    @Test
    public void test1(){

        List<SysRole> sysRoleList=sysRoleService.SelectAll();
        log.info("[普通写法] - [{}]", sysRoleList);
        //分页
        PageInfo<Object> pageInfo= PageHelper.startPage(1,1).doSelectPageInfo(() -> sysRoleService.SelectAll());
        log.info("[分页]-[{}]",pageInfo);
    }