What are the different types of request mapping in spring boot?

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In Spring Boot, request mappings define how HTTP requests are mapped to specific handler methods in a controller. Spring provides several annotations to handle different types of HTTP requests. Here are the different types of request mappings in Spring Boot:

  1. @RequestMapping: General-purpose mapping capable of handling multiple HTTP methods.
  2. @GetMapping: Handles HTTP GET requests.
  3. @PostMapping: Handles HTTP POST requests.
  4. @PutMapping: Handles HTTP PUT requests.
  5. @DeleteMapping: Handles HTTP DELETE requests.
  6. @PatchMapping: Handles HTTP PATCH requests.

1. @RequestMapping

  • Purpose: General-purpose mapping annotation that can handle all types of HTTP methods (GET, POST, PUT, DELETE, etc.) depending on its configuration.
  • Usage:
  @RequestMapping(value = "/path", method = RequestMethod.GET)
  public String handleGetRequest() {
      return "response";
  }

2. @GetMapping

  • Purpose: Handles HTTP GET requests, typically used for fetching resources.
  • Usage:
  @GetMapping("/path")
  public String handleGetRequest() {
      return "response";
  }

3. @PostMapping

  • Purpose: Handles HTTP POST requests, typically used for creating or submitting data.
  • Usage:
  @PostMapping("/path")
  public String handlePostRequest(@RequestBody Data data) {
      return "response";
  }

4. @PutMapping

  • Purpose: Handles HTTP PUT requests, typically used for updating resources.
  • Usage:
  @PutMapping("/path")
  public String handlePutRequest(@RequestBody Data data) {
      return "response";
  }

5. @DeleteMapping

  • Purpose: Handles HTTP DELETE requests, typically used for deleting resources.
  • Usage:
  @DeleteMapping("/path")
  public String handleDeleteRequest() {
      return "response";
  }

6. @PatchMapping

  • Purpose: Handles HTTP PATCH requests, typically used for partially updating resources.
  • Usage:
  @PatchMapping("/path")
  public String handlePatchRequest(@RequestBody Data data) {
      return "response";
  }

7. @RequestMapping with Multiple Methods

  • Purpose: You can use @RequestMapping to handle multiple HTTP methods for a single handler.
  • Usage:
  @RequestMapping(value = "/path", method = {RequestMethod.GET, RequestMethod.POST})
  public String handleGetAndPostRequests() {
      return "response";
  }