核心servlet代码

package com.jxnd.servlet;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.jxnd.bean.StuBean;
import com.jxnd.biz.IStuBiz;
import com.jxnd.biz.StuBizImpl;
import com.jxnd.tools.Tools;


@WebServlet("/UsersServlet")
@SuppressWarnings("all")
public class UsersServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	IStuBiz biz = new StuBizImpl();
	Class c = UsersServlet.class;
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		//设置编码格式
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		//获取方法类型
		String type = request.getParameter("type");
		try {
			Method me = c.getMethod(type, HttpServletRequest.class,HttpServletResponse.class);
			me.invoke(this, request,response);
		} catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
			e.printStackTrace();
		}
	}
	/**
	 * 修改密码的方法
	 * @param request
	 * @param response
	 * @throws ServletException
	 * @throws IOException
	 */
	public void updatePassword(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
		StuBean bean = (StuBean) request.getSession().getAttribute("bean");
		String stuName = bean.getStuName();
		String op = request.getParameter("op");
		String np = request.getParameter("np1");
		String msg = "";
		int i = biz.updatePassword(stuName, op, np);
		if(i == 3){
			bean.setPassword(np);
			request.getSession().setAttribute("bean", bean);
			response.sendRedirect("UsersServlet?type=getStuPage&pageIndex=1");
			return;
		}if(i == 1){
			msg = "原始密码错误！";
		}if(i == 2){
			msg = "服务器错误！";
		}
		request.setAttribute("errorMsg", msg);
		request.getRequestDispatcher("/updatePassword.jsp").forward(request, response);
	}
	/**
	 * 分页的方法
	 * @param request
	 * @param response
	 * @throws ServletException
	 * @throws IOException
	 */
	public void getStuPage(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
		StuBean bean = new StuBean();
		//获取传过来的页数指针以及页数大小
		int pageIndex = Integer.parseInt(request.getParameter("pageIndex"));
		int pageSize = Integer.parseInt(request.getParameter("pageSize")==null?"10":request.getParameter("pageSize"));
		int count = biz.getCount(bean);
		List
 
   list = biz.getStuPage(pageIndex, pageSize);
		request.setAttribute("list", list);
		request.setAttribute("pageIndex", pageIndex);
		request.setAttribute("pageSize", pageSize);
		request.setAttribute("count", count);
		request.setAttribute("pageMsg", Tools.paging(count, pageSize, pageIndex, "UsersServlet?type=getStuPage"));
		request.getRequestDispatcher("success.jsp").forward(request, response);
	}
	/**
	 * 登录
	 * @param request
	 * @param response
	 * @throws ServletException
	 * @throws IOException
	 */
	public void login(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
		//获取表单中的数据
		String stuName = request.getParameter("stuName");
		String password = request.getParameter("password");
		StuBean bean = new StuBean();
		//封装表单数据
		bean.setStuName(stuName);
		bean.setPassword(password);
		//基本验证
		if(stuName != null && !"".equals(stuName) && password != null && !"".equals(password)){
			//内容验证，过滤非法文字，此处省略......
			//boolean flag = biz.login(stuName, password);
			boolean flag = biz.conn(bean);
			if(flag){
				request.getSession().setAttribute("bean", bean);
				response.sendRedirect("/StudentProject/UsersServlet?type=getStuPage&pageIndex=1&pageSize=10");
			}else{
				request.getRequestDispatcher("error.jsp").forward(request, response);
			}
		}
	}
	/**
	 * 封装数据，将数据放到修改页面中
	 * @param request
	 * @param response
	 * @throws ServletException
	 * @throws IOException
	 */
	public void updateStuServlet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
		//获取一个StuBean对象***
		StuBean bean = new StuBean();
		//获取业务逻辑功能类
		IStuBiz biz = new StuBizImpl();
		//获取修改对象的ID
		int id = Integer.parseInt(request.getParameter("id"));
		//获取数据BEAN
		//StuBean bean = biz.findUserById(id);
		bean = biz.getBean(bean, id);
		//将数据BEAN设置到request内置对象中
		request.setAttribute("bean", bean);
		//跳转到相应的jsp页面中
		request.getRequestDispatcher("update.jsp").forward(request, response);
	}
	/**
	 * 根据id删除数据
	 * @param request
	 * @param response
	 * @throws ServletException
	 * @throws IOException
	 */
	public void delStuById(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
		//获取一个StuBean对象
		StuBean bean = new StuBean();
		//获取表单数据
		int id = Integer.parseInt(request.getParameter("id").trim());
		bean.setId(id);
		//int flag = biz.delStuById(id);
		int flag = biz.deleteById(bean);
		if(flag > 0){
			request.getRequestDispatcher("UsersServlet?type=getStuPage").forward(request, response);
		}
	}
	/**
	 * 注册功能
	 * @param request
	 * @param response
	 * @throws ServletException
	 * @throws IOException
	 */
	public void register(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
		//获取一个StuBean对象
		StuBean bean = new StuBean();
		//获取表单中的数据
		bean.setId(Integer.parseInt(request.getParameter("id")));
		bean.setStuName(request.getParameter("stuName"));
		bean.setPassword(request.getParameter("password"));
		bean.setSex(request.getParameter("sex"));
		boolean flag = biz.register(bean);
		if(flag){
			request.setAttribute("msg", "注册成功！");
			request.getRequestDispatcher("login.jsp").forward(request, response);
		}else{
			request.getRequestDispatcher("error2.jsp").forward(request, response);
		}
	}
	/**
	 * 修改数据
	 * @param request
	 * @param response
	 * @throws ServletException
	 * @throws IOException
	 */
	public void modifyStu(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
		//创建一个数据BENA
		StuBean bean = new StuBean();
		//封装表单中的数据
		bean.setStuName(request.getParameter("stuName"));
		bean.setPassword(request.getParameter("password"));
		bean.setSex(request.getParameter("sex"));
		//获取表单中ID
		int id = Integer.parseInt(request.getParameter("id"));
		bean.setId(id);
		int pageIndex = Integer.parseInt(request.getParameter("pageIndex"));
		int pageSize = Integer.parseInt(request.getParameter("pageSize"));
		//boolean flag = biz.modifyStu(bean, id);
		int flag = biz.modifyById(bean);
		if(flag>0){
			request.getRequestDispatcher("UsersServlet?type=getStuPage&pageIndex="+pageIndex+"&pageSize="+pageSize).forward(request, response);
		}
	}

}