Apache.POI.HSSF获取单元格数据为String类型(参考源码)新

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POI获取单元格数据为String类型

HSSFCell 如何获取数据类型 String

用法:

/*** .* 获取单元格数据内容为字符串类型的数据* TODO* @param cell Excel单元格* @returnString 单元格数据内容*/private String getStringCellValue(HSSFCell cell) {String cellValue = "";  if(cell.getCellType()==cell.CELL_TYPE_STRING) {cellValue = cell.getRichStringCellValue().getString(); }if(cell.getCellType()==cell.CELL_TYPE_NUMERIC) {cell.setCellType(cell.CELL_TYPE_STRING);  cellValue = String.valueOf(cell.getRichStringCellValue().getString());}return cellValue;}

用switch,case编译器会报错。(case值必须为常量)

参考源码:

Licensed to the Apache Software Foundation (ASF) under one or morepackage org.apache.poi.hssf.usermodel;import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.List;import org.apache.poi.hssf.model.HSSFFormulaParser;
import org.apache.poi.hssf.model.InternalWorkbook;
import org.apache.poi.hssf.record.BlankRecord;
import org.apache.poi.hssf.record.BoolErrRecord;
import org.apache.poi.hssf.record.CellValueRecordInterface;
import org.apache.poi.hssf.record.ExtendedFormatRecord;
import org.apache.poi.hssf.record.FormulaRecord;
import org.apache.poi.hssf.record.HyperlinkRecord;
import org.apache.poi.hssf.record.LabelSSTRecord;
import org.apache.poi.hssf.record.NumberRecord;
import org.apache.poi.hssf.record.Record;
import org.apache.poi.hssf.record.RecordBase;
import org.apache.poi.hssf.record.aggregates.FormulaRecordAggregate;
import org.apache.poi.hssf.record.common.UnicodeString;
import org.apache.poi.ss.SpreadsheetVersion;
import org.apache.poi.ss.formula.FormulaType;
import org.apache.poi.ss.formula.eval.ErrorEval;
import org.apache.poi.ss.formula.ptg.ExpPtg;
import org.apache.poi.ss.formula.ptg.Ptg;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.Comment;
import org.apache.poi.ss.usermodel.FormulaError;
import org.apache.poi.ss.usermodel.Hyperlink;
import org.apache.poi.ss.usermodel.RichTextString;
import org.apache.poi.ss.util.CellAddress;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.ss.util.NumberToTextConverter;
import org.apache.poi.util.Internal;
import org.apache.poi.util.LocaleUtil;/*** High level representation of a cell in a row of a spreadsheet.* Cells can be numeric, formula-based or string-based (text).  The cell type* specifies this.  String cells cannot contain numbers and numeric cells cannot* contain strings (at least according to our model).  Client apps should do the* conversions themselves.  Formula cells have the formula string, as well as* the formula result, which can be numeric or string.* <p>* Cells should have their number (0 based) before being added to a row.  Only* cells that have values should be added.* <p>*/
public class HSSFCell implements Cell {private static final String FILE_FORMAT_NAME  = "BIFF8";/*** The maximum  number of columns in BIFF8*/public static final int LAST_COLUMN_NUMBER  = SpreadsheetVersion.EXCEL97.getLastColumnIndex(); // 2^8 - 1private static final String LAST_COLUMN_NAME  = SpreadsheetVersion.EXCEL97.getLastColumnName();public final static short        ENCODING_UNCHANGED          = -1;public final static short        ENCODING_COMPRESSED_UNICODE = 0;public final static short        ENCODING_UTF_16             = 1;private final HSSFWorkbook       _book;private final HSSFSheet          _sheet;private CellType                 _cellType;private HSSFRichTextString       _stringValue;private CellValueRecordInterface _record;private HSSFComment              _comment;/*** Creates new Cell - Should only be called by HSSFRow.  This creates a cell* from scratch.* <p>* When the cell is initially created it is set to {@link CellType#BLANK}. Cell types* can be changed/overwritten by calling setCellValue with the appropriate* type as a parameter although conversions from one type to another may be* prohibited.