JAVA实现导出EXCEL
JAVA实现导出EXCEL
之前写过一篇文章 EasyExcel通过模板导出数据
发现一些问题导致无法在服务器上下载excel，问题显示好像是与easyExcel 和 POI Excel 有关，目测是版本，我研究的大半天也没搞出来，就换了一个方法，稳稳的。
注： 这里我使用的是HSSFWorkbook 支持.xls
如果大伙希望支持.xlsx 请将 HSSFWorkbook换成XSSFWorkbook即可
欢迎交流心得，互帮互助，共同进步
/**计划拜访EXCEL*/
@GetMapping("/excel/route-planning-store")
public void exportRoutePlanningStore1(HttpServletResponse response,
@RequestParam(value = "organize_ids",required = true) List organizeIds,
@RequestParam(value = "start_time",required = true) String startTime,
@RequestParam(value = "end_time",required = true) String endTime ) throws IOException {
List param = planVisitDataService.getRoutePlanningStore(organizeIds,startTime,endTime);
planVisitDataService.exportRoutePlanningStore(param,response);
}
@Override
public void exportRoutePlanningStore(List storelist, HttpServletResponse response) throws IOException {
ClassPathResource classPathResource = new ClassPathResource("templates/计划拜访导入模板.xls");
InputStream inputStream = classPathResource.getInputStream();
ExportRoutePlanningStoreUtils utils = new ExportRoutePlanningStoreUtils();
utils.exportExcel(inputStream, response, storelist);
}
public class ExportRoutePlanningStoreUtils {
private SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
@Autowired
private PlanVisitDataService planVisitDataService;
//声明一个该工具类的静态的内部对象
private static ExportRoutePlanningStoreUtils excelUtils;
@PostConstruct
public void init() {
excelUtils = this;
excelUtils.planVisitDataService = this.planVisitDataService;
}
/**
*tempPath 模板文件路径
*path 文件路径
*list 集合数据
*/
public void exportExcel(InputStream is, HttpServletResponse response, List storelist) {
HSSFWorkbook workbook = null;
HSSFSheet sheet = null;
try {
//is = new FileInputStream(newFile);// 将excel文件转为输入流
workbook =new HSSFWorkbook(is);
// 获取第一个sheet
sheet = workbook.getSheetAt(0);
} catch (Exception e1) {
e1.printStackTrace();
}
if (sheet != null) {
try {
// 写数据
//FileOutputStream fos = new FileOutputStream();
HSSFRow row = sheet.getRow(0);
if (row == null) {
row = sheet.createRow(0);
}
HSSFCell cell = row.getCell(0);
if (cell == null) {
cell = row.createCell(0);
}
// cell.setCellValue("计划拜访数据");
List list = getDate(storelist);
for (int i = 0; i < list.size(); i++) {
RoutePlanningStoreParam param = list.get(i);
//从第5行开始
row = sheet.createRow(i+4);
//根据excel模板格式写入数据....
createRowAndCell("".equals(param.getDate())?"":param.getDate(), row, cell, 0);
createRowAndCell("".equals(param.getSalesId())?"":param.getSalesId(), row, cell, 1);
createRowAndCell("".equals(param.getSalesName())?"":param.getSalesName(), row, cell, 2);
createRowAndCell("".equals(param.getStoreNo())?"":param.getStoreNo(), row, cell, 3);
createRowAndCell("".equals(param.getSalesName())?"":param.getStoreName(), row, cell, 4);
createRowAndCell("".equals(param.getMsg())?"":param.getMsg(), row, cell, 5);
}
// 通过浏览器 下载
response.reset();
response.setContentType("text/html;charset=UTF-8");
response.setContentType("application/x-msdownload");
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss");
String dateString = formatter.format(currentTime);
String newName = URLEncoder.encode( "计划拜访" +"_"+ dateString + ".xls", "UTF-8");
response.addHeader("Content-Disposition", "attachment;filename=\"" + newName + "\"");
workbook.write(response.getOutputStream());
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (null != is) {
is.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
/**
*根据当前row行，来创建index标记的列数,并赋值数据
*/
private void createRowAndCell(Object obj, HSSFRow row, HSSFCell cell, int index) {
cell = row.getCell(index);
if (cell == null) {
cell = row.createCell(index);
}
if (obj != null){
cell.setCellValue(obj.toString());
}
else
{
cell.setCellValue("");
}
}
/**
* 复制文件
*
* @param s
* 源文件
* @param t
* 复制到的新文件
*/
public void fileChannelCopy(File s, File t) {
try {
InputStream in = null;
OutputStream out = null;
try {
in = new BufferedInputStream(new FileInputStream(s), 1024);
out = new BufferedOutputStream(new FileOutputStream(t), 1024);
byte[] buffer = new byte[1024];
int len;
while ((len = in.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
} finally {
if (null != in) {
in.close();
}
if (null != out) {
out.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 读取excel模板，并复制到新文件中供写入和下载
*
* @return
*/
public File createNewFile(String tempPath, String rPath) {
// 读取模板，并赋值到新文件************************************************************
// 文件模板路径
String path = (tempPath);
File file = new File(path);
// 保存文件的路径
String realPath = rPath;
// 新的文件名
String newFileName = System.currentTimeMillis() + ".xls";
// 判断路径是否存在
File dir = new File(realPath);
if (!dir.exists()) {
dir.mkdirs();
}
// 写入到新的excel
File newFile = new File(realPath, newFileName);
try {
newFile.createNewFile();
// 复制模板到新文件
fileChannelCopy(file, newFile);
} catch (Exception e) {
e.printStackTrace();
}
return newFile;
}
private List getDate(List storelist) {
List params = Lists.newArrayList();
//获取拜访人账号（业代），用于后续升序排列
Set salesSet = new HashSet<>();
for (RoutePlanningStoreVo store : storelist) {
RoutePlanningStore planningStore = store.getRoutePlanningStore();
if (null != planningStore) {
salesSet.add(planningStore.getSalesId());
}
}
try {
//封装数据
if (null != storelist && CollectionUtils.isNotEmpty(storelist)) {
for (String id : salesSet) {
for (RoutePlanningStoreVo storeVo : storelist) {
StringBuffer dataBuf = new StringBuffer();
String data = dataBuf.append(storeVo.getYear()).append("/").append(storeVo.getMonth()).append("/").append(storeVo.getDay()).toString();
RoutePlanningStore planningStore = storeVo.getRoutePlanningStore();
if (null != planningStore) {
if (null != id && id.equals(planningStore.getSalesId())) {
params = setDataParam(params, data, planningStore);
}
if (null == id) {
params = setDataParam(params, data, planningStore);
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return params;
}
private List setDataParam(List params, String data, RoutePlanningStore planningStore) {
List routeStoreList = planningStore.getRouteStores();
if (null != routeStoreList && CollectionUtils.isNotEmpty(routeStoreList)) {
for (RouteStore routeStore : routeStoreList) {
RoutePlanningStoreParam routePlanningStoreParam = new RoutePlanningStoreParam();
routePlanningStoreParam.setDate(data);
routePlanningStoreParam.setSalesId(planningStore.getSalesId());
routePlanningStoreParam.setSalesName(planningStore.getSalesName());
routePlanningStoreParam.setStoreNo(routeStore.getStoreNo());
routePlanningStoreParam.setStoreName(routeStore.getStoreName());
routePlanningStoreParam.setMsg(routeStore.getMsg());
params.add(routePlanningStoreParam);
}
}
return params;
}