usersclservlet.java

这事本人自己开发的用户管理方面的Java程序

//这个控制器，将处理用户的分页显示，用户的删除，修改、添加...
package com.sp.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sp.model.*;
public class UsersClServlet extends HttpServlet {

	/**
	 * 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 {

		
		//获得标识值
		String flag=request.getParameter("flag");
		
		//如果是要分页显示用户信息
		if(flag.equals("fengye")){
				//得到用户希望显示的pageNow;
				
				
				try {
					
					System.out.println("分页是用的userclSerlvet");
					int pageNow=Integer.parseInt(request.getParameter("pageNow"));
					//调用UserBeanCl
					UserBeanCl ubc=new UserBeanCl();
					
		//			在跳转到wel.jsp页面时，就把要显示的数据，给wel.jsp
					//准备好
					ArrayList al=ubc.getUsersByPage(pageNow);
					int pageCount=ubc.getPageCount();
					//将al,pageCount,pageNow放入request中
					request.setAttribute("result", al);
					request.setAttribute("pageCount", pageCount+"");
					request.setAttribute("pageNow", pageNow+"");
					
					//重新调转回wel.jsp
					request.getRequestDispatcher("wel.jsp").forward(request, response);
					
					
				} catch (Exception e) {
					e.printStackTrace();
					// TODO: handle exception
				}
		
		}else if(flag.equals("delUser")){
			
			
			//完成删除
			//1.得到要删除的用户的id（驼峰法，匈牙利法）
			String userId=request.getParameter("userId");
			
			//创建UserBeanCl
			UserBeanCl ubc=new UserBeanCl();
			
			
			
			if(ubc.delUserById(userId)){
				
				//删除成功!
				
				request.getRequestDispatcher("suc.jsp").forward(request, response);
			}else{
				//不成功!
				request.getRequestDispatcher("err.jsp").forward(request, response);
			}
		}
		else if(flag.equals("addUser")){
			
			
			//完成添加用户
			//得到用户输入的信息
			String name=request.getParameter("userName");
			String passwd=request.getParameter("passwd");
			String email=request.getParameter("email");
			String grade=request.getParameter("grade");
			
			//创建UserBeanCl
			UserBeanCl ubc=new UserBeanCl();
			
			
			
			if(ubc.addUser(name, passwd, email, grade)){
				
				//添加成功!
				
				request.getRequestDispatcher("suc.jsp").forward(request, response);
			}else{
				//不成功!
				request.getRequestDispatcher("err.jsp").forward(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 {

	this.doGet(request, response);
	}

}