SpringBoot + Thymeleaf + SQL, display HTML table from database

56
April 12, 2021, at 03:50 AM

I want to create site. I have already configured login "/login" and registration "/registration" pages. The main task of this site is to show schedule for every student. Now I need to display list of subjects on page "/schedule", using HTML-table, according to fields GROUP and COURSE which where picked by student during registration. I have 14 different tables with list of subjects(1 table - one group of students).

  1. Do I need to create @Entity class and Repository for every table?
  2. How to show information for students using data from registration?

Controller of page "/schedule":

@Controller
public class ShedulePageController {
    @GetMapping("/schedule")
    public String schedulePage() {
        return "SchedulePage";
    }
}

Entity for 1 of 14 tables with list of subjects:

@Entity
@Table(name = "f_fit_c2g1")
public class f_fit_c2g1 {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id_f_fit_c2g1;
    @Column(length = 60)
    private String monday;
    @Column(length = 60)
    private String tuesday;
    @Column(length = 60)
    private String wednesday;
    @Column(length = 60)
    private String thursday;
    @Column(length = 60)
    private String friday;
    @Column(length = 60)
    private String monday2;
    @Column(length = 60)
    private String tuesday2;
    @Column(length = 60)
    private String wednesday2;
    @Column(length = 60)
    private String thursday2;
    @Column(length = 60)
    private String friday2;
    public String getMonday2() {
        return monday2;
    }
    public void setMonday2(String monday2) {
        this.monday2 = monday2;
    }
    public String getTuesday2() {
        return tuesday2;
    }
    public void setTuesday2(String tuesday2) {
        this.tuesday2 = tuesday2;
    }
    public String getWednesday2() {
        return wednesday2;
    }
    public void setWednesday2(String wednesday2) {
        this.wednesday2 = wednesday2;
    }
    public String getThursday2() {
        return thursday2;
    }
    public void setThursday2(String thursday2) {
        this.thursday2 = thursday2;
    }
    public String getFriday2() {
        return friday2;
    }
    public void setFriday2(String friday2) {
        this.friday2 = friday2;
    }
    public Long getId_c2g9() {
        return id_f_fit_c2g1;
    }
    public void setId_c2g9(Long id_f_fit_c2g1) {
        this.id_f_fit_c2g1 = id_f_fit_c2g1;
    }
    public String getMonday() {
        return monday;
    }
    public void setMonday(String monday) {
        this.monday = monday;
    }
    public String getTuesday() {
        return tuesday;
    }
    public void setTuesday(String tuesday) {
        this.tuesday = tuesday;
    }
    public String getWednesday() {
        return wednesday;
    }
    public void setWednesday(String wednesday) {
        this.wednesday = wednesday;
    }
    public String getThursday() {
        return thursday;
    }
    public void setThursday(String thursday) {
        this.thursday = thursday;
    }
    public String getFriday() {
        return friday;
    }
    public void setFriday(String friday) {
        this.friday = friday;
    }
}

Every table with subjects has name like this - "f_fit_c#g#" where # - number.

Rerository:

import org.springframework.data.jpa.repository.JpaRepository;
public interface f_fit_c2g1Repository extends JpaRepository<f_fit_c2g1, Long> {
}

My HTML file of "/schedule" page(with random static data):

