JXLS auto fit row height according to the content

Question

I'm using JXLS 2.3.0 with apache poi implementation.
And I use following code to create excel :

try{
   InputStream is = ObjectCollectionDemo.class.getResourceAsStream("/template.xls")
   OutputStream os = new FileOutputStream("target/output.xls")  
   Context context = new Context();
   context.putVar("employees", employees);
   JxlsHelper.getInstance().processTemplate(is, os, context);

   }

my generated excel file looks like next :

As above screenshot shows, the first 'Name' value only display partial.

But what I want is :

That is the content in excel cell can be wrapped and the row height can auto fit the cell content.

How can I do that? Thanks in advance.

-------------- Updated -----------------

the solution is:

1. did as @Andy said
2. format the corresponding cell as wrap text in your template file
3. (optional) after step 1 and 2, the 99% info of cell content can be shown, but still miss some. Then I open the template file and found it looks like next:

we can found that the } of ${a.name} is on the new line, change it to:

that is make ${a.name} is on one line, then all content can be shown.

Answer 1

I know this post is quite old, but i stumbled upon it as one of the first Google hits, and want to share my solution.

I implemented the auto-row-height feature for MS Excel 2010 in 3 steps.

Create a Command:

public class AutoRowHeightCommand extends AbstractCommand {

    // ... left out boilerplate

    @Override
    public Size applyAt(CellRef cellRef, Context context) {
        Size size = this.area.applyAt(cellRef, context);

        PoiTransformer transformer = (PoiTransformer) area.getTransformer();
        Row row = transformer.getWorkbook().getSheet(cellRef.getSheetName()).getRow(cellRef.getRow());
        row.setHeight((short) -1);

        return size;
    }
}

Configure the command to be used

// static method call:
XlsCommentAreaBuilder.addCommandMapping("autoRowHeight", AutoRowHeightCommand.class);

JxlsHelper.getInstance().processTemplate(is, os, context);

Make use of the command

In the template.xlsx file edit the cell-comment that already contains the loop-command, and add the autoRowHeight command as a new line, e.g.:

jx:each(items="myitems", var="i", lastCell="B4")
jx:autoRowHeight(lastCell="B4")

Thanks to Leonid Vysochyn and Franz Frühwirth, who lead me to this solution.

Answer 2

I have the same issue with Excel 2016. I created a xlsx-template and used the same solution row.setHeight((short) -1) , but it doesn't work because Excel 2016 adds dyDescent attribute to the row definition in the template. I couldn't find a way how to force Excel not to set this attribute.

The dyDescent attribute has a side effect; it sets the customHeight attribute to true even if the customHeight attribute is explicitly set to false.

I'am not sure, that you can implement this for xls-template, but... Here is my workaround:

    @Override
    public Size applyAt(CellRef cellRef, Context context) {
       // code from @Andy example 
        Row row = .....
        removeDyDescentAttr(row);
        return size;
    }

    private void removeDyDescentAttr(Row row) {
        XSSFRow xssfRow = (XSSFRow) row;
        CTRowImpl ctRow = (CTRowImpl) xssfRow.getCTRow();
        QName dyDescent = new QName("http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac");
        if (ctRow.get_store().find_attribute_user(dyDescent) != null) {
           ctRow.get_store().remove_attribute(dyDescent);
        }
    }