我在名为 E：/portfolio.xls 的位置有一个名为 Excel 文件。我想通过java代码读取此文件。我使用 java 编写了一些代码，但无法读取该文件并显示一些错误。我是这类编码的新手。有人请帮我解决这些问题。我的 java 代码在下面：
/样本ExcelReading.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 仅部分支持读取 Excel xlsb 文件。它不能使用工作簿来完成，但从 POI 3.16-beta3 开始，它支持通过 XSSFBReader 流式读取此类文件。