loginimp.java

订餐系统

package Biz;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.*;
import java.util.*;
import Dao.*;
import javax.servlet.jsp.jstl.sql.Result;
import java.io.IOException;
import java.lang.Exception;

public class loginImp implements BizInterface {
	
	public String execute(HttpServletRequest request,HttpServletResponse response)
	{
		
		
		String name = (String) request.getParameter("loginName");			
		String pass = (String) request.getParameter("loginPass");
		String path = "";
		try
		{
			Connection conn = ConnectionManage.getConnection();
			String sql = "select UserPass from users where UserName = '"+name+"'";
			SQLCommandBean sqlCommandBean = new SQLCommandBean();
			sqlCommandBean.setConn(conn);
			sqlCommandBean.setSqlValue(sql);
			Result result = sqlCommandBean.executeQuery();
			if(result == null || result.getRowCount() == 0)
			{
				
				request.setAttribute("message",new Exception("数据库错误：登陆-没有记录") );				
			}
			else
			{
			
				Map m = result.getRows()[0];
				String newPass = m.get("UserPass").toString();
				if(newPass.equals(pass))
				{
					path = "show.jsp";
				}
			}
		}
		catch(Exception ex)
		{
			request.setAttribute("message",new Exception("数据库错误：登陆出错了") );
	        path="message.jsp";
		}
		return path;
	}

}