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  • Started with a Spring Starter Project, no dependencies selected
  • Deleted classes from src/test/java
  • Removed the spring-boot-starter-test dependency from the pom.xml
  • Replaced spring-boot-starter with spring-boot-starter-web
  • Run the Application.java As Spring Boot App
  • Navigating to http://localhost:8080/ yields Whitelabel Error Page
  • To change the embedded server's port, add server.port=${port:9090} to \src\main\resources\application.properties file
  • Add Model class with Attributes, getters, setters & default no arg constructor
  • Add Dao class to add, edit, del, get model objects
  • @RestController
  • @RequestMapping (value="/rest/entities" method = RequestMethod.GET , produces = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Collection<T>> methodForGETtingAllObjects() { return new ResponseEntity<Collection<T>>(..., HttpStatus.OK) }
  • Navigate to http://localhost:9090/users
  • @RequestMapping(value="/rest/entities/{entityId}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<T> getUserById(@PathVariable("entityId") int id) { //If found return new ResponseEntity<T>(..., HttpStatus.OK); //else return new ResponseEntity<T>(HttpStatus.NOT_FOUND);
  • Navigate to http://localhost:9090/users/1 & http://localhost:9090/users/2
  • @RequestMapping(value = "/rest/entities", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<T> createEntity(@RequestBody User user) { // If creation succeeded return new ResponseEntity<T>(..., HttpStatus.CREATED);
  • Send POST to http://localhost:9090/rest/users/ with Body raw {...} & Content-Type application/json
  • Then * Navigate to http://localhost:9090/users & http://localhost:9090/users/2
  • @RequestMapping(value = "/rest/entities/{entityId}", method = RequestMethod.PUT, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<T> updateEntity(@PathVariable("entityId") int id, @RequestBody T t) { //If found, then edit & return new ResponseEntity<T>(..., HttpStatus.OK); //else return new ResponseEntity<T>(HttpStatus.NOT_FOUND);
  • Send PUT to http://localhost:9090/rest/users/2 & http://localhost:9090/rest/users/3 with Body raw {...} & Content-Type application/json
  • Then Navigate to http://localhost:9090/users & http://localhost:9090/users/2
  • @RequestMapping(value = "/rest/entities/{entityId}", method = RequestMethod.DELETE,produces = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<T> updateEntity(@PathVariable("entityId") int id) { //If found, then delete & return new ResponseEntity<T>(..., HttpStatus.NO_CONTENT); //else return new ResponseEntity<T>(HttpStatus.NOT_FOUND);
  • Send DELETE to http://localhost:9090/rest/users/2 with Content-Type application/json
  • Then Navigate to http://localhost:9090/users & http://localhost:9090/users/2
  • Create an interface with all business methods. Implement it. Annotate the subclass with @Service. In controller declare a variable of type of the interface and annotate it with @Autowired. use this variable instead of the dao instance