[英]Apache POI reads wrong date format of Excel sheet by the XSSF reader
我想读取Excel工作表中单元格的特定值。当前我的代码给出的是常规值而不是单元格的自定义值。
举个例子:-现在,
由于工作簿的内存问题,我们正在使用XSSF阅读器,XMLReader和现在的工作簿。 (我们在we for workbook上看到了很多答案,而不是XSSF)
测试用例
请注意,所有输入模式都带有连字符(-)和斜杠(/)。
强文本这是代码---->
import java.io.InputStream;
import java.util.Iterator;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.xssf.eventusermodel.XSSFReader;
import org.apache.poi.xssf.model.SharedStringsTable;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLReaderFactory;
public class DateCellDemo {
public void processOneSheet(String filename) throws Exception {
OPCPackage pkg = OPCPackage.open(filename);
XSSFReader r = new XSSFReader( pkg );
SharedStringsTable sst = r.getSharedStringsTable();
XMLReader parser = fetchSheetParser(sst);
InputStream sheet2 = r.getSheet("rId1");
InputSource sheetSource = new InputSource(sheet2);
parser.parse(sheetSource);
sheet2.close();
}
public void processAllSheets(String filename) throws Exception {
OPCPackage pkg = OPCPackage.open(filename);
XSSFReader r = new XSSFReader( pkg );
SharedStringsTable sst = r.getSharedStringsTable();
XMLReader parser = fetchSheetParser(sst);
Iterator<InputStream> sheets = r.getSheetsData();
while(sheets.hasNext()) {
System.out.println("Processing new sheet:\n");
InputStream sheet = sheets.next();
InputSource sheetSource = new InputSource(sheet);
parser.parse(sheetSource);
sheet.close();
System.out.println("");
}
}
public XMLReader fetchSheetParser(SharedStringsTable sst) throws SAXException {
XMLReader parser =
XMLReaderFactory.createXMLReader(
"org.apache.xerces.parsers.SAXParser"
);
ContentHandler handler = new SheetHandler(sst);
parser.setContentHandler(handler);
return parser;
}
private static class SheetHandler extends DefaultHandler {
private SharedStringsTable sst;
private String lastContents;
private boolean nextIsString;
private SheetHandler(SharedStringsTable sst) {
this.sst = sst;
}
public void startElement(String uri, String localName, String name,
Attributes attributes) throws SAXException {
// c => cell
if(name.equals("c")) {
// Print the cell reference
System.out.print(attributes.getValue("r") + " - ");
// Figure out if the value is an index in the SST
String cellType = attributes.getValue("t");
//System.out.println("------ cellType :"+cellType);
if(cellType != null && cellType.equals("s")) {
nextIsString = true;
} else {
nextIsString = false;
}
}
// Clear contents cache
lastContents = "";
}
public void endElement(String uri, String localName, String name)
throws SAXException {
// Process the last contents as required.
// Do now, as characters() may be called more than once
if(nextIsString) {
System.out.println("Date Pattren : "+nextIsString);
int idx = Integer.parseInt(lastContents);
lastContents = new XSSFRichTextString(sst.getEntryAt(idx)).toString();
}
// v => contents of a cell
// Output after we've seen the string contents
if(name.equals("v")) {
System.out.println("Last_Content : "+lastContents);
}
}
public void characters(char[] ch, int start, int length)
throws SAXException {
lastContents += new String(ch, start, length);
}
}
public static void main(String[] args) {
try {
DateCellDemo howto = new DateCellDemo();
howto.processOneSheet("C:\\Users\\Dell\\Downloads\\Source11_Data.xlsx");
} catch (Exception e) {
e.printStackTrace();
}
}
}
还有另一个Apache POI示例(XLSX2CSV),使您可以流式处理输入xlsx,但可以访问格式化的单元格数据。 您的代码基于另一个示例,该示例从xlsx文件读取原始XML(原始XML具有数字格式的日期)。
这基于该示例: https : //github.com/pjfanning/poi-shared-strings-sample/blob/master/src/main/java/com/github/pjfanning/poi/sample/XLSX2CSV.java
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.