springboot实现用户名查找用户功能

public class UserEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
 
    private String name;
 
 
    public String getUsername() {
        return username;
    }
 
    public void setUsername(String username) {
        this.username = username;
    }
 
    private String username;
 
 
    private int role;
    private String avatar;
    private int status;
    private String password;
 
 
    public UserEntity(int id, String name, int role, String avatar, int status, String password,String username,String token) {
        this.id = id;
        this.name = name;
        this.role = role;
        this.avatar = avatar;
        this.status = status;
        this.password = password;
        this.username = username;
    }
 
    public UserEntity() {
 
    }
 
 
    public int getId() {
        return id;
    }
 
    public void setId(int id) {
        this.id = id;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
 
 
    public int getRole() {
        return role;
    }
 
    public void setRole(int role) {
        this.role = role;
    }
 
    public String getAvatar() {
        return avatar;
    }
 
    public void setAvatar(String avatar) {
        this.avatar = avatar;
    }
 
    public int getStatus() {
        return status;
    }
 
    public void setStatus(int status) {
        this.status = status;
    }
 
    public String getPassword() {
        return password;
    }
 
    public void setPassword(String password) {
        this.password = password;
    }
}

@Mapper
public interface UserMapper extends BaseMapper {
    List<UserEntity> findAllUser();
 
    UserDTO getUserByUsername(String subject);
}

   //用户名查询用户
    public ResultResponse findByUsername(String name) {
        QueryWrapper<UserEntity> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("name", name);
        UserEntity user = (UserEntity) userMapper.selectOne(queryWrapper);
        if (user != null) {
            return ResultResponse.returnToken(ResultResponse.success("查询成功", user));
        } else {
            return ResultResponse.returnToken(ResultResponse.fail("查询失败，该用户不存在"));
        }
    }

   //根据用户名查询用户--查询结果分每页十条显示
    @GetMapping("user/findByUsername")
    public ResultResponse<IPage<UserEntity>> findByUsername(@RequestParam String username,
                                                            @RequestParam Integer pageNumber,
                                                            @RequestParam Integer pageSize) {
        Page<UserEntity> userPage = new Page<>(pageNumber, pageSize);
//        IPage<UserEntity> user = (IPage<UserEntity>) userService.selectByUsername(userPage, username);
        UserEntity user = userService.selectByUsername(userPage,username);
 
        if (user == null) {
            return ResultResponse.error("没有找到匹配的用户");
        }
        return ResultResponse.ok("查询成功",user);
    }