今天依旧是数据库
public class DBOpenHelper { private static String driver = "com.mysql.jdbc.Driver"; private static String url = "jdbc:mysql://localhost:3306/test?characterEncoding=utf-8"; private static String user = "root";//用户名 private static String password = "root";//密码 public static Connection getConn(){ Connection conn = null; try { Class.forName(driver); conn = (Connection) DriverManager.getConnection(url,user,password);//获取连接 } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } return conn; } //登录的查询 public static boolean loginByAccount(String username,String password) { Connection conn = getConn(); String sql = "select *from account where username = ? and password = ? "; if (conn != null) {//进行查询是否有该用户 try { PreparedStatement ps = conn.prepareStatement(sql); ps.setString(1,username); ps.setString(2,password); ResultSet rs = ps.executeQuery(); if (rs != null) { return true; } } catch (SQLException e) { e.printStackTrace(); } } return false; } }