Login

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import java.sql.*;
import java.util.*;

public class Login {
public static void main(String[] args) throws Exception {
// 输入用户名和密码
Scanner sc = new Scanner(System.in);
System.out.println("请输入账号");
String name = sc.nextLine();
System.out.println("请输入密码");
String mm = sc.nextLine();

Class.forName("com.mysql.jdbc.Driver");
String jdbc = "jdbc:mysql://127.0.0.1:3306/myschool";
Connection conn = DriverManager.getConnection(jdbc, "root", "hbtt");
String sql = "select * from student where studentName=? and LoginPwd=?";// sql语句
PreparedStatement state = conn.prepareStatement(sql);// 容器
state.setString(1, name);// 将第n个值替换成某个值
state.setString(2, mm);
ResultSet re = state.executeQuery();// 上传数据库返回结果集

if (re.next()) { // 如果取到了值，那么输出
System.out.println("登陆成功" + re.getString(3) + "，欢迎你");
} else {

System.out.println("登陆失败，账号或密码输入错误");
}

}
}

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