修改日期格式

src/main/java/com/alibaba/excel/metadata/csv/CsvCell.java

@@ -6,6 +6,7 @@ import java.time.ZoneId;
 import java.util.Calendar;
 import java.util.Date;
 
+import com.alibaba.excel.enums.NumericCellTypeEnum;
 import com.alibaba.excel.metadata.data.FormulaData;
 
 import lombok.AccessLevel;
@@ -17,6 +18,7 @@ import org.apache.poi.ss.usermodel.CellBase;
 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.DateUtil;
 import org.apache.poi.ss.usermodel.Hyperlink;
 import org.apache.poi.ss.usermodel.RichTextString;
 import org.apache.poi.ss.usermodel.Row;
@@ -44,6 +46,17 @@ public class CsvCell extends CellBase {
     @Getter(value = AccessLevel.NONE)
     @Setter(value = AccessLevel.NONE)
     private CellType cellType;
+
+    /**
+     * workbook
+     */
+    private final CsvWorkbook csvWorkbook;
+
+    /**
+     * sheet
+     */
+    private final CsvSheet csvSheet;
+
     /**
      * row
      */
@@ -52,7 +65,7 @@ public class CsvCell extends CellBase {
     /**
      * {@link CellType#NUMERIC}
      */
-    private BigDecimal numberValue;
+    private Double numberValue;
     /**
      * {@link CellType#STRING} and {@link CellType#ERROR} {@link CellType#FORMULA}
      */
@@ -62,11 +75,6 @@ public class CsvCell extends CellBase {
      */
     private Boolean booleanValue;
 
-    /**
-     * {@link CellType#NUMERIC}
-     */
-    private LocalDateTime dateValue;
-
     /**
      * formula
      */
@@ -82,7 +90,9 @@ public class CsvCell extends CellBase {
      */
     private CellStyle cellStyle;
 
-    public CsvCell(CsvRow csvRow, Integer columnIndex, CellType cellType) {
+    public CsvCell(CsvWorkbook csvWorkbook, CsvSheet csvSheet, CsvRow csvRow, Integer columnIndex, CellType cellType) {
+        this.csvWorkbook = csvWorkbook;
+        this.csvSheet = csvSheet;
         this.csvRow = csvRow;
         this.columnIndex = columnIndex;
         this.cellType = cellType;
@@ -111,31 +121,25 @@ public class CsvCell extends CellBase {
 
     @Override
     protected void setCellValueImpl(double value) {
-        numberValue = BigDecimal.valueOf(value);
+        this.numberValue = value;
         this.cellType = CellType.NUMERIC;
     }
 
     @Override
     protected void setCellValueImpl(Date value) {
-        if (value == null) {
+        this.numberValue = DateUtil.getExcelDate(value, csvWorkbook.getUse1904windowing());
-            return;
-        }
-        this.dateValue = LocalDateTime.ofInstant(value.toInstant(), ZoneId.systemDefault());
         this.cellType = CellType.NUMERIC;
     }
 
     @Override
     protected void setCellValueImpl(LocalDateTime value) {
-        this.dateValue = value;
+        this.numberValue = DateUtil.getExcelDate(value, csvWorkbook.getUse1904windowing());
         this.cellType = CellType.NUMERIC;
     }
 
     @Override
     protected void setCellValueImpl(Calendar value) {
-        if (value == null) {
+        this.numberValue = DateUtil.getExcelDate(value, csvWorkbook.getUse1904windowing());
-            return;
-        }
-        this.dateValue = LocalDateTime.ofInstant(value.toInstant(), ZoneId.systemDefault());
         this.cellType = CellType.NUMERIC;
     }
 
@@ -227,15 +231,18 @@ public class CsvCell extends CellBase {
 
     @Override
     public Date getDateCellValue() {
-        if (dateValue == null) {
+        if (numberValue == null) {
             return null;
         }
-        return Date.from(dateValue.atZone(ZoneId.systemDefault()).toInstant());
+        return DateUtil.getJavaDate(numberValue, csvWorkbook.getUse1904windowing());
     }
 
