build.gradle

@@ -35,9 +35,16 @@ dependencies {
     implementation group: 'org.springframework.boot', name: 'spring-boot-starter-web'
     implementation group: 'org.springframework.boot', name: 'spring-boot-starter-jetty'
     implementation group: 'org.springframework.boot', name: 'spring-boot-starter-thymeleaf'
+    implementation group: 'org.springframework.boot', name: 'spring-boot-starter-validation'
+    implementation group: 'org.springframework.boot', name:'spring-boot-starter-data-jpa'
+    //implementation group: 'org.springframework.boot', name: 'spring-boot-starter-security'
     implementation group: 'org.slf4j', name: 'slf4j-api', version: versionSLF4J
     implementation group: 'nz.net.ultraq.thymeleaf', name: 'thymeleaf-layout-dialect'
-    implementation group: 'org.javassist', name: 'javassist', version: '3.25.0-GA'
+    //implementation group: 'org.thymeleaf.extras', name: 'thymeleaf-extras-springsecurity5'
+    implementation group: 'com.h2database', name:'h2'
+    implementation group: 'javax.xml.bind', name:'jaxb-api'
+    implementation group: 'org.javassist', name:'javassist'
+
     implementation  group: 'org.eclipse.jetty', name: 'jetty-servlet', version: versionJetty
 
     implementation group: 'org.webjars', name: 'jquery', version: '3.6.0'

src/main/java/ru/ulstu/configuration/MvcConfiguration.java

@@ -20,7 +20,9 @@ import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
 public class MvcConfiguration implements WebMvcConfigurer {
     @Override
     public void addViewControllers(ViewControllerRegistry registry) {
-        registry.addViewController("/{articlename:\\w+}");
+        registry.addViewController("/index");
+        registry.addViewController("/admin");
+        registry.addViewController("/editNews");
     }
 
     @Override

src/main/java/ru/ulstu/controller/IndexController.java

@@ -9,20 +9,20 @@ package ru.ulstu.controller;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
-import ru.ulstu.model.News;
-
-import java.util.GregorianCalendar;
-import java.util.List;
+import ru.ulstu.service.NewsService;
 
 @Controller
 public class IndexController {
 
+    private final NewsService newsService;
+
+    public IndexController(NewsService newsService) {
+        this.newsService = newsService;
+    }
+
     @GetMapping("/")
     public String index(Model model) {
-        model.addAttribute("news", List.of(new News("Открытие семинара", new GregorianCalendar(2022, 4, 1).getTime(),
-                        "На кафере \"Информационные системы\" Ульяновского государственного технического университета состоится открытие постоянно действующего семинара \"Анализ данных и процессов\". Семинар планируется проводить ежемесячно."),
-                new News("Открытие семинара", new GregorianCalendar(2022, 4, 1).getTime(),
-                        "На кафере \"Информационные системы\" Ульяновского государственного технического университета состоится открытие постоянно действующего семинара \"Анализ данных и процессов\". Семинар планируется проводить ежемесячно.")));
+        model.addAttribute("news", newsService.getAll());
         return "index";
     }
 }

src/main/java/ru/ulstu/controller/NewsController.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2021 Anton Romanov - All Rights Reserved
+ * You may use, distribute and modify this code, please write to: romanov73@gmail.com.
+ *
+ */
+
+package ru.ulstu.controller;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import ru.ulstu.model.News;
+import ru.ulstu.service.NewsService;
+
+import javax.validation.Valid;
+
+@Controller
+public class NewsController {
+    private final NewsService newsService;
+
+    public NewsController(NewsService newsService) {
+        this.newsService = newsService;
+    }
+
+    @GetMapping("/editNews/{newsId}")
+    public String editNews(@PathVariable(value = "newsId") Integer id, Model model) {
+        model.addAttribute("news", (id != null && id != 0) ? newsService.getById(id) : new News());
+        return "editNews";
+    }
+
+    @GetMapping("/news/{newsId}")
+    public String viewNews(@PathVariable(value = "newsId") Integer id, Model model) {
+        model.addAttribute("news", id != null ? newsService.getById(id) : new News());
+        return "news";
+    }
+
+    @PostMapping("saveNews")
+    public String saveNews(@Valid @ModelAttribute News news, BindingResult result) {
+        if (result.hasErrors()) {
+            return "editNews";
+        }
+        newsService.save(news);
+
+        return "redirect:/";
+    }
+
+    @GetMapping("deleteNews/{newsId}")
+    public String delete(@PathVariable(value = "newsId") Integer id) {
+        newsService.delete(id);
+        return "redirect:/";
+    }
+}

