我正在使用 Apache POI(XSSF API) 来读取 xlsx 文件。当我尝试读取文件时，出现以下错误：
org.apache.poi.POIXMLException: org.apache.poi.openxml4j.exceptions.InvalidFormatException: Package should contain a content type part [M1.13]
Code:
public class ReadXLSX
{
private String filepath;
private XSSFWorkbook workbook;
private static Logger logger=null;
private InputStream resourceAsStream;
public ReadXLSX(String FilePath)
{
logger=LoggerFactory.getLogger("ReadXLSX");
this.filepath=FilePath;
resourceAsStream = ClassLoader.getSystemResourceAsStream(filepath);
}
public ReadXLSX(InputStream fileStream)
{
logger=LoggerFactory.getLogger("ReadXLSX");
this.resourceAsStream=fileStream;
}
private void loadFile() throws FileNotFoundException, NullObjectFoundException
{
if(resourceAsStream==null)
throw new FileNotFoundException("Unable to locate give file..");
else
{
try
{
workbook = new XSSFWorkbook(resourceAsStream);
}
catch(IOException ex)
{
}
}
}// end loadxlsFile
public String[] getSheetsName()
{
int totalsheet=0;int i=0;
String[] sheetName=null;
try {
loadFile();
totalsheet=workbook.getNumberOfSheets();
sheetName=new String[totalsheet];
while(i<totalsheet)
{
sheetName[i]=workbook.getSheetName(i);
i++;
}
} catch (FileNotFoundException ex) {
logger.error(ex);
} catch (NullObjectFoundException ex) {
logger.error(ex);
}
return sheetName;
}
public int[] getSheetsIndex()
{
int totalsheet=0;int i=0;
int[] sheetIndex=null;
String[] sheetname=getSheetsName();
try {
loadFile();
totalsheet=workbook.getNumberOfSheets();
sheetIndex=new int[totalsheet];
while(i<totalsheet)
{
sheetIndex[i]=workbook.getSheetIndex(sheetname[i]);
i++;
}
} catch (FileNotFoundException ex) {
logger.error(ex);
} catch (NullObjectFoundException ex) {
logger.error(ex);
}
return sheetIndex;
}
private boolean validateIndex(int index)
{
if(index < getSheetsIndex().length && index >=0)
return true;
else
return false;
}
public int getNumberOfSheet()
{
int totalsheet=0;
try {
loadFile();
totalsheet=workbook.getNumberOfSheets();
} catch (FileNotFoundException ex) {
logger.error(ex.getMessage());
} catch (NullObjectFoundException ex) {
logger.error(ex.getMessage());
}
return totalsheet;
}
public int getNumberOfColumns(int SheetIndex)
{
int NO_OF_Column=0;XSSFCell cell = null;
XSSFSheet sheet=null;
try {
loadFile(); //load give Excel
if(validateIndex(SheetIndex))
{
sheet = workbook.getSheetAt(SheetIndex);
Iterator rowIter = sheet.rowIterator();
XSSFRow firstRow = (XSSFRow) rowIter.next();
Iterator cellIter = firstRow.cellIterator();
while(cellIter.hasNext())
{
cell = (XSSFCell) cellIter.next();
NO_OF_Column++;
}
}
else
throw new InvalidSheetIndexException("Invalid sheet index.");
} catch (Exception ex) {
logger.error(ex.getMessage());
}
return NO_OF_Column;
}
public int getNumberOfRows(int SheetIndex)
{
int NO_OF_ROW=0; XSSFSheet sheet=null;
try {
loadFile(); //load give Excel
if(validateIndex(SheetIndex))
{
sheet = workbook.getSheetAt(SheetIndex);
NO_OF_ROW = sheet.getLastRowNum();
}
else
throw new InvalidSheetIndexException("Invalid sheet index.");
} catch (Exception ex) {
logger.error(ex);}
return NO_OF_ROW;
}
public String[] getSheetHeader(int SheetIndex)
{
int noOfColumns = 0;XSSFCell cell = null; int i =0;
String columns[] = null; XSSFSheet sheet=null;
try {
loadFile(); //load give Excel
if(validateIndex(SheetIndex))
{
sheet = workbook.getSheetAt(SheetIndex);
noOfColumns = getNumberOfColumns(SheetIndex);
columns = new String[noOfColumns];
Iterator rowIter = sheet.rowIterator();
