安卓怎么连mysql数据库

@RestController
public class UserController {
    @Autowired
    private UserRepository userRepository;

    @GetMapping("/users")
    public List<User> getUsers() {
        return userRepository.findAll();
    }
}

public class MainActivity extends AppCompatActivity {
    private static final String URL = "https://yourserver.com/users";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        fetchUsers();
    }

    private void fetchUsers() {
        RequestQueue queue = Volley.newRequestQueue(this);
        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, URL, null,
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    // Handle the response
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    // Handle the error
                }
            });

        queue.add(jsonArrayRequest);
    }
}