无法推断 arguments Spring 域

Question

我有这个错误：

/Users/mj/Documents/Deploy/Heroku/Gym/src/main/java/app/gym/v1/Model/Domain/Gym.java:51:40
java: incompatible types: cannot infer type arguments for java.util.ArrayList<>
    reason: no instance(s) of type variable(s) E exist so that java.util.ArrayList<E> conforms to java.util.Set<app.gym.v1.Model.Domain.Sport>

我不知道为什么或出了什么问题，我每行代码检查两次，但缺少一些东西。

这是 model：

package app.gym.v1.Model.Domain;

import app.gym.v1.Model.User;
import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import javax.persistence.*;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Set;

@Entity
@Table(name = "gyms")
@NoArgsConstructor
@AllArgsConstructor
@Data
public class Gym implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(nullable = false, updatable = false)
    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
    private Long id;

    @OneToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "user_id", referencedColumnName = "id")
    private User user;

    @Column(name = "gym_name")
    private String gymName;

    @Column(name = "gym_phone")
    private String gymPhone;

    @Column(name = "gym_address")
    private String gymAddress;

    @Column(name = "logo", columnDefinition="LONGTEXT")
    private String logo;

    @OneToMany(mappedBy="gym")
    private Set<Product> products;

    @OneToMany(mappedBy="gym")
    private Set<Sport> sports;

    public void addSportForGym(Sport sport) {
        if(getSports()==null) {
            this.sports = new ArrayList<>();
        }
        getSports().add(sport);
        sport.setGym(this);
    }
}

这是服务实现：

package app.gym.v1.Utility.Impl;

import app.gym.v1.DAO.SportRepo;
import app.gym.v1.Model.Domain.Gym;
import app.gym.v1.Model.Domain.Sport;
import app.gym.v1.Service.SportService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.transaction.Transactional;
import java.util.List;

@Service
@Transactional
public class SportServiceImpl implements SportService {

    private SportRepo sportRepo;

    @Autowired
    public SportServiceImpl(SportRepo sportRepo) {
        this.sportRepo = sportRepo;
    }

    @Override
    public Sport findSportById(Long id) {
        return null;
    }

    @Override
    public List<Sport> findSportForPlayer(Long idPlayer) {
        return null;
    }

    @Override
    public List<Sport> findSportForCaptain(Long idCaptain) {
        return null;
    }

    @Override
    public List<Sport> findSportForGym(Long idGym) {
        return null;
    }

    @Override
    public Sport addSportForGym(Sport sport, Gym gym) {
        gym.addSportForGym(sport);
        return sportRepo.save(sport);
    }

    @Override
    public void addSportForPlayer(Long idSport, Long idPlayer) {

    }

    @Override
    public Sport editSport(Sport sport, Sport existSport) {
        existSport.setSpName(sport.getSpName());
        existSport.setDescription(sport.getDescription());
        existSport.setSpLogo(sport.getSpLogo());
        return sportRepo.save(existSport);
    }

    @Override
    public void deleteSport(Long id) {
        Sport existsSport = sportRepo.findById(id).orElse(null);
        sportRepo.delete(existsSport);
    }
}

这是服务：

package app.gym.v1.Service;

import app.gym.v1.Model.Domain.Gym;
import app.gym.v1.Model.Domain.Sport;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public interface SportService {


    Sport findSportById(Long id);
    List<Sport> findSportForPlayer(Long idPlayer);
    List<Sport> findSportForCaptain(Long idCaptain);
    List<Sport> findSportForGym(Long idGym);

    Sport addSportForGym(Sport sport, Gym gym);
    void addSportForPlayer(Long idSport, Long idPlayer);
    Sport editSport(Sport sport, Sport existSport);

    void deleteSport(Long id);
}

这是控制：

package app.gym.v1.Resource.API;

import app.gym.v1.Model.Domain.Gym;
import app.gym.v1.Model.Domain.Sport;
import app.gym.v1.Service.SportService;
import app.gym.v1.Utility.Constant.SwaggerConstant;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.responses.ApiResponses;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping(path = "/sport")
@Api(tags = {SwaggerConstant.API_TAG8})
@CrossOrigin(origins = "*")
public class SportControl {

    @Autowired
    private SportService sportService;

    @ApiOperation(value = "Finding Sports with id in the gym", notes = "Looking for sport gym with id", response = Sport.class)
    @ApiResponses({@ApiResponse(responseCode = "200", description = "Looking for specific sport's type in gym with id"),
            @ApiResponse(responseCode = "500", description = "Successfully register new user"),
            @ApiResponse(responseCode = "400", description = "The request is malformed or invalid"),
            @ApiResponse(responseCode = "404", description = "The resource URL was not found on the server"),
            @ApiResponse(responseCode = "403", description = "You are not authorized. Please authenticate and try again"),
            @ApiResponse(responseCode = "401", description = "You don't have permission to this resource")
    })
    @GetMapping("/find_sp_by_Id/{id}")
    Sport findSportById(@PathVariable Long id) {
        return sportService.findSportById(id);
    }

