Spring and REST API

Learning to build web apps with Spring boot and REST

This is a project that is in progress and i try and increase functionality and features as and when i find time. I am learning to create REST APIs with spring in Java.

Right now the project can handle GET (fetch) and POST(create) requests. The data being manipulated is from an Array List, however I plan to integrate the project with a distributed database (like Mongo and Cassandra) as time passes.

There are 3 java files.

1. User.java : class for users
2. userdao.java : handles the interaction with data for Users
3. UserResource.java : This is the restcontroller class.

All the necessary files for a spring web project have been downloaded from https://spring.io/ . This is the directory structure for my project

The project currently can perform the following operations

1. Find all users.
2. Find a particular user
3. Create a new user : Save ()

Server used is embedded tomcat from the spring framework. All outputs are generated as a jason file.
Http methods inplemented : GET and POST

Run file UserResource.java inside files folder.

Below are some screenshots of outputs from postman :https://chrome.google.com/webstore/detail/postman/fhbjgbiflinjbdggehcddcbncdddomop/related?hl=en

1. localhost/users
   

2. Getting data about user as json based on id : localhost/users/{id}
   

![alt text](

http://localhost:8080/users/3

3. Post request to create a new user
   

4. GET users after POST