** @param book - Workbook record of the workbook containing this cell* @param sheet - Sheet record of the sheet containing this cell* @param row   - the row of this cell* @param col   - the column for this cell** @see org.apache.poi.hssf.usermodel.HSSFRow#createCell(int)*/protected HSSFCell(HSSFWorkbook book, HSSFSheet sheet, int row, short col){checkBounds(col);_stringValue  = null;_book    = book;_sheet   = sheet;// Relying on the fact that by default the cellType is set to 0 which// is different to {@link CellType#BLANK} hence the following method call correctly// creates a new blank cell.short xfindex = sheet.getSheet().getXFIndexForColAt(col);setCellType(CellType.BLANK, false, row, col,xfindex);}/*** Returns the HSSFSheet this cell belongs to** @return the HSSFSheet that owns this cell*/public HSSFSheet getSheet() {return _sheet;}/*** Returns the HSSFRow this cell belongs to** @return the HSSFRow that owns this cell*/public HSSFRow getRow() {int rowIndex = getRowIndex();return _sheet.getRow(rowIndex);}/*** Creates new Cell - Should only be called by HSSFRow.  This creates a cell* from scratch.** @param book - Workbook record of the workbook containing this cell* @param sheet - Sheet record of the sheet containing this cell* @param row   - the row of this cell* @param col   - the column for this cell* @param type  - Type of cell* @see org.apache.poi.hssf.usermodel.HSSFRow#createCell(int,int)*/protected HSSFCell(HSSFWorkbook book, HSSFSheet sheet, int row, short col,CellType type){checkBounds(col);_cellType     = CellType._NONE; // Force 'setCellType' to create a first Record_stringValue  = null;_book    = book;_sheet   = sheet;short xfindex = sheet.getSheet().getXFIndexForColAt(col);setCellType(type,false,row,col,xfindex);}/*** Creates an HSSFCell from a CellValueRecordInterface.  HSSFSheet uses this when* reading in cells from an existing sheet.** @param book - Workbook record of the workbook containing this cell* @param sheet - Sheet record of the sheet containing this cell* @param cval - the Cell Value Record we wish to represent*/protected HSSFCell(HSSFWorkbook book, HSSFSheet sheet, CellValueRecordInterface cval) {_record      = cval;_cellType    = determineType(cval);_stringValue = null;_book   = book;_sheet  = sheet;switch (_cellType){case STRING :_stringValue = new HSSFRichTextString(book.getWorkbook(), (LabelSSTRecord ) cval);break;case BLANK :break;case FORMULA :_stringValue=new HSSFRichTextString(((FormulaRecordAggregate) cval).getStringValue());break;default :break;}}/*** used internally -- given a cell value record, figure out its type*/private static CellType determineType(CellValueRecordInterface cval) {if (cval instanceof FormulaRecordAggregate) {return CellType.FORMULA;}// all others are plain BIFF recordsRecord record = ( Record ) cval;switch (record.getSid()) {case NumberRecord.sid :   return CellType.NUMERIC;case BlankRecord.sid :    return CellType.BLANK;case LabelSSTRecord.sid : return CellType.STRING;case BoolErrRecord.sid :BoolErrRecord boolErrRecord = ( BoolErrRecord ) record;return boolErrRecord.isBoolean()? CellType.BOOLEAN: CellType.ERROR;}throw new RuntimeException("Bad cell value rec (" + cval.getClass().getName() + ")");}/*** Returns the Workbook that this Cell is bound to*/protected InternalWorkbook getBoundWorkbook() {return _book.getWorkbook();}/*** @return the (zero based) index of the row containing this cell*/@Overridepublic int getRowIndex() {return _record.getRow();}/*** Updates the cell record's idea of what*  column it belongs in (0 based)* @param num the new cell number*/protected void updateCellNum(