excel转 pdf，可分页
通过模板将 excel 分页转换成 pdf 文档
总体思路：通过excle模板控制excle界面样式，然后把数据按照需要分成多个list，填充到各个sheet页，生成好excle后，再调用excle转pdf工具，完成动态多页excle转pdf。主要理清思路，代码比较简单。
注意：使用前，先安装下载的aspose-cells-8.5.2.jar包，然后把excel-license.xml放在resources目录下就行了。
excle转pdf方法
/** * excel转pdf */
public static void excel2pdf(Workbook workbook, String fileName) {
if (!getLicense()) { // 验证License 若不验证则转化出的pdf文档会有水印产生
return;
}
try {
//缩放到一个页面
PdfSaveOptions pdfSaveOptions = new PdfSaveOptions();
pdfSaveOptions.setOnePagePerSheet(true);
// 打开显示所有sheet
int sheetCount = workbook.getWorksheets().getCount();
int[] showSheets = new int[sheetCount];
for (int i = 0; i < sheetCount; i++) {
showSheets[i] = i;
}
//自动缩放比列
int[] autoDrawSheets = { 3};
//等比缩放
for (int i = 0; i < autoDrawSheets.length; i++) {
Worksheet worksheet = workbook.getWorksheets().get(i);
worksheet.getHorizontalPageBreaks().clear();
worksheet.getVerticalPageBreaks().clear();
}
//隐藏不需要sheet页
for (int i = 1; i < workbook.getWorksheets().getCount(); i++) {
workbook.getWorksheets().get(i).setVisible(false);
}
if (showSheets.length == 0) {
workbook.getWorksheets().get(0).setVisible(true);
} else {
for (int i = 0; i < showSheets.length; i++) {
workbook.getWorksheets().get(i).setVisible(true);
}
}
ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletResponse response = Objects.requireNonNull(requestAttributes).getResponse();
Objects.requireNonNull(response).setHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(fileName + ".pdf", "UTF-8"));
ServletOutputStream outputStream = response.getOutputStream();
workbook.save(outputStream, pdfSaveOptions);
outputStream.flush();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/** * 获取license 去除水印 * * @return */
public static boolean getLicense() {
boolean result = false;
try {
InputStream is = ExcelToPdfUtil.class.getClassLoader().getResourceAsStream("\\license.xml");
License aposeLic = new License();
aposeLic.setLicense(is);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
下载pdf方法
public void exportAdmissionPdf(LoadUserInfo loadUserInfo, SearchAdmissionEntity searchAdmissionEntity, HttpServletResponse response) {
try {
searchAdmissionEntity.setIsDelete(Constants.Status.NO);
searchAdmissionEntity.setUserId(loadUserInfo.getUserId());
List<VolunteerAdmissionResultDto> volunteerAdmissionResultDtos = volunteerAdmissionResultMapper.queryByVolunteerAdmissionResult(searchAdmissionEntity);
//excle模板
InputStream is = this.getClass().getResourceAsStream("/template/admission/export_pdf.xls");
//根据模板创建Excel工作簿
com.aspose.cells.Workbook workbook = new com.aspose.cells.Workbook(is);
//填充业务数据
setReportData(workbook, volunteerAdmissionResultDtos);
//excel合并转换pdf
String fileName = "录取明细";
ExcelToPdfUtil.excel2pdf(workbook, fileName);
} catch (Exception e) {
e.printStackTrace();
log.error(e.getMessage());
}
}
填充业务数据
/** * 填充业务数据 */
@SneakyThrows
private void setReportData(com.aspose.cells.Workbook workbook, List<VolunteerAdmissionResultDto> list) {
List<List<VolunteerAdmissionResultDto>> tmpList = new ArrayList<>();
//获取sheet模板行数
int maxRowNum = 50;
//总分页数，向上取整
int size = list.size();
int totalSheets = (int) Math.ceil((double) size / maxRowNum);
//业务数据按照总页数进行分组
int count = 0;
while (count < size) {
tmpList.add(list.subList(count, Math.min((count + maxRowNum), size)));
count += maxRowNum;
}
//根据模板复制sheet页
for (int i = 0; i < totalSheets; i++) {
if (i > 0) {
// 将模板中的内容复制到新建的Sheet页中
workbook.getWorksheets().addCopy(i - 1);
workbook.getWorksheets().get(i).setName("Sheet" + (i + 1));