     @Override
     public LocalDateTime getLocalDateTimeCellValue() {
-        return dateValue;
+        if (numberValue == null) {
+            return null;
+        }
+        return DateUtil.getLocalDateTime(numberValue, csvWorkbook.getUse1904windowing());
     }
 
     @Override
@@ -256,12 +263,15 @@ public class CsvCell extends CellBase {
 
     @Override
     public void setCellErrorValue(byte value) {
-        this.numberValue = BigDecimal.valueOf(value);
+        this.numberValue = value;
         this.cellType = CellType.ERROR;
     }
 
     @Override
     public boolean getBooleanCellValue() {
+        if (booleanValue == null) {
+            return false;
+        }
         return booleanValue;
     }
 

src/main/java/com/alibaba/excel/metadata/csv/CsvRow.java

@@ -25,10 +25,16 @@ public class CsvRow implements Row {
      */
     private final List<CsvCell> cellList;
 
+    /**
+     * workbook
+     */
+    private final CsvWorkbook csvWorkbook;
+
     /**
      * sheet
      */
     private final CsvSheet csvSheet;
+
     /**
      * row index
      */
@@ -39,22 +45,23 @@ public class CsvRow implements Row {
      */
     private CellStyle cellStyle;
 
-    public CsvRow(CsvSheet csvSheet, Integer rowIndex) {
+    public CsvRow(CsvWorkbook csvWorkbook, CsvSheet csvSheet, Integer rowIndex) {
         cellList = Lists.newArrayList();
+        this.csvWorkbook = csvWorkbook;
         this.csvSheet = csvSheet;
         this.rowIndex = rowIndex;
     }
 
     @Override
     public Cell createCell(int column) {
-        CsvCell cell = new CsvCell(this, column, null);
+        CsvCell cell = new CsvCell(csvWorkbook, csvSheet, this, column, null);
         cellList.add(cell);
         return cell;
     }
 
     @Override
     public Cell createCell(int column, CellType type) {
-        CsvCell cell = new CsvCell(this, column, type);
+        CsvCell cell = new CsvCell(csvWorkbook, csvSheet, this, column, type);
         cellList.add(cell);
         return cell;
     }

src/main/java/com/alibaba/excel/metadata/csv/CsvSheet.java

@@ -7,8 +7,13 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
+import com.alibaba.excel.enums.NumericCellTypeEnum;
 import com.alibaba.excel.exception.ExcelGenerateException;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.util.DateUtils;
 import com.alibaba.excel.util.ListUtils;
+import com.alibaba.excel.util.NumberDataFormatterUtils;
+import com.alibaba.excel.util.StringUtils;
 
 import lombok.Data;
 import org.apache.commons.csv.CSVFormat;
@@ -61,7 +66,8 @@ public class CsvSheet implements Sheet, Closeable {
     /**
      * last row index
      */
-    private int lastRowIndex;
+    private Integer lastRowIndex;
+
     /**
      * row cache
      */
@@ -74,7 +80,7 @@ public class CsvSheet implements Sheet, Closeable {
     public CsvSheet(CsvWorkbook csvWorkbook, Appendable out) {
         this.csvWorkbook = csvWorkbook;
         this.out = out;
-        this.rowCacheCount = 500;
+        this.rowCacheCount = 3000;
         this.csvFormat = CSVFormat.DEFAULT;
         this.lastRowIndex = -1;
     }
@@ -87,7 +93,7 @@ public class CsvSheet implements Sheet, Closeable {
         lastRowIndex++;
         assert rownum == lastRowIndex : "csv create row must be in order.";
         printData();
-        CsvRow csvRow = new CsvRow(this, rownum);
+        CsvRow csvRow = new CsvRow(csvWorkbook, this, rownum);
         rowCache.add(csvRow);
         return csvRow;
     }
@@ -724,7 +730,7 @@ public class CsvSheet implements Sheet, Closeable {
                 Iterator<Cell> cellIterator = row.cellIterator();
                 while (cellIterator.hasNext()) {
                     CsvCell csvCell = (CsvCell)cellIterator.next();
-                    csvPrinter.print(csvCell.getStringCellValue());
+                    csvPrinter.print(buildCellValue(csvCell));
                 }
                 csvPrinter.println();
             }
@@ -734,4 +740,38 @@ public class CsvSheet implements Sheet, Closeable {
         }
     }
 
