优化读写逻辑

src/main/java/com/alibaba/excel/ExcelReader.java

@@ -285,7 +285,7 @@ public class ExcelReader {
         }
         try {
             excelAnalyser.finish();
-        } catch (Exception e) {
+        } catch (Throwable e) {
             LOGGER.warn("Destroy object failed", e);
         }
     }

src/main/java/com/alibaba/excel/analysis/ExcelAnalyserImpl.java

 package com.alibaba.excel.analysis;
 
-import java.io.IOException;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -34,7 +32,7 @@ public class ExcelAnalyserImpl implements ExcelAnalyser {
         } catch (RuntimeException e) {
             finish();
             throw e;
-        } catch (Exception e) {
+        } catch (Throwable e) {
             finish();
             throw new ExcelAnalysisException(e);
         }
@@ -72,7 +70,7 @@ public class ExcelAnalyserImpl implements ExcelAnalyser {
         } catch (RuntimeException e) {
             finish();
             throw e;
-        } catch (Exception e) {
+        } catch (Throwable e) {
             finish();
             throw new ExcelAnalysisException(e);
         }
@@ -88,14 +86,22 @@ public class ExcelAnalyserImpl implements ExcelAnalyser {
             if (readWorkbookHolder.getReadCache() != null) {
                 readWorkbookHolder.getReadCache().destroy();
             }
+        } catch (Throwable e) {
+            throw new ExcelAnalysisException("Can not close IO", e);
+        }
+        try {
             if (analysisContext.readWorkbookHolder().getAutoCloseStream()
                 && readWorkbookHolder.getInputStream() != null) {
                 readWorkbookHolder.getInputStream().close();
             }
+        } catch (Throwable e) {
+            throw new ExcelAnalysisException("Can not close IO", e);
+        }
+        try {
             if (readWorkbookHolder.getTempFile() != null) {
                 FileUtils.delete(readWorkbookHolder.getTempFile());
             }
-        } catch (IOException e) {
+        } catch (Throwable e) {
             throw new ExcelAnalysisException("Can not close IO", e);
         }
     }

src/main/java/com/alibaba/excel/analysis/v03/XlsSaxAnalyser.java

@@ -14,7 +14,10 @@ import org.apache.poi.hssf.eventusermodel.HSSFListener;
 import org.apache.poi.hssf.eventusermodel.HSSFRequest;
 import org.apache.poi.hssf.eventusermodel.MissingRecordAwareHSSFListener;
 import org.apache.poi.hssf.eventusermodel.dummyrecord.LastCellOfRowDummyRecord;
+import org.apache.poi.hssf.record.ExtendedFormatRecord;
 import org.apache.poi.hssf.record.Record;
+import org.apache.poi.hssf.record.StyleRecord;
+import org.apache.poi.hssf.usermodel.HSSFCellStyle;
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.poifs.filesystem.POIFSFileSystem;
 

src/main/java/com/alibaba/excel/analysis/v03/handlers/NumberRecordHandler.java

@@ -30,6 +30,8 @@ public class NumberRecordHandler extends AbstractXlsRecordHandler {
         this.row = numrec.getRow();
         this.column = numrec.getColumn();
         this.cellData = new CellData(numrec.getValue());
+        this.cellData.setDataFormat(formatListener.getFormatIndex(numrec));
+        this.cellData.setDataFormatString(formatListener.getFormatString(numrec));
     }
 
     @Override

src/main/java/com/alibaba/excel/analysis/v07/SharedStringsTableHandler.java

 package com.alibaba.excel.analysis.v07;
 
+import org.xml.sax.Attributes;
 import org.xml.sax.helpers.DefaultHandler;
 
 import com.alibaba.excel.cache.ReadCache;
@@ -11,22 +12,40 @@ import com.alibaba.excel.cache.ReadCache;
  */
 public class SharedStringsTableHandler extends DefaultHandler {
     private static final String T_TAG = "t";
+    private static final String SI_TAG = "si";
+    /**
+     * The final piece of data
+     */
     private String currentData;
+    /**
+     * Current element data
+     */
+    private String currentElementData;
+
     private ReadCache readCache;
 
     public SharedStringsTableHandler(ReadCache readCache) {
         this.readCache = readCache;
     }
 
