userinfodao.java

网上购物源代码

/**
 * 
 */
package com.chinaaccpDao;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;

/**
 * @author liu
 *
 */
public class UserInfoDao {

	public String GetUserInfo(String name,String password)
	{
		
		Connection con = null;
		boolean bool = false;
		try {
			con = ConnectionLee.GetCon();
			Statement st = con.createStatement();
			String sql = "select Logname,password from UserInfo";
			ResultSet rs = st.executeQuery(sql);
			while(rs.next())
			{
				String pass = null;
				if(name.equals(rs.getString(1)))
				{
					pass =rs.getString(2);
					System.out.println(pass);
					if(pass.equals(password))
					{
						bool = false;
						String success = "登陆成功";
						return success;
					}
					else
					{
						bool = false;
						String failure2 = "密码错误";
						return failure2;
					}
					
				}
				else
					bool = true;
				
			}
			if(bool)
			{
				System.out.println(name);
				String failure = "没有该用户";
				return failure;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		String DBError = "数据库错误";
		return DBError;
	}
}