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The REST has now become the standard way to develop web services. It's no more SOAP, who used to rule the world in last two decade. The SOAP and XML went very well together in past decade but it seems now REST and JSON have overtaken then and doing even better. Since Java is one of the most popular languages to develop backend services, there is a lot of demand for Java developers who knows web services and can implement and expose existing SOAP-based services into REST style, light-weight web services. This is an excellent opportunity for intermediate and experienced Java developers to learn a more job-oriented skill to keep themselves marketable and many Java developer has already started learning REST and RESTful web services in Java. Read more �

In order to efficiently work with REST and RESTful web service , good knowledge of HTTP is really helpful. Even though REST seems easy, designing a uniform and consistent RESTful API is a tough job . One of the tricky tasks is choosing right the HTTP method for right job e.g. when to use PUT vs POST. Once you know the meaning and purpose of different HTTP methods , it helps to choose the right method for the right job. You can divide HTTP methods into two main categories safe and idempotent . Safe methods are HTTP methods that do not modify the resource e.g. a GET request is safe because it doesn't modify the resource you are requesting e.g. data of a Book. Another safe HTTP method is HEAD , which doesn't change the resource representation on the Server, but all other HTTP methods e.g. POST , PUT , or DELETE are non-safe. Read more �

RESTful web services heavily rely on HTTP by design. They use different HTTP methods to perform their job and uses HTTP response code to inform clients about success or failure of a particular request. REST stands for Representational State transfer and it uses HTTP to allow two systems to communicate via remote calls. RESTFul web services is a collection of REST URI which points to resources. These URI can point to a single resource of a collection of resource. For example, you would expect /employee/101 to contain details employee with 101 and /employees to return a list of all employees. In RESTFul web service, HTTP request types signify the action to take for the resource. Read more �