Spring Data JPA provides multiple ways of selecting or fetching data from database server and one of the ways is using @NamedQuery or @NamedQueries. @NamedQuery and @NamedQueries can be created using XML configuration, external properties file or using Java based annotation config. Spring Data JPA supports both JPQL and SQL native named queries. Here I am going to show you examples on @NamedQuery and @NamedQueries. I am also going to use named parameter and positional parameter in the named queries. In XML configuration you need to use <named-query/> and for…
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Spring Data JPA IN Clause Example with WHERE Condition
Introduction In this example we will see how to work with IN clause with WHERE condition in SQL statement in Spring Data JPA. We will use MySQL server for this example. We will fetch selected rows or multiple rows selection as well as we will delete selected rows or multiple rows deletion from the table using IN operator with WHERE clause. We will use Spring transaction because we want to rollback our changes from database if any issue occurs during row deletion. The IN operator allows us to specify multiple…
ContinueHow to map Custom Query Results into DTO in Spring Data JPA
In this tutorial I will show you how to map custom query results into DTO in Spring Data JPA. Situations may occur while you are unable to return the entity object(s) as results from your Spring Data JPA Repository and instead you need to write custom query or native query for your business requirements. So in such situations you need to convert result into DTO (data Trasfer Object). I will use @Query annotation to create custom queries in Spring Data JPA. It is also advisable to use DTO instead of…
ContinueSpring Boot MVC and Hibernate CRUD Example
Introduction In this tutorial we will create an example on Spring Boot MVC and Hibernate CRUD. CRUD is an acronym that means Create, Read, Update and Delete operations. In my other tutorial I had also created Spring Boot MVC and JDBC CRUD Example. We will build the tutorial example using both maven and gradle build tools. We will create the annotation based hibernate configuration with Spring Boot framework. We are going to use MySQL database as a persistence storage for our application.
ContinueSpring Boot MVC and JDBC CRUD Example
Introduction In my other tutorial I had shown how to create an example on Spring MVC and JDBC CRUD example using annotations only, but here I am going to use Spring Boot framework. I did not update the other tutorial keeping in mind if someone still needs the example using Spring framework only. Here also I am going to show you the same example but using Spring Boot framework. We are going to use both gradle and maven build tools to build the application. We are going to see how…
ContinueHow to create Datasource in Spring Boot application
In this tutorial we will see how to create Datasource in Spring Boot application in different ways. We need to create datasource in our applicationin order to interact with database and perform database operations in Spring or Spring Boot applications. You can use database vendor as per your project’s requirement but the underlying concept is same for creating the Datasource. If you are using Spring JDBC API then you can use this Datasource object to create JdbcTemplate object. This Datasource object is also useful for working with Spring Data JPA…
ContinueConfigure JNDI DataSource with Spring Boot
Introduction In this post I will show you how to configure JNDI datasource with Spring Boot applications. JNDI (Java Naming Directory Interface) data source is very similar to JDBC (Java Database Connectivity) data source. I will show examples on Oracle as well as MySQL database servers. The MySQL version example is downloadable at the end of this tutorial. I will also show you how to work with Spring Boot 1.5.9 and Spring Boot 2.2.1 to 2.4.2 versions. The TomcatEmbeddedServletContainerFactory has been removed from Spring Boot 2 and I will show…
ContinueSpring Data JPA Entity Graphs
One of the important features in Spring Data JPA or simply JPA is the ability to specify fetch plans using Entity Graphs. This is useful since it allows you to customize the data, which is retrieved with a query or find operation. It is expected to display data from the same entity in different and several ways when working with mid to large size applications. In other cases, you just need to select a smallest set of information to optimize the performance of your application. Typically you do not have…
ContinueSpring Security – JDBC Authentication
In my previous tutorials, I have shown in-memory authentications Spring Security Form based Authentication – XML Configuration , Spring Security Form based Authentication – Annotations but in this tutorial I will show you how to authenticate user using Spring JDBC and Spring MVC web application to secure pages. I will create spring mvc based web application and I will configure Spring Security to protect a page from outside access. Spring Security allows to you to integrate security features with JEE web application easily, it takes care about all incoming HTTP requests…
ContinueSpring @PostConstruct and @PreDestroy Example
In this tutorial I will show you how we can use @PostConstruct and @PreDestroy annotation in Spring framework. @PostConstruct and @PreDestroy annotations are generally considered best practices for receiving life cycle callbacks in a modern Spring application. Using these annotations means that our beans are not coupled to Spring specific interfaces. Sometimes we need to load some data or perform initialization work after all necessary properties on the bean have been set by the container. In this example we will load data from database during application startup and set that…
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