+    @Override
+    public void startElement(String uri, String localName, String name, Attributes attributes) {
+        if (SI_TAG.equals(name)) {
+            currentData = "";
+        }
+    }
+
     @Override
     public void endElement(String uri, String localName, String name) {
         if (T_TAG.equals(name)) {
+            currentData += currentElementData;
+        } else if (SI_TAG.equals(name)) {
             readCache.put(currentData);
         }
     }
 
     @Override
     public void characters(char[] ch, int start, int length) {
-        currentData = new String(ch, start, length);
+        currentElementData = new String(ch, start, length);
     }
 }

src/main/java/com/alibaba/excel/analysis/v07/XlsxHandlerFactory.java

@@ -3,6 +3,8 @@ package com.alibaba.excel.analysis.v07;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.apache.poi.xssf.model.StylesTable;
+
 import com.alibaba.excel.analysis.v07.handlers.CountRowCellHandler;
 import com.alibaba.excel.analysis.v07.handlers.DefaultCellHandler;
 import com.alibaba.excel.analysis.v07.handlers.ProcessResultCellHandler;
@@ -10,14 +12,14 @@ import com.alibaba.excel.context.AnalysisContext;
 
 /**
  * Build handler
- * 
+ *
  * @author Dan Zheng
  */
 public class XlsxHandlerFactory {
-    public static List<XlsxCellHandler> buildCellHandlers(AnalysisContext analysisContext) {
+    public static List<XlsxCellHandler> buildCellHandlers(AnalysisContext analysisContext, StylesTable stylesTable) {
         List<XlsxCellHandler> result = new ArrayList<XlsxCellHandler>();
         result.add(new CountRowCellHandler(analysisContext));
-        DefaultCellHandler defaultCellHandler = new DefaultCellHandler(analysisContext);
+        DefaultCellHandler defaultCellHandler = new DefaultCellHandler(analysisContext, stylesTable);
         result.add(defaultCellHandler);
         result.add(new ProcessResultCellHandler(analysisContext, defaultCellHandler));
         return result;

src/main/java/com/alibaba/excel/analysis/v07/XlsxRowHandler.java

@@ -2,6 +2,7 @@ package com.alibaba.excel.analysis.v07;
 
 import java.util.List;
 
+import org.apache.poi.xssf.model.StylesTable;
 import org.xml.sax.Attributes;
 import org.xml.sax.SAXException;
 import org.xml.sax.helpers.DefaultHandler;
@@ -17,8 +18,8 @@ public class XlsxRowHandler extends DefaultHandler {
     private List<XlsxCellHandler> cellHandlers;
     private XlsxRowResultHolder rowResultHolder;
 
-    public XlsxRowHandler(AnalysisContext analysisContext) {
-        this.cellHandlers = XlsxHandlerFactory.buildCellHandlers(analysisContext);
+    public XlsxRowHandler(AnalysisContext analysisContext, StylesTable stylesTable) {
+        this.cellHandlers = XlsxHandlerFactory.buildCellHandlers(analysisContext, stylesTable);
         for (XlsxCellHandler cellHandler : cellHandlers) {
             if (cellHandler instanceof XlsxRowResultHolder) {
                 this.rowResultHolder = (XlsxRowResultHolder)cellHandler;

src/main/java/com/alibaba/excel/analysis/v07/XlsxSaxAnalyser.java

@@ -15,6 +15,7 @@ import javax.xml.parsers.SAXParserFactory;
 import org.apache.poi.openxml4j.opc.OPCPackage;
 import org.apache.poi.openxml4j.opc.PackagePart;
 import org.apache.poi.xssf.eventusermodel.XSSFReader;
+import org.apache.poi.xssf.model.StylesTable;
 import org.apache.poi.xssf.usermodel.XSSFRelation;
 import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook;
 import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbookPr;
@@ -47,6 +48,10 @@ public class XlsxSaxAnalyser implements ExcelExecutor {
     private AnalysisContext analysisContext;
     private List<ReadSheet> sheetList;
     private Map<Integer, InputStream> sheetMap;
+    /**
+     * Current style information
+     */
+    private StylesTable stylesTable;
 
     public XlsxSaxAnalyser(AnalysisContext analysisContext) throws Exception {
         this.analysisContext = analysisContext;
@@ -64,9 +69,9 @@ public class XlsxSaxAnalyser implements ExcelExecutor {
         analysisSharedStringsTable(sharedStringsTablePackagePart.getInputStream(), readWorkbookHolder);
 
