In this short blog post I am going to share with you how to create a new Amazon AWS S3 bucket in Java and how to set permissions on it so that any user can read files from it but only you, the owner will have write access. You can use the code below with…Read More Create Amazon AWS S3 Bucket in Java
Often we need to load up and read a value from a property file which is stored in a WEB-INF folder of our web app. In the below example I am going to share with you how to create a web service which accepts a key, reads key value from a property file and returns…Read More Load Properties File from WEB-INF in JAX-RS Jersey App
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.
Earlier I have shared with you how to use JAX-RS to access HTTP GET Request and how extract URI Query Parameters and how to read Path Parameters. In this blog post I am going to share with you how to handle HTTP POST request and how to read the content of HTTP Request Body as…Read More Jersey HTTP Post Example
@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.
In this blog post I am going to share with you how to read the PathParam value which was included in the request URI. And before you continue further I would like to mention that I have recorded a video lesson on how to use the @PathParam annotation and made it part of my video…Read More JAX-RS @PathParam. Reading Path Parameters.
In this blog post I am going to share with you how to handle HTTP GET request in your Java Web Service created with Jersey framework and how to response back with XML or JSON Response. If you do not have your Java RESTful Web Service created yet please follow the below link to a…Read More Jersey HTTP GET Example
Learning how to convert Java objects into JSON and JSON into Java will help you a lot in your work as a full stack mobile app developer. In this blog post I will share with you code examples which will help you do most of the tasks you will even need to do when working with JSON and…Read More Convert Java into JSON and JSON into Java. All Possible Examples.
In this blog post I will share with you how to use Maven to generate a very simple Jersey application which you can then use to build RESTful web services for your mobile app. I will also show you how to edit pom.xml file to add needed dependencies, so that your Jersey app is able…Read More Create Jersey JAX-RS Project with Maven
In this blog post I am going to share with you how to generate java project with Maven. You will also learn how to package your project with all the dependent libraries into single jar file and run you java application via command line in terminal window. This tutorial assumes you have installed maven on…Read More Create Java Project with Maven
When user signs up with our Mobile App we ask them to come up with a secure password and then we take that password and store it in database. We all know it is not secure to store user password as is because anyone who looks at the users database table will be able to…Read More Encrypt User Password Example in Java
In this short code example we will generate a random alpha-numeric string of characters which can be used as a user password. The code example below allows you to specify the password length. Although, the longer the password is the more difficult it is to brute force it but keep in mind that the longer…Read More Generate Secure Password In Java