adminmodifypwd.java

功能描述 1） 后台：管理员负责对整个论坛进行管理

package bbs.servlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.db.DBAccess;

public class AdminModifyPwd
    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);
    PrintWriter out = response.getWriter();
    //获得旧的和新的用户名和密码
    String oldname = request.getParameter("oldname");
    String oldpwd = request.getParameter("oldpassword");
    String newname = request.getParameter("newname");
    String newpwd = request.getParameter("newpassword");

    try {
      DBAccess db = new DBAccess();
      //判断原用户名和密码是否正确；如果正确就修改，否则系统不修改
      if (db.checkUser(oldname, oldpwd)) {
        if (db.updateUser(oldname, newname, newpwd) > 0) {
          request.setAttribute("message", "恭喜，修改密码成功！");
          request.getRequestDispatcher("adminmodifypwd.jsp").forward(request,
              response);
          return;
        }
        else {
          request.setAttribute("message", "修改密码失败！");
          request.getRequestDispatcher("adminmodifypwd.jsp").forward(request,
              response);
          return;
        }
      }
      else {
        request.setAttribute("message", "原用户名或密码错误！");
        request.getRequestDispatcher("adminmodifypwd.jsp").forward(request,
            response);
        return;
      }
    }
    catch (Exception ex) {
      ex.printStackTrace();
      request.setAttribute("message", "数据库操作发生错误！");
      request.getRequestDispatcher("error.jsp").forward(request, response);
    }
    out.close();
  }

  //Process the HTTP Post request
  public void doPost(HttpServletRequest request, HttpServletResponse response) throws
      ServletException, IOException {
    doGet(request, response);
  }

  //Clean up resources
  public void destroy() {
  }
}