Hello! Today, we will learn in detail about how to develop the backend of a blog using Spring Boot<\/strong>. In this course, we will cover examples for the basic screen configuration of the blog and learn how to utilize Spring Boot and Thymeleaf<\/strong> through hands-on practice.<\/p>\n Thymeleaf is a template engine for creating views in web applications using Java. It is based on HTML and performs a role similar to JSP but offers more features and flexibility. Some of the advantages of Thymeleaf include:<\/p>\n First, let’s learn how to set up a Spring Boot project. You can create a new project using IntelliJ IDEA or Spring Initializr.<\/p>\n When you create the project, a basic file structure will be generated. Understanding this structure is important.<\/p>\n In this blog application, we will primarily set up a Post model. We define the Post model using the following steps.<\/p>\n You can simply store data using the H2 database. Configure the database settings in the To easily interact with the database using JPA, we create a Repository interface.<\/p>\n The service class is where the business logic is processed. It includes CRUD functionalities for posts.<\/p>\n The Spring MVC controller handles web requests. It includes methods to return a list of posts and to add a new post.<\/p>\n Finally, we will create Thymeleaf template files to build the blog’s interface. We will draft the basic HTML file and explore how to output data.<\/p>\n In this course, we explored backend development using Spring Boot and the creation of a simple blog interface with Thymeleaf. Through this example, we gained an understanding of the basic workings of Spring Boot and learned how to create dynamic web pages using Thymeleaf.<\/p>\n Furthermore, based on this example, feel free to add various features or apply different design patterns. You will learn a lot during the process of developing a real application using Spring Boot and Thymeleaf.<\/p>\n Thank you!<\/p>\n <\/body><\/p>\n","protected":false},"excerpt":{"rendered":"Course Objectives<\/h2>\n
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Prerequisites: Thymeleaf<\/h2>\n
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Setting Up a Spring Boot Project<\/h2>\n
1. Access Spring Initializr: https:\/\/start.spring.io\/\n2. Choose Project: Gradle Project\n3. Choose Language: Java\n4. Select Spring Boot: Version 2.5.4 or higher\n5. Enter Project Metadata:\n - Group: com.example\n - Artifact: blog\n6. Add Dependencies:\n - Spring Web\n - Spring Data JPA\n - H2 Database\n - Thymeleaf\n7. Click Generate to download the project<\/code><\/pre>\nProject Structure<\/h3>\n
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src\/main\/java<\/code>: This folder contains the Java source code.<\/li>\nsrc\/main\/resources<\/code>: This folder contains static resources and template files, including the application.properties file.<\/li>\nsrc\/test\/java<\/code>: This folder contains the test code.<\/li>\n<\/ul>\nSetting Up the Blog Model<\/h2>\n
package com.example.blog.model;\n\nimport javax.persistence.*;\n\n@Entity\npublic class Post {\n @Id\n @GeneratedValue(strategy = GenerationType.IDENTITY)\n private Long id;\n\n private String title;\n private String content;\n\n \/\/ Constructor, Getters, Setters\n public Post() {}\n\n public Post(String title, String content) {\n this.title = title;\n this.content = content;\n }\n\n public Long getId() {\n return id;\n }\n\n public void setId(Long id) {\n this.id = id;\n }\n\n public String getTitle() {\n return title;\n }\n\n public void setTitle(String title) {\n this.title = title;\n }\n\n public String getContent() {\n return content;\n }\n\n public void setContent(String content) {\n this.content = content;\n }\n}<\/code><\/pre>\nDatabase Configuration<\/h2>\n
application.properties<\/code> file as follows.<\/p>\nspring.h2.console.enabled=true\nspring.datasource.url=jdbc:h2:mem:testdb\nspring.datasource.driverClassName=org.h2.Driver\nspring.datasource.username=sa\nspring.datasource.password=password\nspring.jpa.database-platform=org.hibernate.dialect.H2Dialect<\/code><\/pre>\nCreating the Repository Interface<\/h2>\n
package com.example.blog.repository;\n\nimport com.example.blog.model.Post;\nimport org.springframework.data.jpa.repository.JpaRepository;\n\npublic interface PostRepository extends JpaRepositoryCreating the Service Class<\/h2>\n
package com.example.blog.service;\n\nimport com.example.blog.model.Post;\nimport com.example.blog.repository.PostRepository;\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.stereotype.Service;\n\nimport java.util.List;\n\n@Service\npublic class PostService {\n @Autowired\n private PostRepository postRepository;\n\n public ListCreating the Controller Class<\/h2>\n
package com.example.blog.controller;\n\nimport com.example.blog.model.Post;\nimport com.example.blog.service.PostService;\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.stereotype.Controller;\nimport org.springframework.ui.Model;\nimport org.springframework.web.bind.annotation.GetMapping;\nimport org.springframework.web.bind.annotation.ModelAttribute;\nimport org.springframework.web.bind.annotation.PostMapping;\n\n@Controller\npublic class PostController {\n @Autowired\n private PostService postService;\n\n @GetMapping(\"\/\")\n public String listPosts(Model model) {\n model.addAttribute(\"posts\", postService.findAll());\n return \"post\/list\";\n }\n\n @GetMapping(\"\/post\/new\")\n public String createPostForm(Model model) {\n model.addAttribute(\"post\", new Post());\n return \"post\/create\";\n }\n\n @PostMapping(\"\/post\")\n public String savePost(@ModelAttribute Post post) {\n postService.save(post);\n return \"redirect:\/\";\n }\n}<\/code><\/pre>\nCreating Thymeleaf Templates<\/h2>\n
Post List Screen<\/h3>\n
<!DOCTYPE html>\n<html xmlns:th=\"http:\/\/www.thymeleaf.org\">\n<head>\n <title>Blog Post List<\/title>\n<\/head>\n<body>\n <h1>Blog Posts<\/h1>\n <a href=\"@{\/post\/new}\">Add New Post<\/a>\n <ul>\n <li th:each=\"post : ${posts}\">\n <a th:href=\"@{\/post\/{id}(id=${post.id})}\">\n <span th:text=\"${post.title}\"><\/span><\/a>\n <\/li>\n <\/ul>\n<\/body>\n<\/html><\/code><\/pre>\nPost Creation Screen<\/h3>\n
<!DOCTYPE html>\n<html xmlns:th=\"http:\/\/www.thymeleaf.org\">\n<head>\n <title>Create New Post<\/title>\n<\/head>\n<body>\n <h1>Create New Post<\/h1>\n <form action=\"#\" th:action=\"@{\/post}\" th:object=\"${post}\" method=\"post\">\n <label for=\"title\">Title:<\/label>\n <input type=\"text\" id=\"title\" th:field=\"*{title}\" required\/>\n <br\/>\n <label for=\"content\">Content:<\/label>\n <textarea id=\"content\" th:field=\"*{content}\" required><\/textarea>\n <br\/>\n <button type=\"submit\">Submit<\/button>\n <\/form>\n <a href=\"@{\/}\">Go Back to List<\/a>\n<\/body>\n<\/html><\/code><\/pre>\nConclusion<\/h2>\n