我需要打开excel文件。然后我需要检查日期(2014年12月31日)。如果文件中存在这个,那么我需要替换为11/28/2014。实际上excel文件包含日期。但是在我的代码中永远不会传递这个条件if (df.format(DateUtil.getJavaDate(cell.getNumericCellValue())).equals(df.format(asOfDate))) {
。
package excelAsOfDate;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelAsOfDate {
public static void main(String[] args) {
try {
DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
Date asOfDate = df.parse("12/31/2014");
Date newAsOfDate = df.parse("11/28/2014");
System.out.println("date as of" + df.format(asOfDate));
File directory = new File("C://Users//kondeti.venkatarao//Documents//Regresion_sheets//test");
File[] files = directory.listFiles();
for (File file : files) {
if (file.getName().toLowerCase().endsWith(".xlsx")) {
FileInputStream fis = new FileInputStream(file.getAbsoluteFile());
// Create Workbook instance holding reference to .xlsx file
XSSFWorkbook workbook = new XSSFWorkbook(fis);
int i = 1;
while (i < workbook.getNumberOfSheets()) {
// Get first/desired sheet from the workbook
XSSFSheet sheet = workbook.getSheetAt(i);
// Iterate through each rows one by one
Iterator<Row> rowIterator = sheet.iterator();
while (rowIterator.hasNext()) {
Row row = rowIterator.next();
// For each row, iterate through all the columns
Iterator<Cell> cellIterator = row.cellIterator();
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
// Check the cell type and format accordingly
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
if (df.format(DateUtil.getJavaDate(cell.getNumericCellValue())).equals(df.format(asOfDate))) {
// System.out.println(df.format(cell.getDateCellValue()));
System.out.println(df.format(DateUtil.getJavaDate(cell.getNumericCellValue())));
CreationHelper createHelper = workbook.getCreationHelper();
CellStyle cellStyle = workbook.createCellStyle();
cellStyle.setFillForegroundColor(IndexedColors.RED.getIndex());
cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
cellStyle.setDataFormat(createHelper.createDataFormat().getFormat("m/d/yy"));
cell.setCellValue(newAsOfDate);
cell.setCellStyle(cellStyle);
}
}
break;
}
}
}
i++;
fis.close();
}
//FileOutputStream fileOut = new FileOutputStream("C://Users//kondeti.venkatarao//Documents//Regresion_sheets//test//final//"+file.getName());
FileOutputStream fileOut = new FileOutputStream(file.getAbsoluteFile());
workbook.write(fileOut);
fileOut.close();
fis.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
答案 0 :(得分:1)
记录是找到答案的关键。
当我查看Cell类时,我发现有一个名为:
的方法当我们看看那个的设定者时:
void setCellValue(java.util.Date value)
将提供的日期转换为其等效的Excel数值,并将其设置为单元格。
所以你没有比较正确 我的快速建议是:
if (df.format(cell.getDateCellValue()).equals(df.format(asOfDate)))
如果这不起作用,请将df.format(cell.getDateCellValue()
生成的内容记录为String
。
编辑:
您是否也注意到了这一点:
DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
Date asOfDate = df.parse("12/31/2014");
您的第二个日期是MM/dd/yyyy