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();
}
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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();
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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;
}
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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