         XSSFReader xssfReader = new XSSFReader(pkg);
-
         analysisUse1904WindowDate(xssfReader, readWorkbookHolder);
 
+        stylesTable = xssfReader.getStylesTable();
         sheetList = new ArrayList<ReadSheet>();
         sheetMap = new HashMap<Integer, InputStream>();
         XSSFReader.SheetIterator ite = (XSSFReader.SheetIterator)xssfReader.getSheetsData();
@@ -94,12 +99,12 @@ public class XlsxSaxAnalyser implements ExcelExecutor {
         }
         if (size < USE_MAP_CACHE_SIZE) {
             if (LOGGER.isDebugEnabled()) {
-                LOGGER.info("Use map cache.size:{}", size);
+                LOGGER.debug("Use map cache.size:{}", size);
             }
             readWorkbookHolder.setReadCache(new MapCache());
         } else {
             if (LOGGER.isDebugEnabled()) {
-                LOGGER.info("Use ehcache.size:{}", size);
+                LOGGER.debug("Use ehcache.size:{}", size);
             }
             readWorkbookHolder.setReadCache(new Ehcache());
         }
@@ -178,7 +183,7 @@ public class XlsxSaxAnalyser implements ExcelExecutor {
     @Override
     public void execute() {
         parseXmlSource(sheetMap.get(analysisContext.readSheetHolder().getSheetNo()),
-            new XlsxRowHandler(analysisContext));
+            new XlsxRowHandler(analysisContext, stylesTable));
     }
 
 }

src/main/java/com/alibaba/excel/analysis/v07/handlers/DefaultCellHandler.java

 package com.alibaba.excel.analysis.v07.handlers;
 
+import static com.alibaba.excel.constant.ExcelXmlConstants.CELL_DATA_FORMAT_TAG;
 import static com.alibaba.excel.constant.ExcelXmlConstants.CELL_FORMULA_TAG;
 import static com.alibaba.excel.constant.ExcelXmlConstants.CELL_INLINE_STRING_VALUE_TAG;
 import static com.alibaba.excel.constant.ExcelXmlConstants.CELL_TAG;
@@ -9,6 +10,9 @@ import static com.alibaba.excel.constant.ExcelXmlConstants.CELL_VALUE_TYPE_TAG;
 import java.util.Map;
 import java.util.TreeMap;
 
+import org.apache.poi.ss.usermodel.BuiltinFormats;
+import org.apache.poi.xssf.model.StylesTable;
+import org.apache.poi.xssf.usermodel.XSSFCellStyle;
 import org.apache.poi.xssf.usermodel.XSSFRichTextString;
 import org.xml.sax.Attributes;
 
@@ -36,9 +40,14 @@ public class DefaultCellHandler implements XlsxCellHandler, XlsxRowResultHolder
     private int curCol;
     private Map<Integer, CellData> curRowContent = new TreeMap<Integer, CellData>();
     private CellData currentCellData;
+    /**
+     * Current style information
+     */
+    private StylesTable stylesTable;
 
-    public DefaultCellHandler(AnalysisContext analysisContext) {
+    public DefaultCellHandler(AnalysisContext analysisContext, StylesTable stylesTable) {
         this.analysisContext = analysisContext;
+        this.stylesTable = stylesTable;
     }
 
