我正在使用 Apache POI 3.8 库来读取 Web 应用程序中的 XLSX 文件。以下代码在 Java 控制台应用程序中运行良好:
InputStream inputFS = new FileInputStream("test.xlsx");
Workbook workbook = new XSSFWorkbook(inputFS); // below exception is thrown on this line
Sheet sheet = workbook.getSheetAt(0);
但在 Web 应用程序中使用时会引发“读取错误”。堆栈跟踪的相关摘录粘贴在下面:
java.io.IOException: Read error
at java.io.FileInputStream.readBytes(Native Method) ~[na:1.6.0_31]
at java.io.FileInputStream.read(Unknown Source) ~[na:1.6.0_31]
at java.io.FilterInputStream.read(Unknown Source) ~[na:1.6.0_31]
at java.io.PushbackInputStream.read(Unknown Source) ~[na:1.6.0_31]
at java.util.zip.ZipInputStream.readFully(Unknown Source) ~[na:1.6.0_31]
at java.util.zip.ZipInputStream.readLOC(Unknown Source) ~[na:1.6.0_31]
at java.util.zip.ZipInputStream.getNextEntry(Unknown Source) ~[na:1.6.0_31]
at org.apache.poi.openxml4j.util.ZipInputStreamZipEntrySource.<init>(ZipInputStreamZipEntrySource.java:51) ~[poi-ooxml-3.8-20120326.jar:3.8]
at org.apache.poi.openxml4j.opc.ZipPackage.<init>(ZipPackage.java:83) ~[poi-ooxml-3.8-20120326.jar:3.8]
at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:228) ~[poi-ooxml-3.8-20120326.jar:3.8]
at org.apache.poi.util.PackageHelper.open(PackageHelper.java:39) ~[poi-ooxml-3.8-20120326.jar:3.8]
at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:187) ~[poi-ooxml-3.8-20120326.jar:3.8]
at com.corp.ReportManager.parseExcelReport(ReportManager.java:575) [ReportManager.class:na]
类路径中包含以下 JAR(以相同的顺序):
poi-3.8-20120326.jar
poi-ooxml-3.8-20120326.jar
poi-ooxml-schemas-3.8-20120326.jar
xbean.jar
dom4j-1.6.1.jar
似乎没有与内存相关的问题,因为我在调用上述代码之前收集了一些堆利用率统计信息。XLSX 文件大小为 1.15 MB。
##### Heap utilization statistics [MB] #####
Used Memory:13 MB
Free Memory:9 MB
Total Memory:23 MB
Max Memory:247 MB