when I post ,it shows error of 404 not found in spring boot even when I have declared #RequestMapping - spring-boot

Question

I have made a userservice where I want to add new user, find user by id and also by other attributes. I have extended JPA repository since I learned that there is already functions. But I can't even save a new user.
This is my model
package bt.gov.dit.userservice.model;
import javax.persistence.*;
#Entity
public class User {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column
private Long Id;
#Column
private String name;
#Column
private String email;
#Column
private String role;
public Long getId() {
return Id;
}
public void setId(Long id) {
Id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public User(Long id, String name, String email, String role) {
Id = id;
this.name = name;
this.email = email;
this.role = role;
}
public User() {
}
}
This is my repository
package bt.gov.dit.userservice.dao;
import bt.gov.dit.userservice.model.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface UserRepository extends JpaRepository<User,Long> {
User findUserByRole(String role);
}
This is my service
package bt.gov.dit.userservice.service;
import bt.gov.dit.userservice.dao.UserRepository;
import bt.gov.dit.userservice.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
#Service
public class UserService {
#Autowired
private UserRepository userRepository;
public User save(User user){
return userRepository.save(user);
}
public User getByRole(String role){
return userRepository.findUserByRole(role);
}
}
And this is my Controller
package bt.gov.dit.userservice.controller;
import bt.gov.dit.userservice.model.User;
//import bt.gov.dit.userservice.service.UserService;
import bt.gov.dit.userservice.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import javax.validation.Valid;
#RestController
#RequestMapping("/api")
public class UserController {
#Autowired
private UserService userService;
#PostMapping
public ResponseEntity<User> create(#Valid #RequestBody User user) {
User updated = userService.create(user);
return new ResponseEntity<User>(updated, new HttpHeaders(), HttpStatus.OK);
}
#GetMapping("/{role_id}")
public ResponseEntity<User> getUserByRole(#PathVariable("role_id") String role)
{
User entity = userService.getByRole(role);
return new ResponseEntity<User>(entity, new HttpHeaders(), HttpStatus.OK);
}
}
I have just started learning Spring boot and I can't seem to understand what is wrong in code. I want to insert/save new user. But when I call /api/user it says 404 not found. I am using h2 in-memory db.

Answer 1

I think the issue is the controller method argument name - role->role_id
#GetMapping("/{role_id}")
public ResponseEntity<User> getUserByRole(#PathVariable("role_id") String role_id)
{
User entity = userService.getByRole(role_id);
return new ResponseEntity<User>(entity, new HttpHeaders(), HttpStatus.OK);
}
the role_id should be same as you mentioned in the routes.
Route example->localhost:8080/api/2

Answer 2

you need to map the other part of the request like this:
#PostMapping(value="/user", consumes = MediaType.APPLICATION_JSON_UTF8_VALUE )
I also recommend you to use Springfox Swagger UI using the annotation #EnableSwagger2
This will provide you an user interface with all requests at http://localhost:8080/swagger-ui.html
Link:
https://www.baeldung.com/swagger-2-documentation-for-spring-rest-api