Simple method returning string

Let's start with creating a simple REST Controller method returning a string:

    @RestController
    public class BasicController {
      @GetMapping("/welcome")
      public String welcome() {
        return "Hello World";
      }
    }

A few important things to note are as follows:

  • @RestController: The @RestController annotation provides a combination of @ResponseBody and @Controller annotations. This is typically used to create REST Controllers.
  • @GetMapping("welcome"): @GetMapping is a shortcut for @RequestMapping(method = RequestMethod.GET). This annotation is a readable alternative. The method with this annotation would handle a Get request to the welcome URI.

If we run Application.java as a Java application, it would start up the embedded Tomcat container. We can launch up the URL in the browser, as shown in the following screenshot:

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