最近做一个月参与了公司两个小项目,毕业快两年,参与项目还真少!所以呢,本人掌握的知识还是很有限,完成了某些功能,需要放到这里,供日后参考!
[b]如何从数据库中导出数据生成Excel文档[/b]
首先第一步,我参考了POI 这个开源项目,从其官方网站download需要用到的jar包。 http://poi.apache.org/
然后项目采用的是Struts1.* 的版本,ok,那么放一些关键代码上来:
Action中的代码:
说明下: RawDataExportSearchForm 是前台页面用来查询的ActionForm,用于传入参数(parameters)
Service的代码:
结束了
[b]如何从数据库中导出数据生成Excel文档[/b]
首先第一步,我参考了POI 这个开源项目,从其官方网站download需要用到的jar包。 http://poi.apache.org/
然后项目采用的是Struts1.* 的版本,ok,那么放一些关键代码上来:
Action中的代码:
public ActionForward doExportExcel(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
ExportExcelService eeService = new ExportExcelService();
RawDataExportSearchForm rawDataExportSearchForm = (RawDataExportSearchForm) form;
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=\" " + "Reporting.xls" + "\"");
HSSFWorkbook wb = eeService.doExportExcel(request, rawDataExportSearchForm);
BufferedOutputStream buf = new BufferedOutputStream(response
.getOutputStream());
wb.write(buf);
buf.close();
return mapping.findForward("doExporting");
}
说明下: RawDataExportSearchForm 是前台页面用来查询的ActionForm,用于传入参数(parameters)
Service的代码:
public HSSFWorkbook doExportExcel(HttpServletRequest request, RawDataExportSearchForm form){
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet worksheet = workbook.createSheet("Sheet1");
// index from 0,0... cell A1 is cell(0,0)
HSSFRow rowHead = worksheet.createRow((short) 0);
HSSFCell cellHeadA = rowHead.createCell((short) 0);
cellHeadA.setCellValue("第一行列名");
HSSFCell cellHeadB = rowHead.createCell((short) 1);
cellHeadB.setCellValue("第一行列名");
HSSFCell cellHeadC = rowHead.createCell((short) 2);
cellHeadC.setCellValue("第一行列名");
HSSFCell cellHeadD = rowHead.createCell((short) 3);
cellHeadD.setCellValue("第一行列名");
…………
//第一行列名写完后
//从DB中获取Data,组装成HashMap
HashMap<Long, RawData> rawDataMap = getRawDataFromDB(form);
Set keys = rawDataMap.keySet();
RawData rawData = null;
int i = 1;
//遍历List中的每一个Object
for(Iterator iter = keys.iterator(); iter.hasNext(); i++){
rawData = rawDataMap.get(iter.next());
HSSFRow row = worksheet.createRow((short) i);
HSSFCell cellA = row.createCell((short) 0);
cellA.setEncoding(HSSFCell.ENCODING_UTF_16);
cellA.setCellValue(rawData.getField1());
HSSFCell cellB = row.createCell((short) 1);
cellB.setEncoding(HSSFCell.ENCODING_UTF_16);
cellB.setCellValue(rawData.getField2());
HSSFCell cellC = row.createCell((short) 2);
cellC.setEncoding(HSSFCell.ENCODING_UTF_16);
cellC.setCellValue(rawData.getField3());
HSSFCell cellD = row.createCell((short) 3);
cellD.setEncoding(HSSFCell.ENCODING_UTF_16);
cellD.setCellValue(rawData.getField4());
……
//till to end, cell.setEncoding(HSSFCell.ENCODING_UTF_16);是为解决显示中文出乱码问题
}
return workbook;
}
结束了