     @Override
@@ -75,6 +84,21 @@ public class DefaultCellHandler implements XlsxCellHandler, XlsxRowResultHolder
             // t is null ,it's means Empty or Number
             CellDataTypeEnum type = CellDataTypeEnum.buildFromCellType(attributes.getValue(CELL_VALUE_TYPE_TAG));
             currentCellData = new CellData(type);
+
+            // Put in data transformation information
+            String dateFormatIndex = attributes.getValue(CELL_DATA_FORMAT_TAG);
+            if (dateFormatIndex != null) {
+                int dateFormatIndexInteger = Integer.parseInt(dateFormatIndex);
+                XSSFCellStyle xssfCellStyle = stylesTable.getStyleAt(dateFormatIndexInteger);
+                int dataFormat = xssfCellStyle.getDataFormat();
+                String dataFormatString = xssfCellStyle.getDataFormatString();
+                currentCellData.setDataFormat(dataFormat);
+                if (dataFormatString == null) {
+                    currentCellData.setDataFormatString(BuiltinFormats.getBuiltinFormat(dataFormat));
+                } else {
+                    currentCellData.setDataFormatString(dataFormatString);
+                }
+            }
         }
         // cell is formula
         if (CELL_FORMULA_TAG.equals(name)) {

src/main/java/com/alibaba/excel/constant/ExcelXmlConstants.java

@@ -11,6 +11,10 @@ public class ExcelXmlConstants {
     public static final String ROW_TAG = "row";
     public static final String CELL_TAG = "c";
     public static final String CELL_VALUE_TYPE_TAG = "t";
+    /**
+     * Number formatted label
+     */
+    public static final String CELL_DATA_FORMAT_TAG = "s";
     public static final String CELL_FORMULA_TAG = "f";
     public static final String CELL_VALUE_TAG = "v";
     /**

src/main/java/com/alibaba/excel/context/WriteContextImpl.java

 package com.alibaba.excel.context;
 
-import java.io.IOException;
 import java.io.OutputStream;
 import java.util.List;
 import java.util.Map;
@@ -347,19 +346,29 @@ public class WriteContextImpl implements WriteContext {
         try {
             writeWorkbookHolder.getWorkbook().write(writeWorkbookHolder.getOutputStream());
             writeWorkbookHolder.getWorkbook().close();
-            if (writeWorkbookHolder.getAutoCloseStream()) {
-                if (writeWorkbookHolder.getOutputStream() != null) {
-                    writeWorkbookHolder.getOutputStream().close();
-                }
-                if (writeWorkbookHolder.getTemplateInputStream() != null) {
-                    writeWorkbookHolder.getTemplateInputStream().close();
-                }
-            } else {
-                if (writeWorkbookHolder.getFile() != null && writeWorkbookHolder.getOutputStream() != null) {
-                    writeWorkbookHolder.getOutputStream().close();
-                }
+        } catch (Throwable e) {
+            throw new ExcelGenerateException("Can not close IO", e);
+        }
+        try {
+            if (writeWorkbookHolder.getAutoCloseStream() && writeWorkbookHolder.getOutputStream() != null) {
+                writeWorkbookHolder.getOutputStream().close();
+            }
+        } catch (Throwable e) {
+            throw new ExcelGenerateException("Can not close IO", e);
+        }
+        try {
+            if (writeWorkbookHolder.getAutoCloseStream() && writeWorkbookHolder.getTemplateInputStream() != null) {
+                writeWorkbookHolder.getTemplateInputStream().close();
+            }
+        } catch (Throwable e) {
+            throw new ExcelGenerateException("Can not close IO", e);
+        }
+        try {
+            if (!writeWorkbookHolder.getAutoCloseStream() && writeWorkbookHolder.getFile() != null
+                && writeWorkbookHolder.getOutputStream() != null) {
+                writeWorkbookHolder.getOutputStream().close();
             }
-        } catch (IOException e) {
+        } catch (Throwable e) {
             throw new ExcelGenerateException("Can not close IO", e);
         }
         if (LOGGER.isDebugEnabled()) {

src/main/java/com/alibaba/excel/converters/string/StringNumberConverter.java

 package com.alibaba.excel.converters.string;
 
 import org.apache.poi.hssf.usermodel.HSSFDateUtil;
+import org.apache.poi.ss.usermodel.DateUtil;
 
