新闻发布|基于JavaWeb实现新闻发布管理系统+论文+PPT（二）

package com.action;
/**
 * 管理员登陆 增加 修改 删除 删除登陆日志
 */
import java.io.IOException;
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.AdminBean;
import com.bean.SystemBean;
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);
    try{
      String method=request.getParameter("method").trim();
      AdminBean loginbean = new AdminBean();
      HttpSession session = request.getSession();
      session.setMaxInactiveInterval(1200);
      SystemBean systembean = new SystemBean();
      String sysdir = systembean.getDir();
      if(method.equals("one")){//管理员登录
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        if(username == null||username.trim().equals("")){
          request.setAttribute("message", "请正确输入用户名！");
          request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);
        }
        else if(password == null||password.trim().equals("")){
          request.setAttribute("message", "请输入密码！");
          request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);
        }
        else{
          String md5password = MD5.MD5(password);
          String agent = request.getHeader("user-agent"); 
          StringTokenizer st = new StringTokenizer(agent,";"); 
          String useros=st.nextToken();
          String loginip = request.getRemoteAddr();     
          int flag = loginbean.adminLogin(username,md5password, password,useros,loginip);
          switch (flag){
            case Constant.SUCCESS:
              List list = loginbean.getAdminInfo(username);
              session.setAttribute("user", username);
              session.setAttribute("list", list);
              request.getRequestDispatcher(sysdir+"/").forward(request, response);
              break;
            case Constant.NAME_ERROR:
              request.setAttribute("message", "用户名错误！请确认管理权限！");
              request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);
              break;
            case Constant.PASSWORD_ERROR:
              request.setAttribute("message", "密码错误，请确认管理权限！");
              request.getRequestDispatcher(sysdir+"/login.jsp").forward(request, response);
              break;
          }
        }
      }
      else if(method.equals("editpwd")){//修改密码
        String username2 = (String)session.getAttribute("user");
        if(username2 == null){
          request.getRequestDispatcher("error.jsp").forward(request, response);
        }
        else{
          String oldpwd = MD5.MD5(request.getParameter("oldpwd").trim());
          String newpwd = MD5.MD5(request.getParameter("newpwd").trim());
          String username = (String)session.getAttribute("user");
          int flag = loginbean.editPassword(username, oldpwd, newpwd);
          switch (flag){
            case Constant.SUCCESS:
              request.setAttribute("message", "密码修改成功！");
              request.getRequestDispatcher(sysdir+"/system/editpwd.jsp").forward(request, response);
              break;
            case Constant.PASSWORD_ERROR:
              request.setAttribute("message", "原始密码错误，请确认权限！");
              request.getRequestDispatcher(sysdir+"/system/editpwd.jsp").forward(request, response);
              break;
            case Constant.SYSTEM_ERROR:
              request.setAttribute("message", "系统维护中，请稍后再试！");
              request.getRequestDispatcher(sysdir+"/system/editpwd.jsp").forward(request, response);
              break;
          }
        }   
      }
      else if(method.equals("exit")){//退出
        String username2 = (String)session.getAttribute("user");
        if(username2 == null){
          request.getRequestDispatcher("error.jsp").forward(request, response);
        }
        else{
          session.removeAttribute("user");
          session.removeAttribute("list");
          System.gc();
          request.getRequestDispatcher("index.jsp").forward(request, response);
        }     
      }
      else if(method.equals("manager")){//增加管理员
        String username2 = (String)session.getAttribute("user");
        if(username2 == null){
          request.getRequestDispatcher("error.jsp").forward(request, response);
        }
        else{
          String ra = request.getParameter("ra").trim();
          if(ra.equals("add")){
            String username = request.getParameter("username").trim();
            String password = MD5.MD5(request.getParameter("password").trim());
            String isuse = request.getParameter("isuse").trim();
            if(isuse.equals("在用"))
              isuse = "1";
            else
              isuse = "2";
            int flag = loginbean.addManager(username, password, "2", isuse);
            if(flag == Constant.SUCCESS){
              request.setAttribute("message", "增加管理员成功！");
              request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);
            }
            else if(flag == Constant.SAME_NAME){
              request.setAttribute("username", username);
              request.setAttribute("message", "该用户名已经存在！");
              request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);
            }
            else{
              request.setAttribute("message", "系统维护中，请稍后再试！");
              request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);
            }   
          }
          else if(ra.equals("update")){
            String username = request.getParameter("username").trim();
            String password = request.getParameter("password").trim();
            String isuse = request.getParameter("isuse").trim();
            if(!password.equals("")){
              password = MD5.MD5(password);
            }
            if(isuse.equals("在用"))
              isuse = "1";
            else
              isuse = "2";
            int flag = loginbean.updateManager(username, password, "2", isuse);
            if(flag == Constant.SUCCESS){
              request.setAttribute("message", "修改管理员信息成功！");
              request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);
            } 
            else{
              request.setAttribute("message", "系统维护中，请稍后再试！");
              request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);
            }   
          }
        }
      }
      else if(method.equals("delm")){//删管理员
        String username2 = (String)session.getAttribute("user");
        if(username2 == null){
          request.getRequestDispatcher("error.jsp").forward(request, response);
        }
        else{
          int id = Integer.parseInt(request.getParameter("id").trim());
          if(id == 1){
            request.setAttribute("message", "不能删除原始帐号！");
            request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);
          }
          else{
            int flag = loginbean.delManager(id);
            if(flag == Constant.SUCCESS){
              request.setAttribute("message", "删除成功！");
              request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);
            } 
            else{
              request.setAttribute("message", "系统维护中，请稍后再试！");
              request.getRequestDispatcher(sysdir+"/system/user.jsp").forward(request, response);
            } 
          }
        }     
      }
      else if(method.equals("dellog")){//delete login note
        String username2 = (String)session.getAttribute("user");
        if(username2 == null){
          request.getRequestDispatcher("error.jsp").forward(request, response);
        }
        else{
          String check[] = request.getParameterValues("checkit");
          if(check == null){
            request.setAttribute("message", "请选择要删除的记录！");
            request.getRequestDispatcher(sysdir+"/system/log.jsp").forward(request, response);
          }
          else{
            int id[]= new int[check.length];
            for(int i = 0;i<check.length;i++){
              int s = Integer.parseInt(check[i]);       
              id[i] = s;
            }
            int flag = loginbean.delLog(id);
            if(flag == Constant.SUCCESS){
              request.setAttribute("message", "删除记录成功！");
              request.getRequestDispatcher(sysdir+"/system/log.jsp").forward(request, response);
            }
            else{
              request.setAttribute("message", "系统维护中，请稍后再试！");
              request.getRequestDispatcher(sysdir+"/system/log.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
  }
}