+    private String buildCellValue(CsvCell csvCell) {
+        switch (csvCell.getCellType()) {
+            case STRING:
+            case ERROR:
+            case FORMULA:
+                return csvCell.getStringCellValue();
+            case NUMERIC:
+
+                NumberDataFormatterUtils.format()
+
+                if (csvCell.getNumericCellType() == NumericCellTypeEnum.DATE) {
+                    // date
+                    if (contentProperty == null || contentProperty.getDateTimeFormatProperty() == null) {
+                        return new WriteCellData<>(DateUtils.format(value, null));
+                    } else {
+                        return new WriteCellData<>(
+                            DateUtils.format(value, contentProperty.getDateTimeFormatProperty().getFormat()));
+                    }
+
+                } else {
+                    //number
+
+                }
+            case BOOLEAN:
+                return csvCell.getBooleanValue().toString();
+            case BLANK:
+                return StringUtils.EMPTY;
+            default:
+                return null;
+        }
+    }
+
+    private String
+
 }

src/main/java/com/alibaba/excel/metadata/csv/CsvWorkbook.java

@@ -36,6 +36,14 @@ public class CsvWorkbook implements Workbook {
      * locale
      */
     private Locale locale;
+    /**
+     * true if date uses 1904 windowing, or false if using 1900 date windowing.
+     *
+     * default is false
+     *
+     * @return
+     */
+    private Boolean use1904windowing;
 
     /**
      * data format
@@ -50,9 +58,10 @@ public class CsvWorkbook implements Workbook {
      */
     private List<CsvCellStyle> csvCellStyleList;
 
-    public CsvWorkbook(Appendable out, Locale locale) {
+    public CsvWorkbook(Appendable out, Locale locale, Boolean use1904windowing) {
         this.out = out;
         this.locale = locale;
+        this.use1904windowing = use1904windowing;
     }
 
     @Override

src/main/java/com/alibaba/excel/util/StyleUtil.java

@@ -123,7 +123,7 @@ public class StyleUtil {
 
     public static Font buildFont(Workbook workbook, WriteFont writeFont) {
         Font font = workbook.createFont();
-        if (writeFont == null) {
+        if (writeFont == null || font == null) {
             return font;
         }
         if (writeFont.getFontName() != null) {

src/main/java/com/alibaba/excel/util/WorkBookUtil.java

@@ -69,7 +69,7 @@ public class WorkBookUtil {
             case CSV:
                 CsvWorkbook csvWorkbook = new CsvWorkbook(
                     new OutputStreamWriter(writeWorkbookHolder.getOutputStream(), writeWorkbookHolder.getCharset()),
-                    writeWorkbookHolder.getGlobalConfiguration().getLocale());
+                    writeWorkbookHolder.getGlobalConfiguration().getLocale(), writeWorkbookHolder.getGlobalConfiguration().getUse1904windowing());
                 writeWorkbookHolder.setCachedWorkbook(csvWorkbook);
                 writeWorkbookHolder.setWorkbook(csvWorkbook);
                 return;

src/test/java/com/alibaba/easyexcel/test/temp/csv/CsvReadTest.java

@@ -84,7 +84,7 @@ public class CsvReadTest {
         List<CsvData> list = new ArrayList<>();
         for (int i = 0; i < 10; i++) {
             CsvData data = new CsvData();
-            data.setString("字符串" + i);
+            data.setString("字符,串" + i);
             data.setDate(new Date());
             data.setDoubleData(0.56);
             data.setIgnore("忽略" + i);