}
}
//计划数
Integer planNum = 0;
//招生数
Integer num = 0;
//已分组数据按照对应sheet页填充数据
for (int j = 0; j < totalSheets; j++) {
List<VolunteerAdmissionResultDto> mapList = tmpList.get(j);
//初始化
int len = mapList.size();
Worksheet worksheet = workbook.getWorksheets().get(j);
Cells cells = worksheet.getCells();
//头部填充
int year = TimeUtil.getYear();
cells.checkRow(0).getCellOrNull(0).putValue(year + "年新生录取名册");
cells.checkRow(4).get(6).putValue(mapList.get(0).getBatch() != null ? mapList.get(0).getBatch() : "");
cells.checkRow(4).get(10).putValue(mapList.get(0).getNatureOfPlan() != null ? mapList.get(0).getNatureOfPlan() : "");
cells.checkRow(4).get(14).putValue(planNum);
cells.checkRow(4).get(18).putValue(num);
//中间内容填充
for (int i = 0; i < len; i++) {
cells.checkRow(i + 7).getCellOrNull(0).putValue(mapList.get(i).getAdmissionCertificateNo() != null ? mapList.get(i).getAdmissionCertificateNo() : "");
cells.checkRow(i + 7).getCellOrNull(1).putValue(mapList.get(i).getUsername() != null ? mapList.get(i).getUsername() : "");
cells.checkRow(i + 7).getCellOrNull(2).putValue(mapList.get(i).getSex() != null ? mapList.get(i).getSex() : "");
cells.checkRow(i + 7).getCellOrNull(3).putValue(mapList.get(i).getBirth() != null ? mapList.get(i).getBirth() : "");
cells.checkRow(i + 7).getCellOrNull(4).putValue(mapList.get(i).getNationality() != null ? mapList.get(i).getNationality() : "");
cells.checkRow(i + 7).getCellOrNull(5).putValue(mapList.get(i).getPoliticalAppearance() != null ? mapList.get(i).getPoliticalAppearance() : "");
cells.checkRow(i + 7).getCellOrNull(6).putValue(mapList.get(i).getGraduationSchool() != null ? mapList.get(i).getGraduationSchool() : "");
cells.checkRow(i + 7).getCellOrNull(7).putValue(mapList.get(i).getChinese() != null ? mapList.get(i).getChinese() : "");
cells.checkRow(i + 7).getCellOrNull(8).putValue(mapList.get(i).getMath() != null ? mapList.get(i).getMath() : "");
cells.checkRow(i + 7).getCellOrNull(9).putValue(mapList.get(i).getEnglish() != null ? mapList.get(i).getEnglish() : "");
cells.checkRow(i + 7).getCellOrNull(10).putValue(mapList.get(i).getPhysical() != null ? mapList.get(i).getPhysical() : "");
cells.checkRow(i + 7).getCellOrNull(11).putValue(mapList.get(i).getChemistry() != null ? mapList.get(i).getChemistry() : "");
cells.checkRow(i + 7).getCellOrNull(12).putValue(mapList.get(i).getScienceComprehensive() != null ? mapList.get(i).getScienceComprehensive() : "");
cells.checkRow(i + 7).getCellOrNull(13).putValue(mapList.get(i).getHistory() != null ? mapList.get(i).getHistory() : "");
cells.checkRow(i + 7).getCellOrNull(14).putValue(mapList.get(i).getPolitics() != null ? mapList.get(i).getPolitics() : "");
cells.checkRow(i + 7).getCellOrNull(15).putValue(mapList.get(i).getLiberalArtsComprehensive() != null ? mapList.get(i).getLiberalArtsComprehensive() : "");
cells.checkRow(i + 7).getCellOrNull(16).putValue(mapList.get(i).getTotalScoreOfCultureTest() != null ? mapList.get(i).getTotalScoreOfCultureTest() : "");
cells.checkRow(i + 7).getCellOrNull(17).putValue(mapList.get(i).getSportsPerformance() != null ? mapList.get(i).getSportsPerformance() : "");
cells.checkRow(i + 7).getCellOrNull(18).putValue(mapList.get(i).getPolicyBonus() != null ? mapList.get(i).getPolicyBonus() : "");
cells.checkRow(i + 7).getCellOrNull(19).putValue(mapList.get(i).getTotalScore() != null ? mapList.get(i).getTotalScore() : "");
}
//尾部填充页码
cells.getRows().get(66).get(17).putValue("第" + (j + 1) + "页，共" + totalSheets + "页");
}
}