 import com.alibaba.excel.converters.Converter;
 import com.alibaba.excel.enums.CellDataTypeEnum;
@@ -38,6 +39,19 @@ public class StringNumberConverter implements Converter<String> {
                 contentProperty.getDateTimeFormatProperty().getFormat());
         }
         // If there are "NumberFormat", read as number
+        if (contentProperty != null && contentProperty.getNumberFormatProperty() != null) {
+            return NumberUtils.format(cellData.getDoubleValue(), contentProperty);
+        }
+        // Excel defines formatting
+        if (cellData.getDataFormat() != null) {
+            if (DateUtil.isADateFormat(cellData.getDataFormat(), cellData.getDataFormatString())) {
+                return DateUtils.format(HSSFDateUtil.getJavaDate(cellData.getDoubleValue(),
+                    globalConfiguration.getUse1904windowing(), null));
+            } else {
+                return NumberUtils.format(cellData.getDoubleValue(), contentProperty);
+            }
+        }
+        // Default conversion number
         return NumberUtils.format(cellData.getDoubleValue(), contentProperty);
     }
 

src/main/java/com/alibaba/excel/metadata/CellData.java

@@ -23,6 +23,14 @@ public class CellData {
     private Boolean booleanValue;
     private Boolean formula;
     private String formulaValue;
+    /**
+     * The number formatting
+     */
+    private Integer dataFormat;
+    /**
+     * The string of number formatting
+     */
+    private String dataFormatString;
 
     public CellData(CellData other) {
         this.type = other.type;
@@ -31,6 +39,8 @@ public class CellData {
         this.booleanValue = other.booleanValue;
         this.formula = other.formula;
         this.formulaValue = other.formulaValue;
+        this.dataFormat = other.dataFormat;
+        this.dataFormatString = other.dataFormatString;
     }
 
     public CellData(String stringValue) {
@@ -123,6 +133,22 @@ public class CellData {
         this.formulaValue = formulaValue;
     }
 
+    public Integer getDataFormat() {
+        return dataFormat;
+    }
+
+    public void setDataFormat(Integer dataFormat) {
+        this.dataFormat = dataFormat;
+    }
+
+    public String getDataFormatString() {
+        return dataFormatString;
+    }
+
+    public void setDataFormatString(String dataFormatString) {
+        this.dataFormatString = dataFormatString;
+    }
+
     @Override
     public String toString() {
         switch (type) {

src/main/java/com/alibaba/excel/write/ExcelBuilderImpl.java

@@ -51,7 +51,7 @@ public class ExcelBuilderImpl implements ExcelBuilder {
         } catch (RuntimeException e) {
             finish();
             throw e;
-        } catch (Exception e) {
+        } catch (Throwable e) {
             finish();
             throw new ExcelGenerateException(e);
         }
@@ -88,7 +88,7 @@ public class ExcelBuilderImpl implements ExcelBuilder {
         } catch (RuntimeException e) {
             finish();
             throw e;
-        } catch (Exception e) {
+        } catch (Throwable e) {
             finish();
             throw new ExcelGenerateException(e);
         }

src/test/java/com/alibaba/easyexcel/test/core/converter/ConverterDataTest.java

@@ -53,7 +53,7 @@ public class ConverterDataTest {
     }
 
     @Test
-    public void T03ReadAllConverter03() {
+    public void T04ReadAllConverter03() {
         readAllConverter("converter" + File.separator + "converter03.xls");
     }
 

src/test/java/com/alibaba/easyexcel/test/core/converter/ReadAllConverterData.java

@@ -42,4 +42,5 @@ public class ReadAllConverterData {
     private String stringError;
     private String stringFormulaNumber;
     private String stringFormulaString;
+    private String stringNumberDate;
 }

src/test/java/com/alibaba/easyexcel/test/core/converter/ReadAllConverterDataListener.java

@@ -64,6 +64,7 @@ public class ReadAllConverterDataListener extends AnalysisEventListener<ReadAllC
         Assert.assertEquals(data.getStringBoolean(), "true");
         Assert.assertEquals(data.getStringString(), "测试");
         Assert.assertEquals(data.getStringError(), "#VALUE!");
+        Assert.assertEquals(data.getStringNumberDate(), "2020-01-01 01:01:01");
         Assert.assertEquals(data.getStringFormulaNumber(), "2.0");
         Assert.assertEquals(data.getStringFormulaString(), "1测试");
         LOGGER.debug("First row:{}", JSON.toJSONString(list.get(0)));

