如何解决错误，同时阅读在Java中的Excel xls文件
我在名为E：/portfolio.xls的位置有一个Excel文件。 我想通过java代码读取这个文件。 我用java编写了一些代码，但是不能读取这个文件，并显示了一些错误。我是这类编码的新手。 有人请帮我解决这些问题。我的java代码是在下面：
/SampleExcelReading.java
package com.sampleexcelreading.core; import java.io.File; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Iterator; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.DateUtil; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.WorkbookFactory; import com.google.common.collect.ArrayListMultimap; import com.google.common.collect.Multimap; public class SampleExcelReading { public static void main(String[] args) { try { Multimap<String, String> portfolioHoldingMap = ArrayListMultimap.create(); File f=new File("E:/portfolio.xls"); org.apache.poi.ss.usermodel.Workbook workbook = WorkbookFactory.create(f); int numberOfSheets = workbook.getNumberOfSheets(); org.apache.poi.ss.usermodel.Sheet sheet=null; sheet = workbook.getSheetAt(0); Iterator<Row> rowIterator = sheet.iterator(); String currentSchemeNameCode = ""; String holding_date = ""; while (rowIterator.hasNext()) { Row row = rowIterator.next(); int rowNo = row.getRowNum(); if(rowNo < 0 || rowNo >= 1500) { continue; } Iterator<Cell> cellIterator = row.cellIterator(); while (cellIterator.hasNext()) { Cell cell = cellIterator.next(); String value = ""; switch (cell.getCellType()) { case Cell.CELL_TYPE_NUMERIC: if (DateUtil.isCellDateFormatted(cell)) { SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy"); value = sdf.format(cell.getDateCellValue()); } else { value = String.valueOf(cell.getNumericCellValue()); } break; case Cell.CELL_TYPE_STRING: value = cell.getStringCellValue(); break; case Cell.CELL_TYPE_BLANK: value = "0"; break; default: value = "0"; break; } if(cell.getColumnIndex() == 0 && rowNo > 0 && !value.equalsIgnoreCase("")) { value = value.trim().replaceAll(" +", " "); int firstHypenIndex = value.indexOf("-"); value = value.substring(firstHypenIndex + 2, value.length()); int firstAsAtIndex = value.indexOf(" as at "); holding_date = value.substring(firstAsAtIndex + 7, value.length()); String[] nav_date_splitted = holding_date.split("[\\/]+"); holding_date = nav_date_splitted[2] + "-" + nav_date_splitted[1] + "-" + nav_date_splitted[0]; value = value.substring(0, firstAsAtIndex); value = value.replaceAll("'","�"); schemeName.add(value.trim()); currentSchemeNameCode = value.trim(); } if(rowNo == 0 && cell.getColumnIndex() != 0) { value = value.replaceAll("'","�"); companyName.add(value); } if(rowNo > 0 && cell.getColumnIndex() != 0) { portfolioHoldingMap.put(currentSchemeNameCode,cell.getColumnIndex() + "||" + value.trim().replaceAll(" +", " ") + "||" + holding_date); } } } } catch (Exception e) { e.printStackTrace(); } } } / *这是我的错误* /
org.apache.poi.POIXMLException: java.lang.reflect.InvocationTargetException at org.apache.poi.xssf.usermodel.XSSFFactory.createDocumentPart(XSSFFactory.java:62) at org.apache.poi.POIXMLDocumentPart.read(POIXMLDocumentPart.java:403) at org.apache.poi.POIXMLDocument.load(POIXMLDocument.java:155) at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:186) at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:91) at com.advisorkhoj.amfi.SampleExcelReading.main(SampleExcelReading.java:27) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at org.apache.poi.xssf.usermodel.XSSFFactory.createDocumentPart(XSSFFactory.java:60) ... 5 more Caused by: java.io.CharConversionException: Characters larger than 4 bytes are not supported: byte 0x96 implies a length of more than 4 bytes at org.apache.xmlbeans.impl.piccolo.xml.UTF8XMLDecoder.decode(UTF8XMLDecoder.java:162) at org.apache.xmlbeans.impl.piccolo.xml.XMLStreamReader$FastStreamDecoder.read(XMLStreamReader.java:762) at org.apache.xmlbeans.impl.piccolo.xml.XMLStreamReader.read(XMLStreamReader.java:162) at org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.yy_refill(PiccoloLexer.java:3474) at org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.yylex(PiccoloLexer.java:3958) at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.yylex(Piccolo.java:1290) at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.yyparse(Piccolo.java:1400) at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.parse(Piccolo.java:714) at org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3439) at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1270) at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1257) at org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345) at org.openxmlformats.schemas.spreadsheetml.x2006.main.StyleSheetDocument$Factory.parse(Unknown Source) at org.apache.poi.xssf.model.StylesTable.readFrom(StylesTable.java:121) at org.apache.poi.xssf.model.StylesTable.<init>(StylesTable.java:92) ... 10 more
/我的jar文件是
dom4j-1.6.jar poi-3.9.jar poi-ooxml-3.9.jar poi-ooxml-schemas-3.7-betal1.jar xmlbeans-2.30.jar
Apache POI只能部分支持读取Excel xlsb文件。 它不能使用工作簿来完成，但是由于POI 3.16-beta3支持通过XSSFBReaderstream式读取这些文件。