自动换成Apache POI（Excel）

您应该可以使用Cell样式实现此目的，我尝试将一个示例组合起来显示：

public class SO{    public static void main(String[] args) {        try { FileInputStream is = new FileInputStream(new File("D:\Users\user2777005\Desktop\bob.xlsx")); XSSFWorkbook wb = new XSSFWorkbook(is); String header = "123456789123456789123456789123456789123456789123456789123456789123456789123456789123456789123456789"; Sheet sheet = wb.getSheet("Sheet1"); sheet.setColumnWidth(0, 18000); Row row = sheet.createRow(0); Cell cell = row.createCell(0); if(header.length() > 50){ //Length of String for my test     sheet.setColumnWidth(0, 18000); //Set column width, you'll probably want to tweak the second int     CellStyle style = wb.createCellStyle(); //Create new style     style.setWrapText(true); //Set wordwrap     cell.setCellStyle(style); //Apply style to cell     cell.setCellValue(header); //Write header } wb.write(new FileOutputStream(new File("D:\Users\user2777005\Desktop\bob.xlsx")));        } catch (IOException e) { e.printStackTrace();        }    }}

祝好运！