    @ApiOperation(value = "Looking for player in the gym", notes = "Looking for player", response = Sport.class)
    @ApiResponses({@ApiResponse(responseCode = "200", description = "Looking for specific sport's player in gym"),
            @ApiResponse(responseCode = "500", description = "Successfully player was founded"),
            @ApiResponse(responseCode = "400", description = "The request is malformed or invalid"),
            @ApiResponse(responseCode = "404", description = "The resource URL was not found on the server"),
            @ApiResponse(responseCode = "403", description = "You are not authorized. Please authenticate and try again"),
            @ApiResponse(responseCode = "401", description = "You don't have permission to this resource")
    })
    @GetMapping("/find_sp_for_player/{idPlayer}")
    List<Sport> findSportForPlayer(@PathVariable Long idPlayer) {
        return sportService.findSportForPlayer(idPlayer);
    }

    @ApiOperation(value = "Finding Sport in the gym", notes = "Looking for sport gym", response = Sport.class)
    @ApiResponses({@ApiResponse(responseCode = "200", description = "Looking for specific sport's type in gym"),
            @ApiResponse(responseCode = "500", description = "Successfully sport founded"),
            @ApiResponse(responseCode = "400", description = "The request is malformed or invalid"),
            @ApiResponse(responseCode = "404", description = "The resource URL was not found on the server"),
            @ApiResponse(responseCode = "403", description = "You are not authorized. Please authenticate and try again"),
            @ApiResponse(responseCode = "401", description = "You don't have permission to this resource")
    })
    @GetMapping("/find_sp_in_gym/{idGym}")
    List<Sport> findSportForGym(@PathVariable Long idGym) {
        return sportService.findSportForGym(idGym);
    }

    @ApiOperation(value = "Adding sport to the gym", notes = "Adding new sport type to the gym", response = Sport.class)
    @ApiResponses({@ApiResponse(responseCode = "200", description = "Adding sport type to the gym"),
            @ApiResponse(responseCode = "500", description = "Successfully sports added to the gym"),
            @ApiResponse(responseCode = "400", description = "The request is malformed or invalid"),
            @ApiResponse(responseCode = "404", description = "The resource URL was not found on the server"),
            @ApiResponse(responseCode = "403", description = "You are not authorized. Please authenticate and try again"),
            @ApiResponse(responseCode = "401", description = "You don't have permission to this resource")
    })
    @PostMapping("/add_sp_gym/{idGym}")
    Sport addSportForGym(@RequestBody Sport sport, @RequestBody Gym gym) {
        return sportService.addSportForGym(sport, gym);
    }

    @ApiOperation(value = "Adding Sport for the player", notes = "Adding player to the sport", response = Sport.class)
    @ApiResponses({@ApiResponse(responseCode = "200", description = "Adding player to the sport"),
            @ApiResponse(responseCode = "500", description = "Successfully player added"),
            @ApiResponse(responseCode = "400", description = "The request is malformed or invalid"),
            @ApiResponse(responseCode = "404", description = "The resource URL was not found on the server"),
            @ApiResponse(responseCode = "403", description = "You are not authorized. Please authenticate and try again"),
            @ApiResponse(responseCode = "401", description = "You don't have permission to this resource")
    })
    @PostMapping("/add_to_plauer/{sport_id}/{player_id}")
    void addSportForPlayer(@PathVariable Long idSport, @PathVariable Long idPlayer) {
        sportService.addSportForPlayer(idSport, idPlayer);
    }

    @ApiOperation(value = "Editing Sport in the gym", notes = "Editing sport in the gym", response = Sport.class)
    @ApiResponses({@ApiResponse(responseCode = "200", description = "Editing sport in the gym"),
            @ApiResponse(responseCode = "500", description = "Successfully Editing sport course"),
            @ApiResponse(responseCode = "400", description = "The request is malformed or invalid"),
            @ApiResponse(responseCode = "404", description = "The resource URL was not found on the server"),
            @ApiResponse(responseCode = "403", description = "You are not authorized. Please authenticate and try again"),
            @ApiResponse(responseCode = "401", description = "You don't have permission to this resource")
    })
    @PutMapping("/edit_sp/{id}")
    Sport editSport(@RequestBody Sport sport, @RequestBody Sport existSport) {
        return sportService.editSport(sport, existSport);
    }

    @ApiOperation(value = "Deleting Sport in the gym", notes = "Deleting sport in the gym", response = Sport.class)
    @ApiResponses({@ApiResponse(responseCode = "200", description = "Deleting sport in the gym"),
            @ApiResponse(responseCode = "500", description = "Successfully Deleted sport course"),
            @ApiResponse(responseCode = "400", description = "The request is malformed or invalid"),
            @ApiResponse(responseCode = "404", description = "The resource URL was not found on the server"),
            @ApiResponse(responseCode = "403", description = "You are not authorized. Please authenticate and try again"),
            @ApiResponse(responseCode = "401", description = "You don't have permission to this resource")
    })
    @DeleteMapping("/del_sp/{id}")
    void deleteSport(@PathVariable Long id) {
        sportService.deleteSport(id);
    }
}

addSportForGym 的问题这里的所有问题都与我的代码中的不同。 它一直告诉我没有实例