src/main/java/ru/ulstu/model/BaseEntity.java

@@ -0,0 +1,83 @@
+package ru.ulstu.model;
+
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.MappedSuperclass;
+import javax.persistence.Version;
+import javax.validation.constraints.NotNull;
+import java.io.Serializable;
+
+@MappedSuperclass
+public abstract class BaseEntity implements Serializable, Comparable<BaseEntity> {
+    @Id
+    @GeneratedValue(strategy = GenerationType.TABLE)
+    private Integer id;
+
+    @Version
+    private Integer version;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getVersion() {
+        return version;
+    }
+
+    public void setVersion(Integer version) {
+        this.version = version;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!getClass().isAssignableFrom(obj.getClass())) {
+            return false;
+        }
+        BaseEntity other = (BaseEntity) obj;
+        if (id == null) {
+            if (other.id != null) {
+                return false;
+            }
+        } else if (!id.equals(other.id)) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + (id == null ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName() + "{" +
+                "id=" + id +
+                ", version=" + version +
+                '}';
+    }
+
+    @Override
+    public int compareTo(@NotNull BaseEntity o) {
+        return id != null ? id.compareTo(o.getId()) : -1;
+    }
+
+    public void reset() {
+        this.id = null;
+        this.version = null;
+    }
+}

src/main/java/ru/ulstu/model/News.java

@@ -1,12 +1,28 @@
 package ru.ulstu.model;
 
+import org.springframework.format.annotation.DateTimeFormat;
+
+import javax.persistence.Entity;
+import javax.persistence.Lob;
+import javax.validation.constraints.NotEmpty;
 import java.util.Date;
 
-public class News {
-    private final static int MAX_NEWS_TEXT_PREVIEW_LENGTH = 200;
-    private final String title;
-    private final Date date;
-    private final String text;
+@Entity
+public class News extends BaseEntity {
+    private final static int MAX_NEWS_TEXT_PREVIEW_LENGTH = 800;
+
+    @NotEmpty(message = "Заголовок не может быть пустым")
+    private String title;
+
+    @DateTimeFormat(pattern = "yyyy-MM-dd'T'HH:mm")
+    private Date date;
+
+    @Lob
+    @NotEmpty(message = "Текст новости не может быть пустым")
+    private String text;
+
+    public News() {
+    }
 
     public News(String title, Date date, String text) {
         this.title = title;
@@ -22,12 +38,24 @@ public class News {
         return date;
     }
 
+    public void setDate(Date date) {
+        this.date = date;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public void setText(String text) {
+        this.text = text;
+    }
+
     public String getText() {
         return text;
     }
 
     public String getPreview() {
-        return text.length() > MAX_NEWS_TEXT_PREVIEW_LENGTH
+        return text != null && text.length() > MAX_NEWS_TEXT_PREVIEW_LENGTH
                 ? text.substring(0, MAX_NEWS_TEXT_PREVIEW_LENGTH) + "..."
                 : text;
     }

src/main/java/ru/ulstu/repository/NewsRepository.java

@@ -0,0 +1,7 @@
+package ru.ulstu.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.ulstu.model.News;
+
+public interface NewsRepository extends JpaRepository<News, Integer> {
+}

