JAX-RS

Almost in every RESTful Web Service application, I have to do the DTO to Entity and then Entity to DTO conversion. DTO stands for Data Transfer Object and is a simple Plain Old Java Object which contains class properties and getters and settings methods for accessing those properties. In this blog post, I am going…

Read More DTO to Entity and Entity to DTO Conversion

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…

Read More Configure Spring Data JPA in Jersey 2 JAX-RS App

Adding dependency injection support into Jersey 2 Web Services application that uses HK2 is not very straightforward. So, I created this page to document things I needed to do in my Jersey 2 RESTful Web Services app to make the Dependency Injection work. Hope you will find it useful. Create a new class that extends AbstractBinder. This…

Read More Dependency Injection with HK2 in Jersey and JAX-RS

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…

Read More RESTful Web Services with Jersey and Spring Data JPA – Cheat Sheet

When you start building a mobile app most likely you will need to build pages like user Sign up and once user has successfully registered, you will need to create a Sign in page. I have created many video tutorial how to implement these pages in Swift and if you follow those you will no doubt…

Read More REST API with Java JAX-RS. Create and Deploy to Amazon Cloud.

In this blog post I am going to share with you a way to create a RESTful Web Service to: Create a new user profile, Generate and save in database a user secure user password rather than an actual password provided by user, Return back as a response a custom user profile object(JSON) with information that…

Read More RESTful Web Service to Save a New User in Database

Hibernate is a great framework to use to persist data into a database when building RESTful Web Services for your mobile application with Jersey and JAX-RS. In most of the projects I have participated when designing RESTful Web Services for Mobile App we used MySQL database server and Hibernate framework to store user data which…

Read More Persist Java Object in MySQL Database With Hibernate

If one of you RESTful Web Service Endpoints built with Jersey JAX-RS needs to initiate image download, you can use the following example to let user download an image stored on your server  when they access a certain web service end point. The below example downloads a PNG image specified by @Produces(“image/png”) but you can easily…

Read More Image Download in Jersey JAX-RS

To make our Jersey RESTful Web Service Application be able to @Autowire service classes and inject Java Beans we will need to add to it a support for Spring Dependency Injection(DI) and below I am going to share with you how to do it. To add Spring DI support to my JAX-RS application, I am…

Read More Add Spring Dependency Injection Support to a JAX-RS Jersey App

We can use @HeaderParam annotation to read the Request HTTP Headers when building RESTFul Web Services. And knowing how to use @PathParam and @QueryParam annotations, the use of @HeaderParam annotation becomes very obvious. We just use it the same way as we use the @QueryParam for example. JAX-RS @HeaderParam Annotation Code Example. JAX-RS gives us a couple of ways to…

Read More JAX-RS @HeaderParam. Reading Request Headers.

@QueryParam annotation allows us to read the request parameter values which were passed as a part of URL query string for example: site.com/api/users/r4ghtaf43c3n/messages?start=1&limit=50 where site.com is your web site domain name, /api/users/ is the path to your Root Resource, r4ghtaf43c3n is the value of specific user id and can be read with @ParthParam annotation, /messages is…

Read More JAX-RS @QueryParam. Reading URL Query Parameters.