Spring - @RequestMapping

TL;DR

It is used to map web requests to Spring Controller methods.

In Spring Web applications, @RequestMapping is one of the most used annotations. HTTP requests are mapped to MVC and REST controller handler methods with this annotation.

URL handler using @RequestMapping annotation as it follows here:

@RequestMapping(value = "/get/{id}", method = RequestMethod.GET) 

The alternative approach in other words possible short version is:

@GetMapping("/get/{id}") 

We can also implement other mappings mentioned below:

To sum up, it is a better approach to use RequestMapping or alternative mapping in class level controllers since all your requests and responses will be handled in controller. Here is a full code example:

@Controller @RequestMapping(value = "/orders", method = RequestMethod.GET) public class DemoController { @RequestMapping(value = "/{orderId}", method = RequestMethod.GET) @ResponseBody public String getOrder(@PathVariable final String orderId) { return "Order ID: " + orderId; } @RequestMapping(value = "/addProduct", method = RequestMethod.POST) public String addProductPost(@ModelAttribute("product") Product product) { // some code } // other mappings // ... }