java.text.ParseException：不可parsing的date：“42321”（这是关于将date从Excel格式转换为java格式，而不是DateFormat.parse。）

我正在从xlsx文件中获取数据，如下所示的xlsx文件的数据。

1 1 13/11/15 00:00:02 3 42.61 xxxx to xxxx 9 2 2 Axle Truck or Bus 2 1 13/11/15 00:00:12 1 27.11 xxxx to xxxx 3 2 3 Wheeler 3 1 13/11/15 00:00:15 3 22.65 xxxx to xxxx 7 2 LMV 2 Axle Light Motor Vehicle 4 1 13/11/15 00:00:21 2 18.76 xxxx to xxxx 7 2 LMV 2 Axle Light Motor Vehicle 5 1 13/11/15 00:00:21 3 18.76 xxxx to xxxx 9 2 2 Axle Truck or Bus 

从这个数据我读行明智，并通过使用下面的代码插入到数据库。

但问题是我无法从xlsx文件获得第三列的date，但是正在打印剩余。

下面是我的代码：

 processOneSheet("C:/Users/Penchalaiah/Desktop/New folder/"+hs.getAttribute("filename1")); System.out.println(hs.getAttribute("filename1")); System.out.println("clossing the connnection"); ps.close(); con1.close(); System.out.println("execution completed"); //request.setAttribute("message","THE XLSX DATA TRANSFERRED SUCCEFULLY"); // request.getRequestDispatcher("/HomePage.jsp").forward(request, response); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } /*try { ps.close(); con1.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ } public void processOneSheet(String filename) throws Exception { System.out.println("executing Process Method"); OPCPackage pkg = OPCPackage.open(filename); XSSFReader r = new XSSFReader( pkg ); SharedStringsTable sst = r.getSharedStringsTable(); XMLReader parser = fetchSheetParser(sst); // To look up the Sheet Name / Sheet Order / rID, // you need to process the core Workbook stream. // Normally it's of the form rId# or rSheet# InputStream sheet2 = r.getSheet("rId2"); System.out.println("Sheet2"); InputSource sheetSource = new InputSource(sheet2); parser.parse(sheetSource); sheet2.close(); } public XMLReader fetchSheetParser(SharedStringsTable sst) throws SAXException { XMLReader parser = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser"); ContentHandler handler = new SheetHandler(sst); parser.setContentHandler(handler); return parser; } /** * See org.xml.sax.helpers.DefaultHandler javadocs */ private class SheetHandler extends DefaultHandler { private SharedStringsTable sst; private String lastContents; private boolean nextIsString; String TxnNo; String SurveyId; Date date; String Time; String Lane; String Avspeed; String Direction; String VehicleCategory; String Axle_count; String Vehicle; int i = 1; private SheetHandler(SharedStringsTable sst) { this.sst = sst; } public void startElement(String uri, String localName, String name, Attributes attributes) throws SAXException { // c => cell if(name.equals("c")) { // Print the cell reference //System.out.print(attributes.getValue("r") + " - "); // Figure out if the value is an index in the SST String cellType = attributes.getValue("t"); if(cellType != null && cellType.equals("s")) { nextIsString = true; } else { nextIsString = false; } } // Clear contents cache lastContents = ""; } public void endElement(String uri, String localName, String name) throws SAXException { // Process the last contents as required. // Do now, as characters() may be called more than once if(nextIsString) { int idx = Integer.parseInt(lastContents); lastContents = new XSSFRichTextString(sst.getEntryAt(idx)).toString(); nextIsString = false; } // v => contents of a cell // Output after we've seen the string contents if(name.equals("v")) { if(i == 1){ TxnNo = lastContents; } if(i == 2){ SurveyId = lastContents; } if(i == 3){ try { //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ date = new SimpleDateFormat("dd/MM/yyyy",Locale.ENGLISH).parse(lastContents); //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ System.out.println("The Date is: "+date); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } //System.out.print(lastContents+"("+i+")"); } if(i == 4){ Time = lastContents; //System.out.print(lastContents+"("+i+")"); } if(i == 5){ Lane = lastContents; //System.out.print(lastContents+"("+i+")"); } if(i == 6){ Avspeed = lastContents; //System.out.print(lastContents+"("+i+")"); } if(i == 7){ Direction = lastContents; //System.out.print(lastContents+"("+i+")"); } if(i == 8){ VehicleCategory = lastContents; //System.out.print(lastContents+"("+i+")"); } if(i == 9){ Axle_count = lastContents; //System.out.print(lastContents+"("+i+")"); } if(i == 10){ Vehicle = lastContents; //System.out.print(lastContents+"("+i+")"); //System.out.print(lastContents+"("+i+")"); insertInToDb(TxnNo, SurveyId, date, Time, Lane, Avspeed,Direction, VehicleCategory, Axle_count, Vehicle); i = 0; } i++; } } public void characters(char[] ch, int start, int length) throws SAXException { lastContents += new String(ch, start, length); } } int gcc = 0; public void insertInToDb(String TxnNo,String SurveyId,Date date, String Time,String Lane,String Avspeed,String Direction, String VehicleCategory, String Axle_count, String Vehicle){ try { ps.setString(1, TxnNo); ps.setString(2, SurveyId); ps.setDate(3, (java.sql.Date) date); ps.setString(4, Time); ps.setString(5, Lane); ps.setString(6, Avspeed); ps.setString(7, Direction); ps.setString(8, VehicleCategory); ps.setString(9, Axle_count); ps.setString(10, Vehicle); ps.setString(11, (String)hs.getAttribute("zoneId1")); ps.setString(12, (String)hs.getAttribute("location1")); ps.executeUpdate(); 

我得到了例外// @@@@@@@@@@@@@
上面显示的代码是// @@@@@@@@@@@
当我正在打印date列的string，我得到42321这个值。

如何转换为该列值的date并插入到数据库？

Answer 1

Excel自1900年1月0日起将date存储为date。因此，您需要手动创build实际date，而不仅仅是parsing。

 @Test public void excel() { Calendar cl = Calendar.getInstance(); cl.set(Calendar.YEAR, 1900); cl.set(Calendar.MONTH, Calendar.JANUARY); cl.set(Calendar.DAY_OF_MONTH, 0); cl.add(Calendar.DAY_OF_MONTH, 42321 - 1); System.out.println(new SimpleDateFormat("dd/MM/yyyy").format(cl.getTime())); double excel = 2.31481481481481E-005; cl.set(Calendar.SECOND, (int) Math.round(excel * 86400)); cl.set(Calendar.MINUTE, (int) Math.round(excel * 86400 / 60)); cl.set(Calendar.HOUR_OF_DAY, (int) Math.round(excel * 86400 / 60 / 60)); System.out.println(new SimpleDateFormat("HH:mm:ss").format(cl.getTime())); } 

产量

 13/11/2015 00:00:02 

编辑

注意-1在43231附近，根据https://support.microsoft.com/en-us/kb/214326有在Excel中的错误，所以我们需要跳过不存在29/02/1900。

编辑

增加时间计算。