/** 添加表达式,匹配操作符 "betweeen". */
 public Condition addBetweeen(final ColumnField<?> columnField, Object value1, Object value2) {
   return add(Restrict.between(columnField.getFieldName(), value1, value2));
 }
 /** 添加表达式,匹配操作符 "betweeen". */
 public Condition addBetweeen(final String propertyName, Object value1, Object value2) {
   return add(Restrict.between(propertyName, value1, value2));
 }