How to avoid data overwriting and style loss of merged cells when using EasyExcel for template filling?

EasyExcel template fill: Solve the problem of merged cell data overwrite and style loss

Data overwrites and style loss of merged cells are common problems when populating Excel templates with EasyExcel. This article provides effective solutions to help you complete template filling smoothly.

First, make sure you are using the latest version of EasyExcel, which often contains fixes and improvements for merged cell issues.

Second, double-check your Excel template to make sure the range and style of the merged cells are set correctly. EasyExcel requires precise template information when processing merging cells.

For data overwrite and style loss, the following measures are recommended:

1. Precise data range control: When filling data, be sure to ensure that the data range does not exceed the boundaries of the merged cells. For large amounts of data, it is recommended to pre-calculate the data volume to avoid over-range coverage.

2. Choose the right fill strategy: EasyExcel provides a variety of fill strategies, and choosing the right strategy is crucial. For example, WriteCellStyle can be used to accurately style cells to prevent styles from being lost.

3. Effectively handle merged cell styles: Use WriteCellStyle or CellStyleStrategy to keep the merged cell style consistent with the template. The following code example demonstrates how to customize a style policy:

    WriteCellStyle contentStyle = new WriteCellStyle();
   contentStyle.setWrapped(true);
   contentStyle.setVerticalAlignment(VerticalAlignment.CENTER);
   contentStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
   
   WriteCellStyle headerStyle = new WriteCellStyle();
   headerStyle.setWrapped(true);
   headerStyle.setVerticalAlignment(VerticalAlignment.CENTER);
   headerStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
   headerStyle.setBold(true); // Add title style WriteCellStyleStrategy strategy = new WriteCellStyleStrategy(headerStyle, contentStyle);
   
   EasyExcel.write(filePath, YourDataClass.class)
           .registerWriteHandler(strategy)
           .sheet("Sheet1")
           .doWrite(dataList);

Through the above methods, you can effectively avoid data overwriting and style loss of merged cells in EasyExcel template fill. Template inspection and policy selection are key to solving problems.

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