仅当使用的Excel不是英语时,才会出现此问题.那么该公式实际上不是例如= TEXT(A2,“ yyyy-MM-dd”),而是例如在我的德语Excel中为= TEXT(A2,“ JJJJ-MM-TT”).
如您所见,尽管所有其他公式部分始终都是en_US语言环境,但TEXT函数中的format部分将始终与语言环境相关.这是因为格式部分位于公式内的字符串中,不会更改.因此,德语为= TEXT(A2,“ JJJJ-MM-TT”)(年份= Jahr,Day =标记),法语为= TEXT(A2,“ AAAA-MM-JJ”)(年份=Année,Day = Jour).
而且由于apache poi的FormulaEvaluator到目前为止还没有语言环境设置,因此该公式无法正确评估.
然后,我们有两种可能性.
首先,我们希望存储的单元格值应该是所需的字符串.因此,如果单元格公式以“ TEXT”开头并且包含“ JJJJ-MM-TT”,则不要进行评估,因为这样做不合适.而是从Excel的上一次评估中获取字符串单元格值.
其次,我们可以在公式中用en_US替换语言环境相关的格式部分,然后让apache poi求值.至少如果我们只想读取而不是重写Excel文件,则不会破坏Excel文件中的内容.
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.util.*;
import org.apache.poi.ss.formula.eval.ErrorEval;
import java.io.FileInputStream;
class ReadExcelExample {
private static String getString(Cell cell,FormulaEvaluator evaluator) {
if (cell == null) return "null";
String text = "";
switch (cell.getCellType()) {
//switch (cell.getCellTypeEnum()) {
case STRING:
text = cell.getRichStringCellValue().getString();
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
text = String.valueOf(cell.getDateCellValue());
} else {
text = String.valueOf(cell.getNumericCellValue());
}
break;
case BOOLEAN:
text = String.valueOf(cell.getBooleanCellValue());
break;
case FORMULA:
text = cell.getCellFormula();
//if formula is TEXT(...,"JJJJ-MM-TT") then do not evaluating:
if (cell.getCellFormula().startsWith("TEXT") && cell.getCellFormula().contains("JJJJ-MM-TT")) {
text = text + ": value got from cell = " + cell.getRichStringCellValue().getString();
} else {
CellValue cellValue = evaluator.evaluate(cell);
switch (cellValue.getCellType()) {
//switch (cellValue.getCellTypeEnum()) {
case STRING:
text = text + ": " + cellValue.getStringValue();
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
text = text + ": " + String.valueOf(DateUtil.getJavaDate(cellValue.getNumberValue()));
} else {
text = text + ": " + String.valueOf(cellValue.getNumberValue());
}
break;
case BOOLEAN:
text = text + ": " + String.valueOf(cellValue.getBooleanValue());
break;
case ERROR:
throw new RuntimeException("from CellValue: " + ErrorEval.getText(cellValue.getErrorValue()));
default:
throw new RuntimeException("unexpected cellValue type " + cellValue.getCellType());
}
}
break;
case ERROR:
throw new RuntimeException("from Cell: " + ErrorEval.getText(cell.getErrorCellValue()));
case BLANK:
text = "";
break;
default:
throw new RuntimeException("unexpected cell type " + cell.getCellType());
}
return text;
}
public static void main(String[] args) throws Exception {
//Workbook wb = WorkbookFactory.create(new FileInputStream("SAMPLE.xls"));
Workbook wb = WorkbookFactory.create(new FileInputStream("SAMPLE.xlsx"));
DataFormatter formatter = new DataFormatter(new java.util.Locale("en","US"));
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
Sheet sheet = wb.getSheetAt(0);
for (Row row : sheet) {
for (Cell cell : row) {
CellReference cellRef = new CellReference(row.getRowNum(),cell.getColumnIndex());
System.out.print(cellRef.formatAsString());
System.out.print(" - ");
String text = "";
try {
text = getString(cell,evaluator);
} catch (Exception ex) {
text = ex.toString();
}
System.out.println(text);
}
}
wb.close();
}
}
德文Excel：
结果：
A1 - Value
B1 - Formula
A2 - Fri Jan 11 00:00:00 CET 2019
B2 - TEXT(A2,"JJJJ-MM-TT"): value got from cell = 2019-01-11
A3 - 123.45
B3 - A3*2: 246.9
B4 - java.lang.RuntimeException: from CellValue: #DIV/0!