XSSFRow Row = (XSSFRow) rowIter.next();
Iterator cellIter = Row.cellIterator();
while(cellIter.hasNext())
{
cell = (XSSFCell) cellIter.next();
columns[i] = cell.getStringCellValue();
i++;
}
}
else
throw new InvalidSheetIndexException("Invalid sheet index.");
}
catch (Exception ex) {
logger.error(ex);}
return columns;
}//end of method
public String[][] getSheetData(int SheetIndex)
{
int noOfColumns = 0;XSSFRow row = null;
XSSFCell cell = null;
int i=0;int noOfRows=0;
int j=0;
String[][] data=null; XSSFSheet sheet=null;
try {
loadFile(); //load give Excel
if(validateIndex(SheetIndex))
{
sheet = workbook.getSheetAt(SheetIndex);
noOfColumns = getNumberOfColumns(SheetIndex);
noOfRows =getNumberOfRows(SheetIndex)+1;
data = new String[noOfRows][noOfColumns];
Iterator rowIter = sheet.rowIterator();
while(rowIter.hasNext())
{
row = (XSSFRow) rowIter.next();
Iterator cellIter = row.cellIterator();
j=0;
while(cellIter.hasNext())
{
cell = (XSSFCell) cellIter.next();
if(cell.getCellType() == cell.CELL_TYPE_STRING)
{
data[i][j] = cell.getStringCellValue();
}
else if(cell.getCellType() == cell.CELL_TYPE_NUMERIC)
{
if (HSSFDateUtil.isCellDateFormatted(cell))
{
String formatCellValue = new DataFormatter().formatCellValue(cell);
data[i][j] =formatCellValue;
}
else
{
data[i][j] = Double.toString(cell.getNumericCellValue());
}
}
else if(cell.getCellType() == cell.CELL_TYPE_BOOLEAN)
{
data[i][j] = Boolean.toString(cell.getBooleanCellValue());
}
else if(cell.getCellType() == cell.CELL_TYPE_FORMULA)
{
data[i][j] = cell.getCellFormula().toString();
}
j++;
}
i++;
} // outer while
}
else throw new InvalidSheetIndexException("Invalid sheet index.");
} catch (Exception ex) {
logger.error(ex);}
return data;
}
public String[][] getSheetData(int SheetIndex,int noOfRows)
{
int noOfColumns = 0;
XSSFRow row = null;
XSSFCell cell = null;
int i=0;
int j=0;
String[][] data=null;
XSSFSheet sheet=null;
try {
loadFile(); //load give Excel
if(validateIndex(SheetIndex))
{
sheet = workbook.getSheetAt(SheetIndex);
noOfColumns = getNumberOfColumns(SheetIndex);
data = new String[noOfRows][noOfColumns];
Iterator rowIter = sheet.rowIterator();
while(i<noOfRows)
{
row = (XSSFRow) rowIter.next();
Iterator cellIter = row.cellIterator();
j=0;
while(cellIter.hasNext())
{
cell = (XSSFCell) cellIter.next();
if(cell.getCellType() == cell.CELL_TYPE_STRING)
{
data[i][j] = cell.getStringCellValue();
}
else if(cell.getCellType() == cell.CELL_TYPE_NUMERIC)
{
if (HSSFDateUtil.isCellDateFormatted(cell))
{
String formatCellValue = new DataFormatter().formatCellValue(cell);
data[i][j] =formatCellValue;
}
else
{
data[i][j] = Double.toString(cell.getNumericCellValue());
}
}
j++;
}
i++;
} // outer while
}else throw new InvalidSheetIndexException("Invalid sheet index.");
} catch (Exception ex) {
logger.error(ex);
}
return data;
}
请帮我解决这个问题。
Thanks
该错误告诉您 POI 找不到 OOXML 文件的核心部分，在本例中为内容类型部分。您的文件不是有效的 OOXML 文件，更不用说有效的 .xlsx 文件了。不过，它是一个有效的 zip 文件，否则您会收到较早的错误
Excel 真的可以加载这个文件吗？我预计它不能，因为异常最常见的触发方式是为 POI 提供常规 .zip 文件！我怀疑您的文件无效，因此出现异常
.
Update:在 Apache POI 3.15（从 beta 1 开始）中，针对此问题的更常见原因提供了一组更有用的异常消息。在这种情况下，您现在将获得更多描述性异常，例如ODF NotOfficeXmlFileException http://poi.apache.org/apidocs/org/apache/poi/openxml4j/exceptions/ODFNotOfficeXmlFileException.html and OLE2NotOfficeXmlFileException http://poi.apache.org/apidocs/org/apache/poi/openxml4j/exceptions/OLE2NotOfficeXmlFileException.html。仅当 POI 确实不知道您提供的内容但知道它已损坏或无效时，才应显示此原始表单。
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