我有13个.xlsx文件,每个文件大约有1000行。现在我想将它们合并为一个包含一个表格的.xlsx文件。我正在使用这里的代码 https://blog.sodhanalibrary.com/2014/11/merge-excel-files-using-java.html#.Vi9ns36rSUk。 这是我的代码(稍作更改,addSheet方法未更改)
try {
FileInputStream excellFile1 = new FileInputStream(new File("tmp_testOut1000.xlsx"));
XSSFWorkbook workbook1 = new XSSFWorkbook(excellFile1);
XSSFSheet sheet1 = workbook1.getSheetAt(0);
for(int i = 2; i < 14; i++){
FileInputStream excellFile2 = new FileInputStream(new File("tmp_testOut" + i + "000.xlsx"));
XSSFWorkbook workbook2 = new XSSFWorkbook(excellFile2);
XSSFSheet sheet2 = workbook2.getSheetAt(0);
System.out.println("add " + i);
addSheet(sheet1, sheet2);
}
excellFile1.close();
// save merged file
System.out.println("merging");
File mergedFile = new File("merged.xlsx");
if (!mergedFile.exists()) {
mergedFile.createNewFile();
}
FileOutputStream out = new FileOutputStream(mergedFile);
System.out.println("write");
workbook1.write(out);
out.close();
System.out.println("Files were merged succussfully");
} catch (Exception e) {
e.printStackTrace();
}
所有文件都在加载和合并,但是在执行“write” sysout之后出现了以下问题:
Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded
at org.apache.xmlbeans.impl.store.Xobj.new_cursor(Xobj.java:1829)
at org.apache.xmlbeans.impl.values.XmlObjectBase.newCursor(XmlObjectBase.java:293)
at org.apache.xmlbeans.impl.values.XmlComplexContentImpl.arraySetterHelper(XmlComplexContentImpl.java:1151)
at org.openxmlformats.schemas.spreadsheetml.x2006.main.impl.CTFontsImpl.setFontArray(Unknown Source)
at org.apache.poi.xssf.model.StylesTable.writeTo(StylesTable.java:424)
at org.apache.poi.xssf.model.StylesTable.commit(StylesTable.java:496)
at org.apache.poi.POIXMLDocumentPart.onSave(POIXMLDocumentPart.java:341)
at org.apache.poi.POIXMLDocumentPart.onSave(POIXMLDocumentPart.java:345)
at org.apache.poi.POIXMLDocument.write(POIXMLDocument.java:206)
at Start.main(Start.java:275)
我能做些什么?为什么会发生这种情况,如何预防?