loginservlet.java

能够实现学员的缴费查询

package cn.jiaofei.servlet;

import java.io.* ;
import java.util.* ;
import javax.servlet.* ;
import javax.servlet.http.* ;
import cn.jiaofei.vo.* ;
import cn.jiaofei.factory.*;

public class LoginServlet extends HttpServlet
{
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException
	{
		this.doPost(request,response) ;
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException
	{
		request.setCharacterEncoding("utf-8");
		List errors = new ArrayList() ;
		String path = "login.jsp" ;
		// 1、接收传递的参数
		String username = request.getParameter("username") ;
		String password = request.getParameter("password") ;
		// 2、将请求的内容赋值给VO类
		PersonvoUser personuser = new PersonvoUser() ;
		personuser.setUsername(username);
		personuser.setPassword(password) ;
			try
			{
				// 进行数据库验证
				if(DAOFactory.getPersonDAOInstance().login(personuser))//判断是true还是false
				{
					// 如果为真，则表示用户ID和密码合法
					// 设置用户姓名到session范围之中
					request.getSession().setAttribute("uname",personuser.getName()) ;
					request.getSession().setAttribute("tid",personuser.getTid()) ;
					// 修改跳转路径
					String a = personuser.getType();
			        if(a.equals("管理员"))
					{
						path = "indexadm.jsp" ;
					}
					if(a.equals("老师"))
					{
						path = "indextch.jsp" ;
					}
					if(a.equals("学生"))
					{
						path = "indexstu.jsp" ;
					}
	
				}
				else
				{
					// 登陆失败,设置错误信息
					errors.add("您输入的用户名或密码错误！") ;
				}
				// 将错误信息保存
				
				request.setAttribute("errors",errors) ;
			
			// 进行跳转
			request.getRequestDispatcher(path).forward(request,response) ;
				
			}
			catch(Exception e)
			
			{e.printStackTrace();}
	
	}
}