Doubt with webservice put and delete method. How to implement in java?

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What I have to implement to provide a Webservice that supports PUT or DELETE.

I’m new to this webservice world if you could help me by sending me at least one link from where I can read something about.

java web-service rest

  • What have you tried? Please enter your code. You can explain why it has to be PUT and DELETE?

  • Just a moment I’ll test, I’m trying to get better here real quick, hold on.

  • If you don’t know anything about, here can be a good walk to start.

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    What do you mean, kicking you out? rs

1 answer

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There are some frameworks that facilitate the development of webservices in java, one of the most popular is the Spring.

Example of PUT and DELETE with Spring:

    @RequestMapping(value = "/user/{id}", method = RequestMethod.PUT)
    public ResponseEntity<User> updateUser(@PathVariable("id") long id, @RequestBody User user) {  
        //busca um usuário por id(Parametro passado pro método updateUser)      
        User currentUser = userService.findById(id);  
        if (currentUser==null) {
            return new ResponseEntity<User>(HttpStatus.NOT_FOUND);
        }
        currentUser.setName(user.getName());
        currentUser.setAge(user.getAge());
        currentUser.setSalary(user.getSalary());
        //Faz o update do usuário no banco
        userService.updateUser(currentUser);
        //Retorna o usuário junto com código 200
        return new ResponseEntity<User>(currentUser, HttpStatus.OK);
    }

    @RequestMapping(value = "/user/{id}", method = RequestMethod.DELETE)
    public ResponseEntity<User> deleteUser(@PathVariable("id") long id) {
        //Busca um usuário por id(passado por parâmetro)
        User user = userService.findById(id);
        if (user == null) {
            return new ResponseEntity<User>(HttpStatus.NOT_FOUND);
        }
        //Deleta o usuário
        userService.deleteUser(user);
        return new ResponseEntity<User>(HttpStatus.NO_CONTENT);
    }

The Spring is a widely used and practical framework. A suggestion would be to consider the possibility of using Vraptor where the Controllers are written in a cleaner way, ex:

@Controller
public class ClienteController {

    @Post("/cliente")
    public void adiciona(Cliente cliente) {...}

    @Path("/")
    public List<Cliente> lista() {
        return ...
    }

    @Get("/cliente")
    public Cliente visualiza(Cliente cliente) {
        return ...
    }
    @Get("/cliente/{codigo}")
    public Cliente listarPorCodigo(Long codigo) {
        return ...
    }

    @Delete("/cliente")
    public void remove(Cliente cliente) { ... }

    @Put("/cliente")
    public void atualiza(Cliente cliente) { ... }
}

Materials:

CRUD with Spring

REST with Vraptor

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