src/main/java/ru/ulstu/service/NewsService.java

@@ -0,0 +1,49 @@
+package ru.ulstu.service;
+
+import org.springframework.stereotype.Service;
+import ru.ulstu.model.News;
+import ru.ulstu.repository.NewsRepository;
+
+import javax.validation.constraints.NotNull;
+import java.util.Date;
+import java.util.List;
+
+@Service
+public class NewsService {
+    private final NewsRepository newsRepository;
+
+    public NewsService(NewsRepository newsRepository) {
+        this.newsRepository = newsRepository;
+    }
+
+    public void create(String title, String text) {
+        newsRepository.save(new News(title, new Date(), text));
+    }
+
+    public void create(News news) {
+        news.setDate(new Date());
+        newsRepository.save(news);
+    }
+
+    public void save(News news) {
+        if (news.getId() != null && (news.getId() != 0)) {
+            newsRepository.save(news);
+        } else {
+            create(news);
+        }
+    }
+
+    public News getById(@NotNull Integer id) {
+        return newsRepository
+                .findById(id)
+                .orElseThrow(() -> new RuntimeException("Новость не найдена"));
+    }
+
+    public List<News> getAll() {
+        return newsRepository.findAll();
+    }
+
+    public void delete(Integer id) {
+        newsRepository.deleteById(id);
+    }
+}

src/main/resources/application.properties

@@ -8,3 +8,11 @@ spring.main.banner-mode=off
 logging.level.tech.athene=DEBUG
 server.port=8080
 spring.jackson.serialization.WRITE_DATES_AS_TIMESTAMPS=false
+# go to  http://localhost:8080/h2-console
+spring.datasource.url=jdbc:h2:file:./data/db
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=password
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.h2.console.enabled=true
+spring.jpa.hibernate.ddl-auto=update

src/main/resources/public/css/main.css

@@ -9,18 +9,26 @@
 }
 
 .news-item {
-    margin: 20px;
-    position: relative;
     text-align: justify;
 }
 
 .news-date {
     font-size: 10px;
-    position: absolute;
-    bottom: 0;
-    right: 25px;
+    text-align: right;
 }
 
 .news-image {
     width: 300px;
 }
+
+.error {
+    color: red;
+}
+
+.fa {
+    color: black;
+}
+
+.link-dark, .link-dark:visited, .link-dark:focus {
+    color: black;
+}

src/main/resources/templates/admin.html

@@ -0,0 +1,16 @@
+<!--
+  ~ Copyright (C) 2021 Anton Romanov - All Rights Reserved
+  ~ You may use, distribute and modify this code, please write to: romanov73@gmail.com.
+  ~
+  -->
+
+<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-spring4-4.dtd">
+<html
+        xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
+        layout:decorate="~{default}">
+<div class="container" layout:fragment="content">
+    <a href="/editNews/0" class="btn btn-outline-dark">
+        <i class="fa fa-plus-square" aria-hidden="true"> Добавить новость</i>
+    </a>
+</div>
+</html>

src/main/resources/templates/default.html

@@ -17,12 +17,12 @@
     <link rel="stylesheet" href="/webjars/bootstrap/4.6.0/css/bootstrap.min.css"/>
     <link rel="stylesheet" href="/webjars/bootstrap-select/1.13.8/css/bootstrap-select.min.css"/>
     <link rel="stylesheet" href="/webjars/font-awesome/4.7.0/css/font-awesome.min.css"/>
-    <link rel="stylesheet" href="css/main.css"/>
+    <link rel="stylesheet" href="/css/main.css"/>
 </head>
 <body>
 <nav class="navbar navbar-expand-md navbar-light bg-white">
     <a class="navbar-brand" href="/">
-        <img src="img/logo.svg" width="50px">
+        <img src="/img/logo.svg" width="50px">
         <div class="navbar-text" th:text="#{messages.logo-title}" style="font-size: 16px"></div>
     </a>
     <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent"
@@ -32,13 +32,16 @@
     <div class="collapse navbar-collapse" id="navbarSupportedContent">
         <ul class="navbar-nav mr-auto">
             <li class="nav-item">
-                <a class="nav-link" href="news">Новости</a>
+                <a class="nav-link" href="/news">Новости</a>
             </li>
             <li class="nav-item">
-                <a class="nav-link" href="news">Заседания</a>
+                <a class="nav-link" href="/news">Заседания</a>
             </li>
             <li class="nav-item">
-                <a class="nav-link" href="news">Отчеты</a>
+                <a class="nav-link" href="/news">Отчеты</a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="/admin">Администратору</a>
             </li>
         </ul>
     </div>

