Mybatisplus中的like查询问题

        @MethodAnnot()
        public static List<VwUserRole> getVwUserRoleByList(VwUserRole      vwUserRole){  
              return vwUserRoleService.selectList(
                        new EntityWrapper<VwUserRole>(vwUserRole).like("username",vwUserRole.getUsername(), sqlLike.DEFAULT));
        }

SELECT id,username,del_flag AS delFlag FROM vw_user_role WHERE username='a' AND del_flag='0' AND (username LIKE '%a%')

         @MethodAnnot()
        public static List<VwUserRole> getVwUserRoleByList(VwUserRole vwUserRole){
                EntityWrapper ew=new EntityWrapper();
                ew.setEntity(new VwUserRole());
                ew.eq("del_flag",'0');
                ew.like("username",vwUserRole.getUsername(), SqlLike.DEFAULT);
                return vwUserRoleService.selectList(ew);
        }

SELECT id,username,del_flag AS delFlag FROM vw_user_role WHERE (del_flag = 0 AND username LIKE '%a%')

like(boolean condition, String column, String value)
like(String column, String value)
like(boolean condition, String column, String value, SqlLike type)
like(String column, String value, SqlLike type)

    LEFT("left", "左边%"),
    RIGHT("right", "右边%"),
    CUSTOM("custom", "定制"),
    DEFAULT("default", "两边%");