Harry Nguyen

Harry Nguyen

1637865102

How to use Spring JDBC Template with Spring Boot for Postgres DataBase

https://ozenero.com/how-to-use-jdbc-template-with-spring-boot-for-postgres-database

The tutorial shows you how to use Spring JDBC Template to access  & manipulate database (Postgres DB) with Spring Boot.

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How to use Spring JDBC Template with Spring Boot for Postgres DataBase » grokonez

https://grokonez.com/spring-framework/spring-boot/how-to-use-jdbc-template-with-spring-boot-for-postgres-database

How to use Spring JDBC Template with Spring Boot for Postgres DataBase

The tutorial shows you how to use Spring JDBC Template to access  & manipulate database (Postgres DB) with Spring Boot.

I. Technology

– Java 1.8 – Maven 3.3.9 – Spring Tool Suite – Version 3.8.1.RELEASE – Spring Boot: 1.4.0.RELEASE

II. Overview of Spring JDBC Template project

1. Design

jdbc-postgresql

Class mapping with design:

  • Client: JdbctemplatePostgresApplication.java
  • Bussiness Layer: CustomerService interface, and CustomerServiceImpl implement CustomerService.
  • Dao Layer: CustomerDao interface and CustomerDaoImpl implement CustomerDao.
  • Database: Postgres.
  • Model: Customer class.

2. Step to do

- Create SpringBoot project - Config DataSource - Create postgresql-schema - Create Model: Customer - Build Dao layer: CustomerDao interface; CustomerImpl - Build Business Layer: CustomerService interface & CustomerServiceImpl - Build Client: JdbctemplatePostgresApplication

III. Practice

1. Create SpringBoot project

File->New->Spring Starter Project jdbc-postgresql-startproj

In SQL, select JDBC & PostgreSQL
jdbc-postgresql-pom-config

Press Finish.

2. Config DataSource

In application.properties file:

spring.datasource.url=jdbc:postgresql://localhost:5432/testdb
spring.datasource.username=postgres
spring.datasource.password=123

3. Create Progresql Schema

Create schema-postgresql.sql file and places in src/main/resources folder with content

More at:

https://grokonez.com/spring-framework/spring-boot/how-to-use-jdbc-template-with-spring-boot-for-postgres-database

How to use Spring JDBC Template with Spring Boot for Postgres DataBase

#spring-jdbc #springboot #postgres #database

Were  Joyce

Were Joyce

1620751200

How to Configure the Interceptor With Spring Boot Application

In the video in this article, we take a closer look at how to configure the interceptor with the Spring Boot application! Let’s take a look!

#spring boot #spring boot tutorial #interceptor #interceptors #spring boot interceptor #spring boot tutorial for beginners

Arvel  Miller

Arvel Miller

1614150105

How to use Database and Redis with Spring Boot JPA

This article explains using the Spring Boot application with multiple data sources.

I am using Spring Boot 2.3.0.RELEASE and database as Postgres, pre-requisites are Postgres database and Redis running already.

Lets get started by adding below dependencies to your pom.xml file

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>3.3.0</version>
</dependency>

#redis #spring-boot #spring-jpa #postgres #database

Were  Joyce

Were Joyce

1620720872

Spring vs Spring BooDifference Between Spring and Spring Boot

As an extension of the Spring Framework, Spring Boot is widely used to make development on Spring faster, more efficient and convenient. In this article, we will look at some of the parameters were using Spring Boot can drastically reduce the time and effort required in application development.

What is Spring?

Spring Boot

Difference between Spring and Spring Boot

Advantages of Spring Boot over Spring

Conclusion

#full stack development #spring #spring and spring boot #spring boot

Were  Joyce

Were Joyce

1621345080

Setting your own spring boot server via JDBC part 2

Before continuing on this tutorial, ensure you have reviewed/read part 1 before moving forward: Setting your own spring boot server via JDBC part 1 | by Michael Tong | Dec, 2020 | Medium

In part 2, we will talk about how to set up endpoints to perform crud operations, as well as the structure of the rest of the application.

To have some context as to how the application will be implemented, let’s take a look at the following image:

Before continuing on this tutorial, ensure you have reviewed/read part 1 before moving forward: Setting your own spring boot server via JDBC part 1 | by Michael Tong | Dec, 2020 | Medium

In part 2, we will talk about how to set up endpoints to perform crud operations, as well as the structure of the rest of the application.

To have some context as to how the application will be implemented, let’s take a look at the following image:

We have the controller, which listens to client requests via api endpoints. Depending on what the requests are looking for, we call the respective service which handles the business logic.

Often times this can mean calling another 3rd party service or sanitizing data coming from the controller.

For example, if we are building a backend server that handles/manages aws ec2 services, we would need to make a call to aws service to either create/modify/delete exist ec2 instances, and update our database to reflect the true status of the instances.

If that was a bit hard to understand, let’s use a shopping cart application as an example. We can have a controller that takes in endpoints to purchase items. From there, we receive the request and calls a shoppingCart service, which checks if the data was received from the request is valid. If it is valid, the service interacts with the dao layer, which updates the database by inserting a new entry for a new transaction.

Afterward, you can return either the record of the transaction or a customized request with the 200 code from the dao layer. This will be passed back to the service layer and then to the controller layer, in which the controller will give the response back to the client.

#spring #postgres #spring-boot #java #jdbc