in log
    // Put your code here
  }
  /**
   * The doGet method of the servlet. <br>
   *
   * This method is called when a form has its tag value method equals to get.
   * 
   * @param request the request send by the client to the server
   * @param response the response send by the server to the client
   * @throws ServletException if an error occurred
   * @throws IOException if an error occurred
   */
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    doPost(request,response);
  }
  /**
   * The doPost method of the servlet. <br>
   *
   * This method is called when a form has its tag value method equals to post.
   * 
   * @param request the request send by the client to the server
   * @param response the response send by the server to the client
   * @throws ServletException if an error occurred
   * @throws IOException if an error occurred
   */
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    response.setContentType(Constant.CONTENTTYPE);
    request.setCharacterEncoding(Constant.CHARACTERENCODING);
    String date=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime());
    String date2=new SimpleDateFormat("yyyy-MM-dd").format(Calendar.getInstance().getTime());
    try{
      String method=request.getParameter("method").trim();
      ComBean cBean = new ComBean();
      HttpSession session = request.getSession();   
      if(method.equals("one")){//用户登录
        String username = request.getParameter("username");
        String password = request.getParameter("password");  
        String sf = request.getParameter("sf");  
        String sql="select realname from admin where username='"+username+"' and  password='"+password+"'  and  sf='"+sf+"' ";
        String str=cBean.getString(sql);
        if(str==null){
          request.setAttribute("message", "登录信息错误！");
          request.getRequestDispatcher("index.jsp").forward(request, response); 
        }
        else{
          session.setAttribute("user", username); 
          session.setAttribute("sf", sf); 
          request.getRequestDispatcher("admin/index.jsp").forward(request, response); 
        }  
      }
      else if(method.equals("uppwd")){//修改密码
        String username=(String)session.getAttribute("user"); 
        String oldpwd = request.getParameter("oldpwd"); 
        String newpwd = request.getParameter("newpwd"); 
        String str=cBean.getString("select id from admin where username='"+username+"' and  password='"+oldpwd+"'");
        if(str==null){
          request.setAttribute("message", "原始密码信息错误！");
          request.getRequestDispatcher("admin/system/editpwd.jsp").forward(request, response); 
        }
        else{
          int flag=cBean.comUp("update admin set password='"+newpwd+"' where username='"+username+"'");
          if(flag == Constant.SUCCESS){ 
            request.setAttribute("message", "操作成功！");
            request.getRequestDispatcher("admin/system/editpwd.jsp").forward(request, response); 
          }
          else { 
            request.setAttribute("message", "操作失败！");
            request.getRequestDispatcher("admin/system/editpwd.jsp").forward(request, response); 
          }
        }
      }
      else if(method.equals("adminexit")){//退出登录
        session.removeAttribute("user");  session.removeAttribute("sf");
        request.getRequestDispatcher("index.jsp").forward(request, response); 
      }
      else if(method.equals("addm")){//增加系统用户
        String username = request.getParameter("username"); 
        String password = request.getParameter("password"); 
        String realname = request.getParameter("realname"); 
        String sex = request.getParameter("sex"); 
        String age = request.getParameter("age"); 
        String address = request.getParameter("address"); 
        String tel = request.getParameter("tel"); 
        String str=cBean.getString("select id from admin where username='"+username+"'");
        if(str==null){ 
            int flag=cBean.comUp("insert into admin(username,password,realname,sex,age,address,tel,addtime ) " +
                "values('"+username+"','"+password+"','"+realname+"','"+sex+"','"+age+"','"+address+"','"+tel+"','"+date+"' )");
            if(flag == Constant.SUCCESS){ 
              request.setAttribute("message", "操作成功！");
              request.getRequestDispatcher("admin/system/index.jsp").forward(request, response); 
            }
            else { 
              request.setAttribute("message", "操作失败！");
              request.getRequestDispatcher("admin/system/index.jsp").forward(request, response); 
            } 
        }
        else{
          request.setAttribute("message", "该用户名已存在！");
          request.getRequestDispatcher("admin/system/index.jsp").forward(request, response); 
        } 
      }
      else if(method.equals("upm")){//修改系统用户
        String id = request.getParameter("id");
        String password = request.getParameter("password");
        String realname = request.getParameter("realname"); 
        String sex = request.getParameter("sex"); 
        String age = request.getParameter("age"); 
        String address = request.getParameter("address"); 
        String tel = request.getParameter("tel");  
        int flag=cBean.comUp("update admin set password='"+password+"',realname='"+realname+"',sex='"+sex+"',age='"+age+"'," +
            "address='"+address+"',tel='"+tel+"' where id='"+id+"'");
        if(flag == Constant.SUCCESS){ 
          request.setAttribute("message", "操作成功！");
          request.getRequestDispatcher("admin/system/index.jsp").forward(request, response); 
        }
        else { 
          request.setAttribute("message", "操作失败！");
          request.getRequestDispatcher("admin/system/index.jsp").forward(request, response); 
        }
      }
      else if(method.equals("delm")){//删除系统用户
        String id = request.getParameter("id");  
        int flag=cBean.comUp("delete from admin where id='"+id+"'");
        if(flag == Constant.SUCCESS){ 
          request.setAttribute("message", "操作成功！");
          request.getRequestDispatcher("admin/system/index.jsp").forward(request, response); 
        }
        else { 
          request.setAttribute("message", "操作失败！");
          request.getRequestDispatcher("admin/system/index.jsp").forward(request, response); 
        }
      } 
      else{//无参数传入转到错误页面
        request.getRequestDispatcher("error.jsp").forward(request, response);
      }
    }catch(Exception e){
      e.printStackTrace();
      request.getRequestDispatcher("error.jsp").forward(request, response);
    }
  }
  /**
   * Initialization of the servlet. <br>
   *
   * @throws ServletException if an error occure
   */
  public void init() throws ServletException {
    // Put your code here
  }
}