jsp判断用select读取的数据是否有0

<%
    //加载MySQL驱动
    Class.forName("com.mysql.cj.jdbc.Driver");
    String url = "jdbc:mysql://localhost:3306/new_schema"; //数据库名
    String username = "root";  //数据库用户名
    String password = "1234567890";  //数据库用户密码
    Connection con = DriverManager.getConnection(url, username, password);  //连接状态
    //      判断数据库是否连接成功
    if (con != null){
        System.out.println("数据库连接成功");
        out.print("数据库连接成功！");
    }else {
        System.out.println("数据库连接失败");
    }
    String sql ="SELECT * FROM tb_stu where id in (SELECT stu_id FROM tb_apply where tea_id=1 and status=5)";  //查询语句
    Statement stmt = null;
    ResultSet rs = null;
    stmt = con.createStatement();
    rs = stmt.executeQuery(sql);

    int lastRow=rs.getRow();
    out.print(lastRow);
%>