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java apache.poi_Java Apache POI

發布時間：2023/12/10 java 34 豆豆

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我正在努力從excel文檔中讀取數據,該文檔每兩周更新一次,大約有50,000行數據,在開始新工作表之前可能會達到大約120,000.我正在使用Apache POI來獲取數據.我在下面得到了這個例外,但我認為最重要的一個例外是

引起：

java.lang.OutOfMemoryError：

Java堆空間.我已經在不同的excel表上測試了我的代碼,數據量更少,并且能夠讀取數據.

如果您對如何閱讀大型Excel文檔有任何方法或建議,請分享.

org.apache.poi.POIXMLException: java.lang.reflect.InvocationTargetException

at org.apache.poi.xssf.usermodel.XSSFFactory.createDocumentPart(XSSFFactory.java:62)

at org.apache.poi.POIXMLDocumentPart.read(POIXMLDocumentPart.java:456)

at org.apache.poi.POIXMLDocumentPart.read(POIXMLDocumentPart.java:461)

at org.apache.poi.POIXMLDocument.load(POIXMLDocument.java:162)

at org.apache.poi.xssf.usermodel.XSSFWorkbook.(XSSFWorkbook.java:271)

at excelreader.readExcelFile(excelreader.java:28)

at excelreader.main(excelreader.java:18)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:497)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

Caused by: java.lang.reflect.InvocationTargetException

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:422)

at org.apache.poi.xssf.usermodel.XSSFFactory.createDocumentPart(XSSFFactory.java:60)

... 13 more

Caused by: java.lang.OutOfMemoryError: Java heap space

at org.apache.xmlbeans.impl.store.Cur.createElementXobj(Cur.java:260)

at org.apache.xmlbeans.impl.store.Cur$CurLoadContext.startElement(Cur.java:2995)

at org.apache.xmlbeans.impl.store.Locale$SaxHandler.startElement(Locale.java:3207)

at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.reportStartTag(Piccolo.java:1082)

at org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.parseAttributesNS(PiccoloLexer.java:1822)

at org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.parseOpenTagNS(PiccoloLexer.java:1521)

at org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.parseTagNS(PiccoloLexer.java:1362)

at org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.yylex(PiccoloLexer.java:4678)

at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.yylex(Piccolo.java:1290)

at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.yyparse(Piccolo.java:1400)

at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.parse(Piccolo.java:714)

at org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3454)

at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1276)

at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1263)

at org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345)

at org.openxmlformats.schemas.spreadsheetml.x2006.main.CTPivotCacheRecords$Factory.parse(Unknown Source)

at org.apache.poi.xssf.usermodel.XSSFPivotCacheRecords.readFrom(XSSFPivotCacheRecords.java:62)

at org.apache.poi.xssf.usermodel.XSSFPivotCacheRecords.(XSSFPivotCacheRecords.java:53)