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1、单元格数据样例：
你好\r\n大家好\r\n
2、增加单元格拦截器
/** * excel换行符处理 */ @Slf4j public class WrapCellWriteHandler implements
CellWriteHandler { @Override public void
afterCellDispose(CellWriteHandlerContext context) { Cell cell =
context.getCell(); Row row = cell.getRow(); String value =
cell.getStringCellValue(); if (value.contains("\r\n")) {
context.getFirstCellData().getOrCreateStyle().setWrapped(true); int length =
Math.max(value.split("\r\n")[0].length(), 10); int headLength =
Math.max(context.getWriteSheetHolder().getSheet().getRow(0).getCell(cell.getColumnIndex()).getStringCellValue().length(),
10); cell.getSheet().setColumnWidth(cell.getColumnIndex(), Math.max(length,
headLength) * 256); row.setHeight((short) (value.split("\r\n").length * 256));
} } }
3、注册
EasyExcel.write(fileName).registerWriteHandler(new WrapCellWriteHandler());