/** 添加表达式,匹配操作符 ">". */
 public Condition addGt(final ColumnField<?> columnField, long value) {
   return add(Restrict.gt(columnField.getFieldName(), value, ParamValuedType.LONG));
 }
 public Condition addGt(final String propertyName, long value) {
   return add(Restrict.gt(propertyName, value, ParamValuedType.LONG));
 }