Apache POI无法打开.xlsm文件的工作簿的问题

Question

我一直在尝试使用Java程序生成Invoice语句，并且遇到了使用Apache POI处理存储正在访问的信息的.xlsm的问题。

Invoice.java

  import java.lang.*;
  import java.io.*;
  import java.util.*;
  import org.apache.poi.ss.usermodel.*;
  import org.apache.poi.xssf.usermodel.*;
  import org.apache.poi.*;

  public class Invoice {
     String _file = "vendors.xlsm";
     int vs = 0;
     int ps = 0;

     public Invoice(String file, int vendSheet, int paySheet) {
        _file = file;
        vs = vendSheet;
        ps = paySheet;
     }

     public Invoice() {

     }

     public void getVendors() {
        //String[][] vendors = new string[][]; commented out for testing purposes
        try {
           FileInputStream fis = new FileInputStream(new File(_file));
           Workbook wb = new XSSFWorkbook(fis);
           Sheet sheet = wb.getSheetAt(0);
           Iterator<Row> iRow = sheet.iterator();

           // Reading something finally (rows from the vendor sheet)
           while(iRow.hasNext()) {
              Row currRow = iRow.next();
              Iterator<Cell> iCell = currRow.iterator();

              // comparing cell types here
              while(iCell.hasNext()) {
                 Cell currCell = iCell.next();
                 if(currCell.getCellType() == CellType.STRING) {
                    System.out.print(currCell.getStringCellValue() + "--");
                 }
                 else if(currCell.getCellType() == CellType.NUMERIC) {
                    System.out.print(currCell.getNumericCellValue() + "--");
                 }
              }
              System.out.println();
           }
        }
        catch (FileNotFoundException fnfe) {
           fnfe.printStackTrace();
        }
        catch (IOException ioe) {
           ioe.printStackTrace();
        }
        catch (Exception e) {
           e.printStackTrace();
        }
     }
  }

我遇到的问题发生在Workbook wb = new XSSFWorkbook(fis);

我得到以下错误输出：

java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
    at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
 Caused by: java.lang.NoClassDefFoundError: org/apache/xmlbeans/XmlObject
    at Invoice.getVendors(Invoice.java:37)
    at InvoiceBuilder.main(InvoiceBuilder.java:32)
    ... 11 more
 Caused by: java.lang.ClassNotFoundException: org.apache.xmlbeans.XmlObject
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 13 more
 Exception running application InvoiceBuilder

它总是指向那一行。我不太确定从这里去哪里，我还找不到解决方案。

如果文件路径看起来不正确，那是因为我删节了文件路径，以免我的名字出名。