java - 将数据拆分为多张 Apache POI

Question

我正在为我的 spring mvc webapp 使用 apache poi。我是 apache poi 的新手，我设法将数据生成到 .xls，数据是使用 model 从我的 Controller 传递的。

我的目标是当生成的数据数量达到 25 行时，我想继续生成下一个 25 行(26-50)到另一张表，依此类推。

@Override
protected void buildExcelDocument(Map model, HSSFWorkbook workbook,
        HttpServletRequest request, HttpServletResponse response)
        throws Exception {

    int rnum = 1;

    response.setHeader("Content-Disposition", "attachment; filename=\"" + new Date() + ".xls\"");
    List<Employee> employeeList = (List<Employee>) model.get("empRecords");//get from my controller

    HSSFSheet excelSheet = workbook.createSheet("Employee List"+rnum);
    setExcelHeader(excelSheet);
    setExcelRows(excelSheet, employeeList);
}

public void setExcelHeader(HSSFSheet excelSheet) {
    HSSFRow excelHeader = excelSheet.createRow(0);
    excelHeader.createCell(0).setCellValue("Id");
}

public void setExcelRows(HSSFSheet excelSheet, List<Employee> empList) {
    int record = 1;
    for (Employee a : empList) {
        HSSFRow excelRow = excelSheet.createRow(record++);
        excelRow.createCell(1).setCellValue(a.getId());
    }
}

以上是我目前所做的，我该如何进一步进行？

Answer 1

传递工作簿而不是电子表格。这将允许您在函数中创建一个新工作表。

 public void setExcelRows(HSSFWorkbook wb, List<Employee> empList) {
    int record = 1; int sheetNum = 0;
    HSSFSheet sheet = wb.createSheet("Employee List "+sheetNum);
    setExcelHeader(sheet);
    for (Employee a : empList) {
         if (record == 26){
             sheetNum++;
             sheet= wb.createSheet("Employee List "+ sheetNum);
             setExcelHeader(sheet);
             record = 1;
         }        
         HSSFRow excelRow = sheet.createRow(record++);
        excelRow.createCell(1).setCellValue(a.getId());
 }