java.lang.ClassNotFoundException: org.apache.xmlbeans.XmlOptions

Question

I am trying to use POI in a servlet to process an uploaded file as Excel file:

public static String readExcel(InputStream inp) {
    // InputStream inp = null;
    StringBuilder excelDataBuilder = new StringBuilder();
    try {
        Workbook wb = WorkbookFactory.create(inp);
        Sheet sheet = wb.getSheetAt(0);
        Header header = sheet.getHeader();

        int rowsCount = sheet.getLastRowNum();
        for (int rowCounter = 0; rowCounter <= rowsCount; rowCounter++) {
            Row row = sheet.getRow(rowCounter);
            int colCounts = row.getLastCellNum();
            for (int colCounter = 0; colCounter < colCounts; colCounter++) {
                Cell cell = row.getCell(colCounter);
                excelDataBuilder.append(cell.getStringCellValue());
                if (colCounter < colCounts)
                    excelDataBuilder.append(",");
            }
            if (rowCounter <= rowsCount) {
                excelDataBuilder.append("\n");
            }
        }
        return excelDataBuilder.toString();

    } catch (Exception ex) {
        LOG.error("Exception", ex);
    } finally {
        try {
            inp.close();
        } catch (IOException ex) {
            LOG.error("IOException", ex);
        }
    }
    return excelDataBuilder.toString();
}

However, it threw an exception at the following line:

Workbook wb = WorkbookFactory.create(inp);

Here's the Stack Trace:

SEVERE: Servlet.service() for servlet [com.bhrt93.excel.servlet.UploadProcessExcel] in context with path [/ExcelServletProcessCommons] threw exception [Servlet execution threw an exception] with root cause
java.lang.ClassNotFoundException: org.apache.xmlbeans.XmlOptions
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    at org.apache.poi.POIXMLDocumentPart.<clinit>(POIXMLDocumentPart.java:59)
    at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:78)
    at com.bhrt93.excel.service.ExcelReaderService.readExcel(ExcelReaderService.java:22)
    at com.bhrt93.excel.servlet.UploadProcessExcel.doPost(UploadProcessExcel.java:69)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)

How is this caused and how can I solve it?

Answer 1

As detailed in the Apache POI page on Components and their Dependencies ...

If you want to use Common SS code, such as WorkbookFactory, you need both the poi and poi-ooxml POI jars on your classpath. In addition, you also need their dependencies too. One of the listed dependencies is xmlbeans , which incidentally is where your missing class comes from

So, you just need to review the Components and Dependencies page , then make sure you include the appropriate jars from the binary package of Apache POI on your classpath. (Or use Maven and let it worry about that for you)

Answer 2

如此处所示 ，您必须添加（至少在我的情况下就是这样）： xmlbeans-2.6.0.jar

Answer 3

System couldn't find the XML beans dependency on your classpath so you should add the XML beans dependency to your class path.

The XML beans library looks like xmlbeans-xxxjar

https://mvnrepository.com/artifact/org.apache.xmlbeans/xmlbeans