import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.junit.Test;
public class connection {	
/*
 * mysql> create table custom(
    -> id int primary key auto_increment,
    -> uname varchar(16) not null, 
    -> upass varchar(16) not null
    -> );
 */
 

	public void login(String username,String userpassword) throws ClassNotFoundException, SQLException{
//		1.註冊驅動
		Class.forName("com.mysql.jdbc.Driver");
//		2.得到連線
		Connection connection= DriverManager.getConnection("jdbc:mysql://localhost:3306/eclipse_database", "root", "123456");
//		3.編寫sql語句(使用佔位符而不使用字元拼接)
 

		String sql="select * from customer where uname=? and upass=? ";
//		4.建立預處理物件
		PreparedStatement preparedStatement=connection.prepareStatement(sql);
//		5.給sql語句中的佔位符設定引數
		preparedStatement.setString(1, username);
		preparedStatement.setString(2, userpassword);
//		6.執行查詢操作
		ResultSet rSet=preparedStatement.
 
executeQuery();
//		7.對結果集進行處理
		if (rSet.next()) {
			System.out.println("恭喜您，" + username + ",登入成功!");
			System.out.println(sql);
		} else {
			System.out.println("賬號或密碼錯誤!");
		}
		if (rSet!=null) {
			rSet.close();
		}
		if (preparedStatement!=null) {
			preparedStatement.close();
		}
		if (connection!=null) {
			connection.close();
		}
		
		
	}
	@Test
	public void testLogin() throws ClassNotFoundException, SQLException{
		login("老王","123456");
	}
	
}