<html xmlns:th="http://www.thymeleaf.org" lang="en">
<head>
    <title>Table 07</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" type="text/css" th:href="@{/css/style.css}" />
</head>
<body>
<header>
    <div class="small" id="header-scroll">
        <h1><a href="#" style="padding-left: 20px">KNUTE</a></h1>
        <nav>
            <ul>
                <li><a href="#">Расписание</a></li>
                <li><a href="#">Домашнее задание</a></li>
                <li><a href="#">Профиль</a></li>
                <li><a href="#">Полезные ссылки</a></li>
            </ul>
        </nav>
    </div>
</header>
<section class="ftco-section">
    <div class="container">
        <div class="row justify-content-center">
            <div class="col-md-6 text-center mb-5">
                <h2 class="heading-section">Расписание на первую неделю</h2>
            </div>
        </div>
        <div class="row">
            <div class="col-md-12">
                    <table class="table table-bordered table-dark table-hover">
                        <thead>
                        <tr style="text-align: center; width: 20px">
                            <th>#</th>
                            <th>Время</th>
                            <th>Понедельник</th>
                            <th>Вторник</th>
                            <th>Среда</th>
                            <th>Четверг</th>
                            <th>Пятница</th>
                        </tr>
                        </thead>
                        <tbody>
                        <tr>
                            <th scope="row">1</th>
                            <td>8:20 - 9:40</td>
                            <td>Otto</td>
                            <td>markotto@email.com</td>
                            <td>Thornton</td>
                            <td>jacobthornton@email.com</td>
                            <td>Thornton</td>
                        </tr>
                        <tr>
                            <th scope="row">2</th>
                            <td>10:05 - 11:25</td>
                            <td>Thornton</td>
                            <td>jacobthornton@email.com</td>
                            <td>Thornton</td>
                            <td>jacobthornton@email.com</td>
                            <td>Thornton</td>
                        </tr>
                        <tr>
                            <th scope="row">3</th>
                            <td>12:05 - 13:25</td>
                            <td>the Bird</td>
                            <td>larrybird@email.com</td>
                            <td>Thornton</td>
                            <td>jacobthornton@email.com</td>
                            <td>Thornton</td>
                        </tr>
                        <tr>
                            <th scope="row">4</th>
                            <td>13:50 - 15:10</td>
                            <td>Doe</td>
                            <td>johndoe@email.com</td>
                            <td>Thornton</td>
                            <td>jacobthornton@email.com</td>
                            <td>Thornton</td>
                        </tr>
                        <tr>
                            <th scope="row">5</th>
                            <td>15:25 - 16:45</td>
                            <td>Bird</td>
                            <td>garybird@email.com</td>
                            <td>Thornton</td>
                            <td>jacobthornton@email.com</td>
                            <td>Thornton</td>
                        </tr>
                        <tr>
                            <th scope="row">6</th>
                            <td>17:00 - 18:20</td>
                            <td>Otto</td>
                            <td>markotto@email.com</td>
                            <td>Thornton</td>
                            <td>jacobthornton@email.com</td>
                            <td>Thornton</td>
                        </tr>
                        <tr>
                            <th scope="row">7</th>
                            <td>18:45 - 20:05</td>
                            <td>Otto</td>
                            <td>markotto@email.com</td>
                            <td>Thornton</td>
                            <td>jacobthornton@email.com</td>
                            <td>Thornton</td>
                        </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        <div class="row justify-content-center">
            <div class="col-md-6 text-center mb-5">
                <h2 class="heading-section" style="padding-top: 65px">Расписание на вторую неделю</h2>
            </div>
        </div>
        <div class="row">
            <div class="col-md-12">
                <table class="table table-bordered table-dark table-hover">
                    <thead>
                    <tr style="text-align: center; width: 20px">
                        <th>#</th>
                        <th>Время</th>
                        <th>Понедельник</th>
                        <th>Вторник</th>
                        <th>Среда</th>
                        <th>Четверг</th>
                        <th>Пятница</th>
                    </tr>
                    </thead>
                    <tbody>
                    <tr>
                        <th scope="row">1</th>
                        <td>8:20 - 9:40</td>
                        <td>Otto</td>
                        <td>markotto@email.com</td>
                        <td>Thornton</td>
                        <td>jacobthornton@email.com</td>
                        <td>Thornton</td>
                    </tr>
                    <tr>
                        <th scope="row">2</th>
                        <td>10:05 - 11:25</td>
                        <td>Thornton</td>
                        <td>jacobthornton@email.com</td>
                        <td>Thornton</td>
                        <td>jacobthornton@email.com</td>
                        <td>Thornton</td>
                    </tr>
                    <tr>
                        <th scope="row">3</th>
                        <td>12:05 - 13:25</td>
                        <td>the Bird</td>
                        <td>larrybird@email.com</td>
                        <td>Thornton</td>
                        <td>jacobthornton@email.com</td>
                        <td>Thornton</td>
                    </tr>
                    <tr>
                        <th scope="row">4</th>
                        <td>13:50 - 15:10</td>
                        <td>Doe</td>
                        <td>johndoe@email.com</td>
                        <td>Thornton</td>
                        <td>jacobthornton@email.com</td>
                        <td>Thornton</td>
                    </tr>
                    <tr>
                        <th scope="row">5</th>
                        <td>15:25 - 16:45</td>
                        <td>Bird</td>
                        <td>garybird@email.com</td>
                        <td>Thornton</td>
                        <td>jacobthornton@email.com</td>
                        <td>Thornton</td>
                    </tr>
                    <tr>
                        <th scope="row">6</th>
                        <td>17:00 - 18:20</td>
                        <td>Otto</td>
                        <td>markotto@email.com</td>
                        <td>Thornton</td>
                        <td>jacobthornton@email.com</td>
                        <td>Thornton</td>
                    </tr>
                    <tr>
                        <th scope="row">7</th>
                        <td>18:45 - 20:05</td>
                        <td>Otto</td>
                        <td>markotto@email.com</td>
                        <td>Thornton</td>
                        <td>jacobthornton@email.com</td>
                        <td>Thornton</td>
                    </tr>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</section>
</body>
</html>

I found a lot of information on similar topics, but I can't find information about working with multiple tables.

Answer 1

To quickly answer your questions,

1. Do I need to create @Entity class and Repository for every table?
Yes you need to create entity and repository for each table in the db.

2. How to show information for students using data from registration?
You will need to fetch the info from the table storing the student details, build a DTO (Data Transfer Object) with the schedule details and all and send it to thymeleaf.

I think you will have to redesign your database itself. The design feels kinda odd.

A better design would be something like this:

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