我正在尝试在 servlet 中使用 POI 将上传的文件处理为 Excel 文件:
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();
}
但是，它在以下行引发了异常:
Workbook wb = WorkbookFactory.create(inp);
这是堆栈跟踪:
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)
这是怎么造成的，如何解决？
最佳答案
如 Apache POI page on Components and their Dependencies 中详述...
如果您想使用通用 SS 代码，例如 WorkbookFactory，则您的类路径中需要有 poi 和 poi-ooxml POI jar。此外，您还需要它们的依赖项。 listed dependencies之一是 xmlbeans，顺便说一句，它是您丢失的类的来源
所以，你只需要review the Components and Dependencies page ，然后确保在类路径上包含 Apache POI 二进制包中的适当 jar。 (或者使用 Maven，让它为你担心)
关于java.lang.ClassNotFoundException : org. apache.xmlbeans.XmlOptions，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26024193/