{"id":10536,"date":"2024-03-14T12:18:47","date_gmt":"2024-03-14T12:18:47","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-access-database-data-in-spring-boot\/"},"modified":"2025-08-04T00:50:54","modified_gmt":"2025-08-04T00:50:54","slug":"how-to-access-database-data-in-spring-boot","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-access-database-data-in-spring-boot\/","title":{"rendered":"Spring Boot Database Access Tutorial"},"content":{"rendered":"<p>In Spring Boot, accessing database data is typically done using Spring Data JPA. Below is a simple example:<\/p>\n<p>Firstly, import the Spring Data JPA dependency in the pom.xml file.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-xml\">&lt;dependency&gt;\r\n    &lt;groupId&gt;org.springframework.boot&lt;\/groupId&gt;\r\n    &lt;artifactId&gt;spring-boot-starter-data-jpa&lt;\/artifactId&gt;\r\n&lt;\/dependency&gt;\r\n<\/code><\/pre>\n<p>Configure the database connection information in the application.properties file.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-properties\">spring.datasource.url=jdbc:mysql:\/\/localhost:3306\/mydatabase\r\nspring.datasource.username=root\r\nspring.datasource.password=123456\r\nspring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver\r\n<\/code><\/pre>\n<p>Create a class, for example User.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-java\">@Entity\r\n@Table(name = \"users\")\r\npublic class User {\r\n    @Id\r\n    @GeneratedValue(strategy = GenerationType.IDENTITY)\r\n    private Long id;\r\n\r\n    private String username;\r\n    private String email;\r\n\r\n    \/\/ getters and setters\r\n}\r\n<\/code><\/pre>\n<p>Create a Repository interface that extends JpaRepository.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-java\">@Repository\r\npublic interface UserRepository extends JpaRepository&lt;User, Long&gt; {\r\n    \/\/ \u53ef\u4ee5\u5728\u8fd9\u91cc\u5b9a\u4e49\u4e00\u4e9b\u81ea\u5b9a\u4e49\u7684\u67e5\u8be2\u65b9\u6cd5\r\n}\r\n<\/code><\/pre>\n<p>Inject the UserRepository in the Service class and call the relevant methods.<\/p>\n<pre class=\"post-pre\"><code class=\"lang-java\">@Service\r\npublic class UserService {\r\n    @Autowired\r\n    private UserRepository userRepository;\r\n\r\n    public List&lt;User&gt; getAllUsers() {\r\n        return userRepository.findAll();\r\n    }\r\n\r\n    public User getUserById(Long id) {\r\n        return userRepository.findById(id).orElse(null);\r\n    }\r\n\r\n    public User saveUser(User user) {\r\n        return userRepository.save(user);\r\n    }\r\n\r\n    public void deleteUser(Long id) {\r\n        userRepository.deleteById(id);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>With this, you can access database data through UserService. And of course, by calling UserService in the Controller, you can operate on the database data.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Spring Boot, accessing database data is typically done using Spring Data JPA. Below is a simple example: Firstly, import the Spring Data JPA dependency in the pom.xml file. &lt;dependency&gt; &lt;groupId&gt;org.springframework.boot&lt;\/groupId&gt; &lt;artifactId&gt;spring-boot-starter-data-jpa&lt;\/artifactId&gt; &lt;\/dependency&gt; Configure the database connection information in the application.properties file. spring.datasource.url=jdbc:mysql:\/\/localhost:3306\/mydatabase spring.datasource.username=root spring.datasource.password=123456 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver Create a class, for example User. @Entity @Table(name = [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[284,10367,2522,13199,1403],"class_list":["post-10536","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-database","tag-jpa","tag-spring-boot","tag-spring-data","tag-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Spring Boot Database Access Tutorial - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn to access database data in Spring Boot using Spring Data JPA. 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