Basics - rest style development

How to write it

• Representational State Transfer, Representation state transition

• advantage

  Hide access behavior , It is impossible to know what kind of operation the resource is through the address
  Writing simplification

http://locahost/users  		 Query all user information  GET

http://locahost/users/1		 Query individual user information  GET

http://locahost/users		 Add user information  POST

http://locahost/users		 Modify user information  PUT

http://locahost/users/1		 Delete user information  DELETE

• It's a style, not a norm , With REST Style development is called RESTFUL
• The name describing the module is usually plural , That is to say, add s Format description of , Indicates such resources , Not a single resource , for example users, books, accounts

Several notes

@RequestBody @RequestParam @PathVariable

• difference

  @RequestParam It is used to receive url Address reference perhaps Pass the form to the reference
  @RequestBody be used for receive json data
  @PathVariable Used to receive path parameters , Use { Parameter name } Describe path parameters

• application

  Later development , Hair Send request parameters more than one when , With json Mainly ,@RequestBody It is widely used
  send out Not json Format data , choose @RequestParam Receive request parameters
  use RESTful Development , When the number of parameters is small , For example, one , May adopt @PathVariable Receive request path variable , Usually used for id Pass value

@RestController

• yes @Controller and @ResponseBody The aggregate of

@PostMapping

• @RequestMapping(method = RequestMethod.POST)