Java stream filter null values
Overview Java List and Map may contain null values (elements) and sometimes we need to filter those null elements to avoid NullPointerException before going to process it using stream API….
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Spring Jackson exclude null fields
1. Overview This article is about Spring Jackson exclude null fields or we can say Spring Jackson ignore the null value at the time of serialization. While using RestController in Spring…
NodeJS change server port
1. Overview In this article, we will learn how to change node.jsserver port. We will explore the different techniques to change the port. By Setting The environment variable. Using the configuration file….
Spring boot JPA Multi Tenancy example
1. Overview In this article, We will learn Spring JPA Multi Tenancy example or Spring JPA database routing Example. While developing SAAS (Software As A Service) based application we require to change…
Spring MVC Read HTTP Request header
1. Overview This article is about Spring MVC read HTTP Request header in Spring boot Rest Service or Spring MVC Controller. @RequestHeader is a annotation using that we can read individual healer or…
NodeJS JSON Web Service Example
1. Overview In this article, we will learn how to develop JSON web services in node js along with JSON data. we will see the specific example for insert, update…
Spring Jackson property naming strategy
1. Overview Jackson is a very popular library to convert Java object to JSON. while converting POJO to JSON, It will consider property name will as key. But sometimes we require…
Spring JPA Projection example
1. Overview In this article, We will learn Spring JPA Projection example using interface and class. Projection means select only specific column instead of fetching all the columns from the…
Spring Boot Liquibase Example
1. Overview Database schema migration is performed on a database whenever it is necessary to update/revert changes in the database or need to migrate the database from one version to…
Spring JPA query IN clause example
1. Overview In this article we will learn, Spring JPA query IN clause example or Spring JPA IN or NOT IN query with an example. In SQL query, when we…