Java 代码优化：如何高效获取用户角色

final List roles = Lists.newArrayList(); final Boolean existAppraise = activityAppraiseeService.existByEmpCode(empCode); if (BooleanUtils.isTrue(existAppraise)) { roles.add(UserTypeEnum.APPRAISEE.getValue()); } final Boolean existExaminer = activityExaminerService.existByEmpCode(empCode); if (BooleanUtils.isTrue(existExaminer)) { roles.add(UserTypeEnum.EXAMINER.getValue()); } return roles;