需要从 xlsx 文件访问数据

Question

public class fileReader {    public static void main (String[] args) throws IOException {        String excelFilePath = "sample.xlsx";        InputStream inputStream = new FileInputStream(new File(excelFilePath));        XSSFWorkbook workbook = new XSSFWorkbook();        Sheet firstSheet = workbook.getSheetAt(0);        Iterator<Row> iterator = firstSheet.iterator();        while (iterator.hasNext()) {            Row nextRow = iterator.next();            Iterator<Cell> cellIterator = nextRow.cellIterator();        ...在 XSSFWorkbook 行中显示了错误Exception in thread "main" org.apache.poi.ooxml.POIXMLException: org.apache.xmlbeans.XmlOptions.setEntityExpansionLimit(I)Lorg/apache/xmlbeans/XmlOptions;    at org.apache.poi.ooxml.POIXMLFactory.createDocumentPart(POIXMLFactory.java:66)    at org.apache.poi.ooxml.POIXMLDocumentPart.read(POIXMLDocumentPart.java:657)    at org.apache.poi.ooxml.POIXMLDocument.load(POIXMLDocument.java:180)    at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:282)    at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:303)    at fileReader.main(fileReader.java:20)

Answer 1

你没有阅读你的文件。您正在创建一个新工作簿。所以我怀疑你有一个例外，因为你要求一个Sheet没有的地方。

将您的文件提供给实例使用XSSFWorkbook(File)

String excelFilePath = "sample.xlsx";

File f = new File(excelFilePath);

XSSFWorkbook workbook = new XSSFWorkbook(f);

或者XSSFWorkbook(InputStream)

String excelFilePath = "sample.xlsx";

File f = new File(excelFilePath);

InputStream inputStream = new FileInputStream(f);

XSSFWorkbook workbook = new XSSFWorkbook(inputStream);

如果将 File 提供给工作簿实例，则会出现错误，显示 File cannot be resolved to a type

只需要导入java.io.File