src/test/java/com/alibaba/easyexcel/test/temp/StyleTest.java

+package com.alibaba.easyexcel.test.temp;
+
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.util.Date;
+import java.util.List;
+
+import org.apache.poi.hssf.usermodel.HSSFDateUtil;
+import org.apache.poi.hssf.usermodel.HSSFRow;
+import org.apache.poi.hssf.usermodel.HSSFSheet;
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+import org.apache.poi.ss.usermodel.BuiltinFormats;
+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.ExcelStyleDateFormatter;
+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.junit.Ignore;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.alibaba.excel.EasyExcel;
+import com.alibaba.fastjson.JSON;
+
+/**
+ * 临时测试
+ *
+ * @author Jiaju Zhuang
+ **/
+@Ignore
+public class StyleTest {
+    private static final Logger LOGGER = LoggerFactory.getLogger(StyleTest.class);
+
+    @Test
+    public void test() {
+        List<Object> list = EasyExcel.read("D:\\test\\styleTest.xls").sheet().headRowNumber(0).doReadSync();
+        for (Object data : list) {
+            LOGGER.info("返回数据：{}", JSON.toJSONString(data));
+        }
+    }
+
+    @Test
+    public void poi() throws Exception {
+        InputStream is = new FileInputStream("D:\\test\\styleTest.xls");
+        HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
+        HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(0);
+        HSSFRow hssfRow = hssfSheet.getRow(0);
+        System.out.println(hssfRow.getCell(0).getCellStyle().getDataFormatString());
+        DataFormatter formatter = new DataFormatter();
+        System.out.println(hssfRow.getCell(0).getNumericCellValue());
+        System.out.println(hssfRow.getCell(1).getNumericCellValue());
+        System.out.println(hssfRow.getCell(2).getNumericCellValue());
+        System.out.println(hssfRow.getCell(0).getCellStyle().getDataFormatString());
+        System.out.println(hssfRow.getCell(1).getCellStyle().getDataFormatString());
+        System.out.println(hssfRow.getCell(2).getCellStyle().getDataFormatString());
+
+    }
+
+    @Test
+    public void poi07() throws Exception {
+        InputStream is = new FileInputStream("D:\\test\\styleTest.xlsx");
+        Workbook workbook = WorkbookFactory.create(is); // 这种方式 Excel 2003/2007/2010 都是可以处理的
+        Sheet sheet = workbook.getSheetAt(0);
+        Row hssfRow = sheet.getRow(0);
+        System.out.println(hssfRow.getCell(0).getCellStyle().getDataFormatString());
+        DataFormatter formatter = new DataFormatter();
+        System.out.println(hssfRow.getCell(0).getNumericCellValue());
+        System.out.println(hssfRow.getCell(1).getNumericCellValue());
+        System.out.println(hssfRow.getCell(2).getNumericCellValue());
+        System.out.println(hssfRow.getCell(0).getCellStyle().getDataFormat());
+        System.out.println(hssfRow.getCell(1).getCellStyle().getDataFormat());
+        System.out.println(hssfRow.getCell(2).getCellStyle().getDataFormat());
+        System.out.println(hssfRow.getCell(3).getCellStyle().getDataFormat());
+        System.out.println(hssfRow.getCell(0).getCellStyle().getDataFormatString());
+        System.out.println(hssfRow.getCell(1).getCellStyle().getDataFormatString());
+        System.out.println(hssfRow.getCell(2).getCellStyle().getDataFormatString());
+        System.out.println(hssfRow.getCell(3).getCellStyle().getDataFormatString());
+        isDate(hssfRow.getCell(0));
+        isDate(hssfRow.getCell(1));
+        isDate(hssfRow.getCell(2));
+        isDate(hssfRow.getCell(3));
+
+    }
+
+    @Test
+    public void poi0701() throws Exception {
+        InputStream is = new FileInputStream("D:\\test\\f1.xlsx");
+        Workbook workbook = WorkbookFactory.create(is); // 这种方式 Excel 2003/2007/2010 都是可以处理的
+        Sheet sheet = workbook.getSheetAt(0);
+        print(sheet.getRow(0).getCell(0));
+        print(sheet.getRow(1).getCell(0));
+        print(sheet.getRow(2).getCell(0));
+        print(sheet.getRow(3).getCell(0));
+    }
+
+    private void print(Cell cell) {
+        System.out.println(
+            DateUtil.isADateFormat(cell.getCellStyle().getDataFormat(), cell.getCellStyle().getDataFormatString()));
+        System.out.println(cell.getCellStyle().getDataFormat());
+        System.out.println(cell.getCellStyle().getDataFormatString());
+        DataFormatter f = new DataFormatter();
+        System.out.println(f.formatCellValue(cell));
+        if (cell.getCellStyle().getDataFormatString() != null) {
+
+        }
+        ExcelStyleDateFormatter ff = new ExcelStyleDateFormatter(cell.getCellStyle().getDataFormatString());
+
+    }
+
+    @Test
+    public void testFormatter() throws Exception {
+        ExcelStyleDateFormatter ff = new ExcelStyleDateFormatter("yyyy年m月d日");
+
+        System.out.println(ff.format(new Date()));
+    }
+
+    private void isDate(Cell cell) {
+        System.out.println(
+            DateUtil.isADateFormat(cell.getCellStyle().getDataFormat(), cell.getCellStyle().getDataFormatString()));
+        System.out.println(HSSFDateUtil.isCellDateFormatted(cell));
+        DataFormatter f = new DataFormatter();
+        System.out.println(f.formatCellValue(cell));
+
+    }
+
+    @Test
+    public void testBuiltinFormats() throws Exception {
+        System.out.println(BuiltinFormats.getBuiltinFormat(48));
+        System.out.println(BuiltinFormats.getBuiltinFormat(57));
+        System.out.println(BuiltinFormats.getBuiltinFormat(28));
+
+    }
+
+}

