如何通过apache POI上传xlsx文件时修复AbstractMethodError

Question

我一直在努力使上传（在一个旧的Web应用程序中）兼容xls和xlsx文件，xls运行正常，但上传xlsx会引发此错误：

SEVERE: Servlet.service() for servlet [MainServlet] in context with path [/timesheet] threw exception [Servlet execution threw an exception] with root cause
java.lang.AbstractMethodError: org.apache.crimson.tree.ElementNode2.getTextContent()Ljava/lang/String;
    at org.apache.poi.openxml4j.opc.internal.unmarshallers.PackagePropertiesUnmarshaller.readElement(PackagePropertiesUnmarshaller.java:146)
    at org.apache.poi.openxml4j.opc.internal.unmarshallers.PackagePropertiesUnmarshaller.loadCreated(PackagePropertiesUnmarshaller.java:162)
    at org.apache.poi.openxml4j.opc.internal.unmarshallers.PackagePropertiesUnmarshaller.unmarshall(PackagePropertiesUnmarshaller.java:124)
    at org.apache.poi.openxml4j.opc.OPCPackage.getParts(OPCPackage.java:788)
    at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:327)
    at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:185)
    at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:144)

目前的poi lib版本是3.14，但我也试过3.16（同样的错误）和3.17，该应用程序目前正在使用Java 1.6

public List<AttendanceRecord> getAttendanceRecords(List<AttendanceRecordErrMsg> errorMessages) throws Exception {

        Workbook wb = WorkbookFactory.create(new FileInputStream(arFile)); //app already throws an error upon reaching this line

        List<AttendanceRecord> attendanceRecordList = new ArrayList<AttendanceRecord>();

Answer 1

出现这种错误的原因是因为Crimson Library包含在你的项目中，它只在Node接口上提供实现（基于最新版本1.1.3的xml-apis 1.0.b2），并且没有实现根据引入的getTextContent()方法。 Document Object Model (DOM) Level 3 Core Specification。

要修复此类错误，您可以执行以下操作之一：

1.从您的项目中删除Crimson Library。

2.指定javax.xml.parsers.DocumentBuilderFactory系统属性以避免使用org.apache.crimson.jaxp.DocumentBuilderFactoryImpl类添加以下行 System.setProperty("javax.xml.parsers.DocumentBuilderFactory","com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl");