如何使用Java更新Excel元数据

Question

我正在尝试使用apache POI更新Java中的excel元数据。 输入文件很大，包含8K列和600行。 我正在使用下面的代码

    OPCPackage pkg = OPCPackage.open(new File("path for input"));
    POIXMLProperties props = new POIXMLProperties(pkg);
    props.getCoreProperties().setTitle("Test Title");

    XSSFWorkbook wb = new XSSFWorkbook(pkg);
    FileOutputStream fos = new FileOutputStream("path for output");
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    wb.write(bos);
    fos.close();

上面的代码将我抛出内存不足异常，如下所示。

java.lang.OutOfMemoryError: Java heap space
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3414)
at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1272)
at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1259)
at org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345)
at org.openxmlformats.schemas.spreadsheetml.x2006.main.WorksheetDocument$Factory.parse(Unknown Source)
at org.apache.poi.xssf.usermodel.XSSFSheet.read(XSSFSheet.java:227)
at org.apache.poi.xssf.usermodel.XSSFSheet.onDocumentRead(XSSFSheet.java:219)
at org.apache.poi.xssf.usermodel.XSSFWorkbook.parseSheet(XSSFWorkbook.java:452)
at org.apache.poi.xssf.usermodel.XSSFWorkbook.onDocumentRead(XSSFWorkbook.java:417)
at org.apache.poi.ooxml.POIXMLDocument.load(POIXMLDocument.java:184)
at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:286)

您能否帮助克服此问题以更新excel属性？

Answer 1

促进评论的答案...。

如果您只是更改OPC级别的元数据，则无需随时在XSSF层中加载文件。 仅当您还想更改电子表格内容（例如单元格）时，才需要这样做

您的代码可以很简单

OPCPackage pkg = OPCPackage.open(new File("path for input"));
POIXMLProperties props = new POIXMLProperties(pkg);
props.getCoreProperties().setTitle("Test Title");
props.commit();
pkg.close();