优化这段代码boolean flag = permissionService.isPermitted("system:course:list"); if (flag) { return listAll(vo); } flag = permissionService.isPermitted("system:course:list:dept"); if (flag) { return listByDept(vo); } flag = permissionService.isPermitted("system:course:list:creator"); if (flag) { return listByCreator(vo); } return R.failed("对不起，您没有课程查询权限");

您可以尝试使用switch-case语句来优化这段代码，减少重复的判断：

String permission = "";
if(permissionService.isPermitted("system:course:list")){
    permission = "listAll";
} else if(permissionService.isPermitted("system:course:list:dept")){
    permission = "listByDept";
} else if(permissionService.isPermitted("system:course:list:creator")){
    permission = "listByCreator";
} else {
    return R.failed("对不起，您没有课程查询权限");
}

try {
    Method method = this.getClass().getMethod(permission, vo.getClass());
    return (R) method.invoke(this, vo);
} catch (Exception e) {
    e.printStackTrace();
    return R.failed("系统异常，请联系管理员");
}

这样可以将重复的代码进行封装，提高了代码的可读性和可维护性。