编译失败，并显示以下错误：
cannot find symbol
case FORMULA:
symbol: variable FORMULA
接下来的情况下也会发生相同的错误。
我正在将Apache POI 4.0.0与Java 8结合使用。
我的代码是：
try (Workbook wb = WorkbookFactory.create(inputStream)) {
Sheet sheet = wb.getSheetAt(0);
for (Row row : sheet) {
for (Cell cell : row) {
switch (cell.getCellType()) {
case FORMULA:
[code]
break;
}
}
}
}
注1：从NetBeans 8.2部署到本地GlassFish 4.1.2可行，但是构建失败。
注2：如果将“ getCellTypeEnum”替换为“ getCellTypeEnum”（已弃用），则构建完成而没有错误。
版本：
package fr.mycompany.config.files;
import fr.mycompany.config.exception.MyAppException;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import javax.faces.application.FacesMessage;
import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.usermodel.CellType;
public class POIUtils {
public static List<List<String>> parseExcelFile(InputStream is) throws MyAppException {
List<List<String>> lines = new ArrayList<>();
try (Workbook wb = WorkbookFactory.create(is)) {
Sheet sheet = wb.getSheetAt(0);
DataFormatter df = new DataFormatter(true);
int numRow = 0;
for (Row row : sheet) {
int numCol = 0;
List<String> currentLine = new ArrayList<>();
for (Cell cell : row) {
switch (cell.getCellType()) {
case FORMULA:
currentLine.add(numCol, "");
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
LocalDate ld = cell.getDateCellValue().toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
String frLocalDate = ld.format(DateTimeFormatter.ofPattern("dd/MM/yyyy", Locale.FRANCE));
currentLine.add(numCol, frLocalDate);
} else {
String cellValue = df.formatCellValue(cell);
currentLine.add(numCol, cellValue);
}
break;
default:
String cellValue = df.formatCellValue(cell);
currentLine.add(numCol, cellValue);
break;
}
numCol++;
}
while (row.getRowNum() > numRow) {
lines.add(new ArrayList<>());
numRow++;
}
lines.add(row.getRowNum(), currentLine);
numRow++;
}
if (lines.isEmpty()) {
throw new MyAppException(FacesMessage.SEVERITY_WARN, "Le fichier est vide.");
}
} catch (IOException ex) {
throw new MyAppException(FacesMessage.SEVERITY_FATAL, "Une erreur est survenue lors du traitement du fichier.", ex);
} catch (EncryptedDocumentException ex) {
throw new MyAppException(FacesMessage.SEVERITY_FATAL, "Le fichier est protégé par un mot de passe et n'a pas pu être lu.", ex);
}
return lines;
}
}
package fr.mycompany.coordination;
import fr.mycompany.config.exception.MyAppException;
import fr.mycompany.config.files.POIUtils;
import java.io.Serializable;
import java.io.IOException;
import javax.faces.application.FacesMessage;
import javax.inject.Named;
import javax.faces.view.ViewScoped;
import java.util.List;
import java.util.ArrayList;
import org.apache.poi.poifs.filesystem.FileMagic;
import org.primefaces.event.FileUploadEvent;
import org.primefaces.event.UploadedFile;
@Named
@ViewScoped
public class FileImportBean implements Serializable {
private transient UploadedFile file;
private List<List<String>> parsedContent = new ArrayList<>();
public void handleFileUpload (FileUploadEvent event) {
try {
file = event.getFile();
if (null != file) {
switch (FileMagic.valueOf(FileMagic.prepareToCheckMagic(file.getInputstream()))) {
case OOXML:
parsedContent = POIUtils.parseExcelFile(file.getInputstream());
break;
default:
(new MyAppException(FacesMessage.SEVERITY_ERROR, "Type de fichier non géré.", ex)).doFacesMessage();
break;
}
} else {
}
} catch (IOException ex) {
(new MyAppException(FacesMessage.SEVERITY_FATAL, "Une erreur est survenue lors du traitement du fichier.", ex)).doFacesMessage();
} catch (MyAppException ex) {
ex.doFacesMessage();
}
}
}
<h:form enctype="multipart/form-data">
<p:messages showDetail="true" />
<p:fileUpload
mode="advanced"
skinSimple="true"
auto="true"
multiple="false"
required="true"
update="@form"
fileUploadListener="#{fileImportBean.handleFileUpload}"
</h:form>
答案 0 :(得分：2)
由于@AxelRichter在评论部分提出的想法，我发现我包含了使用旧版POI（3.15）的JAR（由我的同事制作）。我也将此升级到了4.0.0，瞧！ 至少我今天学到了一些东西... 谢谢！