Search results for: JPA

by 0 comments on "Many-to-Many Relationship in Spring Boot Rest + JPA"

In this article, we will learn about the Many-to-Many relationship in JPA and its implementation in a Spring Boot Application. Let’s make a start! @ManytoMany annotation A many-to-many relationship occurs when multiple records in a table are associated with multiple records in another table. @ManytoMany annotation defines a many-valued association with many-to-many multiplicity. As per the official documentation: Every many-to-many association…

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by 0 comments on "One to Many Mapping Hibernate/JPA Using Spring Boot and MySQL"

This tutorial will demonstrate how to implement the One-to-Many Mapping in your Spring Boot application that uses Hibernate/Spring Data JPA. As a database, I will use a MySQL server. If you are learning about Hibernate, you might also be interested in the following tutorials: One-to-One Mapping Hibernate/JPA Using Spring Boot and MySQL Many-to-Many Relationship in…

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by 0 comments on "One to One Mapping Hibernate/JPA Using Spring Boot and MySQL"

This tutorial will demonstrate how One-to-One Mapping in Hibernate/Spring Boot Data JPA works. As a database, I will use a MySQL database server. We will create two JPA entities: the Book and the Story. The Book and the Story entities have one to one relationship, which means that the Book entity has a Story entity,…

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by 0 comments on "Calling a Stored Procedure in Spring Boot REST with JPA"

In this tutorial, you will learn how to call stored procedures in a Spring Boot RESTful API project that uses Spring Data JPA. Using a stored procedure to execute parts of the application logic in the database is a widely used approach in huge, data-heavy applications. A stored procedure is a group of predefined SQL…

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by 0 comments on "Specification & Predicate: Advance Search and Filtering in JPA"

In this tutorial, you will learn how to use specification and predicate in Spring Data JPA using the Spring Boot RESTful API project. Spring Data JPA Specifications allow us to create dynamic database queries by using the JPA Criteria API. It defines a specification as a predicate over an entity. Spring has a wrapper around…

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by 0 comments on "Rollback Using @Transactional in Spring with JPA"

This short tutorial will teach you how to roll back a database change using @Transactional annotation in your RESTful Web Service built with Spring Boot and JPA. Rollback with @Transactional Annotation Sometimes if an error occurs in our RESTful Web Service, we want to roll back the changes made. For changes to be rolled back…

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by 0 comments on "Select Specific Columns with JPA Native Query"

This tutorial will teach you how to create a JPA Native SQL Query to only select information from specific columns. You can find many more Spring Data JPA-related tutorials on this site. Some of the most popular tutorials are: One-to-One Mapping Hibernate/JPA Using Spring Boot and MySQL One-to-Many Mapping Hibernate/JPA Using Spring Boot and MySQL…

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by 0 comments on "How to Use LIKE % Expression in JPA SQL Query"

This short Spring Data JPA tutorial will teach you how to use the LIKE % expression in a Native SQL Query. When using advanced SQL LIKE expression, the % sign in the SQL query would represent zero, one or multiple characters. Let’s have a look at the Native JPA SQL Query that uses advanced SQL…

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by 0 comments on "Spring Data JPA Native UPDATE SQL Query"

This short Spring Data JPA tutorial will teach you how to write a Native UPDATE SQL query. Let’s assume you need to run the following SQL query: update users u set u.EMAIL_VERIFICATION_STATUS = ‘true’ where u.USER_ID = ‘5JwQBHd1mL73XEg8S2e2w4ITn9gOW4’ I assume you will not want to hardcode the values of EMAIL_VERIFICATION_STATUS and USER_ID into an SQL…

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by 0 comments on "Spring Data JPA Native SQL Query"

This tutorial will teach you how to use the @Query annotation to run custom SQL queries. Spring Data JPA provides us with many ready-to-use query methods which allow us to perform basic CRUD(Create, Read, Update and Delete) operations. However, sometimes, even though we have this ready-to-use Query method, we still need to run a custom…

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by 0 comments on "Spring Boot REST and JPA – Save to a Database"

In this blog post, I will share how to create a very simple RESTful Spring Boot Web Service that uses Spring Data JPA to save information to a database. Our Web Service will accept HTTP Post requests with user details and then save these user details into MySQL Database using Spring Data JPA CrudRepository. For code…

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by 0 comments on "Configure Spring Data JPA in Jersey 2 JAX-RS App"

In this blog post, I am going to share with you how to configure Spring Data JPA in a Jersey 2 Container Deployable Web App. Spring Data JPA makes it much easier and more convenient to persist and read data from the database and when I needed to tie together Spring Data JPA and Jersey 2 Web…

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by 0 comments on "Configuring JPA in Jersey 2 Web App"

With this blog post, I am going to share what I needed to do to make JPA work in my Jersey 2 Web Services App. I have created my Jersey 2 app using the following maven snippet: mvn archetype:generate -DarchetypeGroupId=org.glassfish.jersey.archetypes \ -DarchetypeArtifactId=jersey-quickstart-webapp -DarchetypeVersion=2.26 I then opened pom.xml and added a few new dependencies which I…

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by 3 comments on "RESTful Web Services with Jersey and Spring Data JPA – Cheat Sheet"

Create a Servlet Container deployable Jersey web application Create new Jersey web application using Maven. The project created with the below jersey-quickstart-webapp archetype can be built and deployed to a servlet container like for example Apache Tomcat. mvn archetype:generate -DarchetypeGroupId=org.glassfish.jersey.archetypes \ -DarchetypeArtifactId=jersey-quickstart-webapp -DarchetypeVersion=2.26 POM.XML Dependency to Support JSON To support JSON in your Jersey Web App add…

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