src/test/java/com/alibaba/easyexcel/test/temp/poi/PoiFormatTest.java

+package com.alibaba.easyexcel.test.temp.poi;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.apache.poi.ss.usermodel.DateUtil;
+import org.apache.poi.xssf.streaming.SXSSFRow;
+import org.apache.poi.xssf.streaming.SXSSFSheet;
+import org.apache.poi.xssf.streaming.SXSSFWorkbook;
+import org.apache.poi.xssf.usermodel.XSSFRow;
+import org.apache.poi.xssf.usermodel.XSSFSheet;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.alibaba.easyexcel.test.util.TestFileUtil;
+
+/**
+ * 测试poi
+ *
+ * @author Jiaju Zhuang
+ **/
+@Ignore
+public class PoiFormatTest {
+    private static final Logger LOGGER = LoggerFactory.getLogger(PoiFormatTest.class);
+
+    @Test
+    public void lastRowNum() throws IOException {
+        String file = TestFileUtil.getPath() + "demo" + File.separator + "demo.xlsx";
+        SXSSFWorkbook xssfWorkbook = new SXSSFWorkbook(new XSSFWorkbook(file));
+        SXSSFSheet xssfSheet = xssfWorkbook.getSheetAt(0);
+        LOGGER.info("一共行数:{}", xssfSheet.getLastRowNum());
+        SXSSFRow row = xssfSheet.getRow(0);
+        LOGGER.info("第一行数据:{}", row);
+        xssfSheet.createRow(20);
+        LOGGER.info("一共行数:{}", xssfSheet.getLastRowNum());
+    }
+
+    @Test
+    public void lastRowNumXSSF() throws IOException {
+        String file = TestFileUtil.getPath() + "demo" + File.separator + "demo.xlsx";
+        XSSFWorkbook xssfWorkbook = new XSSFWorkbook(file);
+        LOGGER.info("一共:{}个sheet", xssfWorkbook.getNumberOfSheets());
+        XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(0);
+        LOGGER.info("一共行数:{}", xssfSheet.getLastRowNum());
+        XSSFRow row = xssfSheet.getRow(0);
+        LOGGER.info("第一行数据:{}", row);
+        xssfSheet.createRow(20);
+        LOGGER.info("一共行数:{}", xssfSheet.getLastRowNum());
+    }
+}

update.md

@@ -5,6 +5,7 @@
 * 极大优化读大文件的内存和效率
 * sheetNo 改成0开始
 * 读支持指定列名
+* 升级poi 到4.0.1
 # 1.2.4
 修复read()方法存在的bug
 # 1.2.1