src/main/resources/templates/editNews.html

@@ -0,0 +1,34 @@
+<!--
+  ~ Copyright (C) 2021 Anton Romanov - All Rights Reserved
+  ~ You may use, distribute and modify this code, please write to: romanov73@gmail.com.
+  ~
+  -->
+
+<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-spring4-4.dtd">
+<html
+        xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout" xmlns:th="http://www.w3.org/1999/xhtml"
+        layout:decorate="~{default}">
+<div class="container" layout:fragment="content">
+    <h3>Редактирование новости:</h3>
+    <form action="#" th:action="@{/saveNews}" th:object="${news}" method="post">
+        <input type="hidden" th:field="*{id}">
+        <input type="hidden" th:field="*{date}">
+        <input type="hidden" th:field="*{version}">
+        <div class="form-group">
+            <label for="title">Заголовок</label>
+            <input type="text" class="form-control" id="title" th:field="*{title}" placeholder="Заголовок новости">
+            <p th:if="${#fields.hasErrors('title')}" th:class="${#fields.hasErrors('title')}? error">
+                Не может быть пустым</p>
+        </div>
+        <div class="form-group">
+            <label for="text">Текст новости</label>
+            <textarea class="form-control" id="text" th:field="*{text}" placeholder="Текст новости"
+                      style="height: 300px"></textarea>
+            <p th:if="${#fields.hasErrors('text')}" th:class="${#fields.hasErrors('text')}? error">
+                Не может быть пустым</p>
+        </div>
+        <button type="submit" class="btn btn-outline-dark">Сохранить</button>
+        <a href="javascript:history.back()" class="btn btn-outline-dark">Отмена</a>
+    </form>
+</div>
+</html>

src/main/resources/templates/index.html

@@ -8,23 +8,32 @@
 <html
         xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout" xmlns:th="http://www.w3.org/1999/xhtml"
         layout:decorate="~{default}">
-<head>
-    <title>Time series smoothing</title>
-    <meta name="viewport" content="width=device-width, initial-scale=1"/>
-</head>
 <div class="container" layout:fragment="content">
     <div th:each="n : ${news}" class="news">
         <div class="row">
             <div class="col-md-4">
-                <img class="news-image" src="img/logo.svg"/>
+                <img class="news-image" src="/img/logo.svg"/>
             </div>
             <div class="col-md-8">
-                <h5 th:text="${n.title}"/>
+                <div class="row">
+                    <div class="col-md-10">
+                        <a th:href="@{'/news/' + ${n.id}}" class="link-dark"><h5 th:text="${n.title}"/></a>
+                    </div>
+                    <div class="col-md-2" style="text-align: right">
+                        <a th:href="@{'/editNews/' + ${n.id}}" class="link-dark">
+                            <i class="fa fa-pencil" aria-hidden="true"></i>
+                        </a>
+                        <a th:href="@{'/deleteNews/' + ${n.id}}" class="link-dark"
+                           onclick="return confirm('Удалить новость?')">
+                            <i class="fa fa-trash" aria-hidden="true"></i>
+                        </a>
+                    </div>
+                </div>
                 <div th:text="${n.preview}" class="news-item"></div>
+            </div>
+        </div>
         <div th:text="${'Опубликовано: ' + #calendars.format(n.date, 'dd.MM.yyyy HH:mm')}"
              class="news-date"></div>
-            </div>
-        </div>
         <hr/>
     </div>
 </div>

src/main/resources/templates/news.html

@@ -0,0 +1,25 @@
+<!--
+  ~ Copyright (C) 2021 Anton Romanov - All Rights Reserved
+  ~ You may use, distribute and modify this code, please write to: romanov73@gmail.com.
+  ~
+  -->
+
+<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-spring4-4.dtd">
+<html
+        xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout" xmlns:th="http://www.w3.org/1999/xhtml"
+        layout:decorate="~{default}">
+<div class="container" layout:fragment="content">
+    <div class="row">
+        <div class="col-md-4">
+            <img class="news-image" src="/img/logo.svg"/>
+        </div>
+        <div class="col-md-8">
+            <h5 th:text="${news.title}"/>
+            <div th:text="${news.text}" class="news-item"></div>
+        </div>
+    </div>
+    <div th:text="${'Опубликовано: ' + #calendars.format(news.date, 'dd.MM.yyyy HH:mm')}"
+         class="news-date"></div>
+    <a href="javascript:history.back()" class="btn btn-outline-dark" style="text-align: right">Назад</a>
+</div>
+</html>