最近做要做一些报表导出的功能，由于表格内容比较复杂，直接生成excel比较麻烦，所以采用模板的方式来做，可惜自己不了解，也证明了自己技术有多差！通过多次资料，终于找到了适合自己的方法。特此记录，方便以后查找。
maven用到的包
<dependency> <groupId>net.sf.jxls</groupId> <artifactId>jxls-core</artifactId> <version>1.0.6</version> </dependency> <dependency> <groupId>net.sf.jxls</groupId> <artifactId>jxls-reader</artifactId> <version>1.0.6</version> </dependency>
Service代码
public void exportChargeCount(String yearMonth, String buildId, HttpServletRequest request,HttpServletResponse response)
{
String templateFile = request.getSession().getServletContext().getRealPath("/")+"/doc/reportTmp/billingInfo.xls";
Date date = BillingDateUtil.getBillingEndTime(Integer.valueOf(yearMonth.substring(0, 4)),Integer.valueOf(yearMonth.substring(5, 7)));
String buildName = dataCenter.getBuildInfoById(buildId).getBuildName();
String fileName = buildName+"("+yearMonth+")客户汇总报表.xls";
List<ChargeCountVO> list = this.reportDao.getChargeCount(DateUtil.getFormatNormal(date), buildId);
Map<String, Object> context = new HashMap<>();
XLSTransformer transformer = new XLSTransformer();
float sumMoney = 0;
for (ChargeCountVO chargeCountVO : list) {
sumMoney += chargeCountVO.getEnergyMoney();
}
context.put("billingList", list);
context.put("sumMoney", sumMoney);
context.put("billingDate", yearMonth);
context.put("buildName",buildName );
try {
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-disposition", "attachment;filename="+new String( fileName.getBytes("GBK"), "ISO8859-1" ));
Workbook workbook = transformer.transformXLS(new FileInputStream(templateFile), context);
OutputStream ouputStream = response.getOutputStream();
workbook.write(ouputStream);
ouputStream.flush();
ouputStream.close();
} catch (ParsePropertyException e) {
e.printStackTrace();
} catch (InvalidFormatException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}采用键值对的形式
xls模板
导出效果
大家可能会遇到的问题
1、web下载中文名称不显示的问题
2、模板使用公式，下载下来不计算的问题
3、合并单元格的问题
下面逐一解答
1、中文字符转码
response.setHeader("Content-disposition", "attachment;filename="+new String( fileName.getBytes("GBK"), "ISO8859-1" ));2、重新加载模板公式(通用方法)
/**
*
* 重新设置单元格计算公式
*
* */
private void resetCellFormula(HSSFWorkbook wb)
{
HSSFFormulaEvaluator e = new HSSFFormulaEvaluator(wb);
int sheetNum = wb.getNumberOfSheets();
for (int i = 0; i < sheetNum; i++)
{
HSSFSheet sheet = wb.getSheetAt(i);
int rows = sheet.getLastRowNum() + 1;
for (int j = 0; j < rows; j++)
{
HSSFRow row = sheet.getRow(j);
if (row == null)
continue;
int cols = row.getLastCellNum();
for (int k = 0; k < cols; k++)
{
HSSFCell cell = row.getCell(k);
// if (cell != null)
// System.out.println("cell["+j+","+k+"]=:"+cell.getCellType());
if (cell == null)
continue;
if (cell.getCellType() == HSSFCell.CELL_TYPE_FORMULA)
{
cell.setCellFormula(cell.getCellFormula());
// System.out.println("----公式："+cell.getCellFormula());
cell = e.evaluateInCell(cell);
// System.out.println("-----------"+cell.getNumericCellValue());
}
}
}
}
}使用方法
3、合并单元格
HSSFWorkbook workbook = (HSSFWorkbook )transformer.transformXLS(new FileInputStream(templateFile), context); HSSFSheet sheet = workbook.getSheetAt(0); sheet.addMergedRegion(new CellRangeAddress(起始行号,截至行号,起始列号,截至列号));
四个参数均从0开始
以上就是最近的总结。如果有问题大家可以互相交流。
本文出自 “GUI” 博客，请务必保留此出处http://xingfudehunpo.blog.51cto.com/1843260/1582141
原文：http://xingfudehunpo.blog.51cto.com/1843260/1582141