java 远程文件url 转为输入流
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URL url = new URL(fileUrl);HttpURLConnection conn = (HttpURLConnection)url.openConnection();//设置超时间为3秒conn.setConnectTimeout(3*1000);//防止屏蔽程序抓取而返回403错误conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");//得到输入流InputStream inputStream = conn.getInputStream(); |
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public static AjaxModel parseExcelForInfo(InputStream inputStream, String fileName, int taskId) { try { //创建workbook对象 Workbook workbook = null; if (fileName.contains(".xlsx")) { workbook = new XSSFWorkbook(inputStream); } else if (fileName.contains(".xls")) { workbook = new HSSFWorkbook(inputStream); } else { return AjaxModel.failed(-1, "文件类型不正确"); } //获取第一个sheet表 Sheet sheetAt = workbook.getSheetAt(0); if (sheetAt != null) { // TODO 校验excel头 Row headRow = sheetAt.getRow(0); for (int i = 0; i < BusinessSettlementConstants.TEMPLATE_COULMN.length; i++) { if (!FileUtil.getCellFormatValue(headRow.getCell(i)).trim().equals(BusinessSettlementConstants.TEMPLATE_COULMN[i])) { LOGGER.info("parseExcelForInfo excel头部信息顺序不正确，getCellFormatValue(headRow.getCell(i)):{}," + "BusinessSettlementConstants.TEMPLATE_COULMN[i]:{},taskId:{}", FileUtil.getCellFormatValue(headRow.getCell(i)), BusinessSettlementConstants.TEMPLATE_COULMN[i], taskId); return AjaxModel.failed("excel标题头顺序不正确:" + FileUtil.getCellFormatValue(headRow.getCell(i))); } } int startRowNum = sheetAt.getFirstRowNum() + 1; int lastRowNum = sheetAt.getLastRowNum(); LOGGER.info("解析excel开始taskId:{}，从【{}】行开始,到第【{}】行结束", taskId, startRowNum, lastRowNum); List<Map<String, String>> dataList = new ArrayList<Map<String, String>>(); for (int rowNum = startRowNum; rowNum <= lastRowNum; rowNum++) { // 每一行数据 Row row = sheetAt.getRow(rowNum); Map<String, String> map = new HashMap<>(); LOGGER.info("parseExcelForInfo row:{}", row); if (row != null && row.getCell(0) != null && StringUtils.isNotEmpty(row.getCell(0).getStringCellValue()) && row.getCell(2) != null && row.getCell(4) != null) { LOGGER.info("parseExcelForInfo row:{},cell:{}", row, row.getCell(0)); // 姓名 map.put("userName", FileUtil.getCellFormatValue(row.getCell(0))); dataList.add(map); } } LOGGER.info("--------------解析完成 dataList:{}", dataList); if (dataList.size() <= 0) { return AjaxModel.failed(-1, "解析表格数据为空"); } AjaxModel success = AjaxModel.success(); success.getData().put("dataList", dataList); return success; } else { LOGGER.info("sheet内容为空"); return AjaxModel.failed(-1, "表格内容为空"); } } catch (Exception e) { LOGGER.error("parseExcelForInfo 解析异常", e); } return AjaxModel.failed(-1, "解析表格异常");} |
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public static String getCellFormatValue(Cell cell) { cell.setCellType(CellType.STRING); return cell.getStringCellValue();} |
根据URL网址获取输入流
方法一
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//文件访问路径String url = "";InputStream intstream = new URL(url).openStream(); |
方法二
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public InputStream getInputStreamByUrl(String strUrl) { HttpURLConnection conn = null; try { URL url = new URL(strUrl); conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(20 * 1000); final ByteArrayOutputStream output = new ByteArrayOutputStream(); IOUtils.copy(conn.getInputStream(), output); return new ByteArrayInputStream(output.toByteArray()); } catch (Exception e) { logger.error("getInputStreamByUrl 异常,exception is {}", e); } finally { try { if (conn != null) { conn.disconnect(); } } catch (Exception e) { } } return null; } |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/kangzhuang521/article/details/104491488
