JXLS空列表前置时格式未正确偏移问题咨询

If you're encountering an issue where JXLS fails to shift your output format when a list preceding another section is empty, this is a common behavior that can be addressed with template adjustments or post-processing. Here's a breakdown of the issue and how to reproduce it:

Reproduction Code #

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

// Data lists
List<String> NON_EMPTY_LIST = new ArrayList<>(Arrays.asList("A", "B", "C"));
List<String> EMPTY_LIST = new ArrayList<>();

// Context variable names
String EMPTY_LIST_NAME = "emptyList";
String NON_EMPTY_LIST_NAME = "nonEmptyList";

// File paths for template and output
String INPUT_FILE_PATH = "./Test_Template.xls";
String OUTPUT_FILE_PATH = "./Output.xls";

// JXLS processing steps would go here (e.g., creating context, loading template, writing output)

Issue Explanation #

In the template, the section mapped to emptyList (which contains no data) is rendered as empty space instead of being collapsed. This causes subsequent content from nonEmptyList to stay in its original template position, rather than shifting up to fill the gap left by the empty list.

Possible Fixes #

• Template-level fix: Use JXLS conditional directives (like jx:if) to wrap the empty list section, ensuring it's only rendered if the list has elements.
• Post-processing: After generating the Excel file, programmatically remove any empty rows that result from the empty list section.

内容的提问来源于stack exchange，提问作者edu