B5 - TODAY(): Fri Jan 11 00:00:00 CET 2019
B6 - B5=A2: true
A7 - java.lang.RuntimeException: from CellValue: #N/A
B8 - TEXT(TODAY(),"JJJJ-MM-TT"): value got from cell = 2019-01-11
英文Calc：
结果：
A1 - Value
B1 - Formula
A2 - Fri Jan 11 00:00:00 CET 2019
B2 - TEXT(A2,"yyyy-MM-dd"): 2019-01-11
A3 - 123.45
B3 - A3*2: 246.9
B4 - java.lang.RuntimeException: from CellValue: #DIV/0!
B5 - TODAY(): Fri Jan 11 00:00:00 CET 2019
B6 - B5=A2: true
A7 - java.lang.RuntimeException: from CellValue: #N/A
B8 - TEXT(TODAY(),"yyyy-MM-dd"): 2019-01-11
代码第二种方法(将与语言环境相关的格式部分替换为en_US一种)：
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.util.*;
import java.io.FileInputStream;
import java.util.Locale;
class ExcelEvaluateTEXTDiffLocales {
private static String getString(Cell cell,DataFormatter formatter,FormulaEvaluator evaluator,Locale locale) {
String text = "";
if (cell.getCellType() == CellType.FORMULA) {
String cellFormula = cell.getCellFormula();
text += cellFormula + ":= ";
if (cellFormula.startsWith("TEXT")) {
int startFormatPart = cellFormula.indexOf('"');
int endFormatPart = cellFormula.lastIndexOf('"') + 1;
String formatPartOld = cellFormula.substring(startFormatPart,endFormatPart);
String formatPartNew = formatPartOld;
if ("de".equals(locale.getLanguage())) {
formatPartNew = formatPartNew.replace("T","D"); // Tag = Day
// Monat = Month
formatPartNew = formatPartNew.replace("J","Y"); // Jahr = Year
//...
} else if ("fr".equals(locale.getLanguage())) {
formatPartNew = formatPartNew.replace("J","D"); // Jour = Day
// Mois = Month
formatPartNew = formatPartNew.replace("A","Y"); // Année = Year
//...
} //...
cellFormula = cellFormula.replace(formatPartOld,formatPartNew);
cell.setCellFormula(cellFormula);
}
}
try {
text += formatter.formatCellValue(cell,evaluator);
} catch (org.apache.poi.ss.formula.eval.NotImplementedException ex) {
text += ex.toString();
}
return text;
}
public static void main(String[] args) throws Exception {
//Workbook wb = WorkbookFactory.create(new FileInputStream("SAMPLE.xls"));
Workbook wb = WorkbookFactory.create(new FileInputStream("SAMPLE.xlsx"));
Locale locale = new Locale("fr","CH");
DataFormatter formatter = new DataFormatter(locale);
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
Sheet sheet = wb.getSheetAt(0);
for (Row row : sheet) {
for (Cell cell : row) {
CellReference cellRef = new CellReference(row.getRowNum(),cell.getColumnIndex());
System.out.print(cellRef.formatAsString());
System.out.print(" - ");
String text = "";
text = getString(cell,formatter,evaluator,locale);
System.out.println(text);
}
}
wb.close();
}
}
法语Calc：
结果：
A1 - Value
B1 - Formula
A2 - 1/11/2019
B2 - TEXT(A2,"AAAA-MM-JJ"):= 2019-01-11
A3 - 123.45
B3 - A3*2:= 246.9
B4 - 1/A4:= #DIV/0!
B5 - TODAY():= 1/12/2019
B6 - B5=A2:= FALSE
A7 - NA():= #N/A
B8 - TEXT(TODAY(),"AAAA-MM-JJ"):= 2019-01-12
提示：这里使用的apache poi版本是4.0.1.较低的版本可能会有进一步的评估问题.