完成csv转换书写

src/main/java/com/alibaba/excel/enums/NumericCellTypeEnum.java

@@ -0,0 +1,22 @@
+package com.alibaba.excel.enums;
+
+import org.apache.poi.ss.usermodel.CellType;
+
+/**
+ * Used to supplement {@link CellType}.
+ *
+ * Cannot distinguish between date and number in write case.
+ *
+ * @author Jiaju Zhuang
+ */
+public enum NumericCellTypeEnum {
+    /**
+     * number
+     */
+    NUMBER,
+    /**
+     * date. Support only when writing.
+     */
+    DATE,
+    ;
+}

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

@@ -18,7 +18,6 @@ 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;
@@ -47,6 +46,11 @@ public class CsvCell extends CellBase {
     @Setter(value = AccessLevel.NONE)
     private CellType cellType;
 
+    /**
+     * numeric cell type
+     */
+    private NumericCellTypeEnum numericCellType;
+
     /**
      * workbook
      */
@@ -65,7 +69,7 @@ public class CsvCell extends CellBase {
     /**
      * {@link CellType#NUMERIC}
      */
-    private Double numberValue;
+    private BigDecimal numberValue;
     /**
      * {@link CellType#STRING} and {@link CellType#ERROR} {@link CellType#FORMULA}
      */
@@ -75,6 +79,11 @@ public class CsvCell extends CellBase {
      */
     private Boolean booleanValue;
 
+    /**
+     * {@link CellType#NUMERIC}
+     */
+    private LocalDateTime dateValue;
+
     /**
      * formula
      */
@@ -121,25 +130,33 @@ public class CsvCell extends CellBase {
 
     @Override
     protected void setCellValueImpl(double value) {
-        this.numberValue = value;
+        numberValue = BigDecimal.valueOf(value);
         this.cellType = CellType.NUMERIC;
     }
 
     @Override
     protected void setCellValueImpl(Date value) {
-        this.numberValue = DateUtil.getExcelDate(value, csvWorkbook.getUse1904windowing());
+        if (value == null) {
+            return;
+        }
+        this.dateValue = LocalDateTime.ofInstant(value.toInstant(), ZoneId.systemDefault());
         this.cellType = CellType.NUMERIC;
+        this.numericCellType = NumericCellTypeEnum.DATE;
     }
 
     @Override
     protected void setCellValueImpl(LocalDateTime value) {
-        this.numberValue = DateUtil.getExcelDate(value, csvWorkbook.getUse1904windowing());
+        this.dateValue = value;
         this.cellType = CellType.NUMERIC;
+        this.numericCellType = NumericCellTypeEnum.DATE;
     }
 
     @Override
     protected void setCellValueImpl(Calendar value) {
-        this.numberValue = DateUtil.getExcelDate(value, csvWorkbook.getUse1904windowing());
+        if (value == null) {
+            return;
+        }
+        this.dateValue = LocalDateTime.ofInstant(value.toInstant(), ZoneId.systemDefault());
         this.cellType = CellType.NUMERIC;
     }
 
@@ -231,18 +248,15 @@ public class CsvCell extends CellBase {
 
     @Override
     public Date getDateCellValue() {
-        if (numberValue == null) {
+        if (dateValue == null) {
             return null;
         }
-        return DateUtil.getJavaDate(numberValue, csvWorkbook.getUse1904windowing());
+        return Date.from(dateValue.atZone(ZoneId.systemDefault()).toInstant());
     }
 
     @Override
     public LocalDateTime getLocalDateTimeCellValue() {
-        if (numberValue == null) {
-            return null;
-        }
-        return DateUtil.getLocalDateTime(numberValue, csvWorkbook.getUse1904windowing());
+        return dateValue;
     }
 
     @Override
@@ -263,7 +277,7 @@ public class CsvCell extends CellBase {
 
     @Override
     public void setCellErrorValue(byte value) {
-        this.numberValue = value;
+        this.numberValue = BigDecimal.valueOf(value);
         this.cellType = CellType.ERROR;
     }
 

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

@@ -52,13 +52,17 @@ public class CsvCellStyle implements CellStyle {
 
     @Override
     public short getDataFormat() {
-        initDataFormatData();
+        if (dataFormatData == null) {
+            return 0;
+        }
         return dataFormatData.getIndex();
     }
 
     @Override
     public String getDataFormatString() {
-        initDataFormatData();
+        if (dataFormatData == null) {
+            return null;
+        }
         return dataFormatData.getFormat();
     }
 

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

@@ -7,9 +7,9 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
+import com.alibaba.excel.constant.BuiltinFormats;
 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;
@@ -25,6 +25,7 @@ import org.apache.poi.ss.usermodel.CellStyle;
 import org.apache.poi.ss.usermodel.Comment;
 import org.apache.poi.ss.usermodel.DataValidation;
 import org.apache.poi.ss.usermodel.DataValidationHelper;
+import org.apache.poi.ss.usermodel.DateUtil;
 import org.apache.poi.ss.usermodel.Drawing;
 import org.apache.poi.ss.usermodel.Footer;
 import org.apache.poi.ss.usermodel.Header;
@@ -45,7 +46,6 @@ import org.apache.poi.ss.util.PaneInformation;
  */
 @Data
 public class CsvSheet implements Sheet, Closeable {
-
     /**
      * workbook
      */
@@ -747,21 +747,40 @@ public class CsvSheet implements Sheet, Closeable {
             case FORMULA:
                 return csvCell.getStringCellValue();
             case NUMERIC:
-
-                NumberDataFormatterUtils.format()
-
+                Short dataFormat = null;
+                String dataFormatString = null;
+                if (csvCell.getCellStyle() != null) {
+                    dataFormat = csvCell.getCellStyle().getDataFormat();
+                    dataFormatString = csvCell.getCellStyle().getDataFormatString();
+                }
                 if (csvCell.getNumericCellType() == NumericCellTypeEnum.DATE) {
+                    if (csvCell.getDateValue() == null) {
+                        return null;
+                    }
                     // date
-                    if (contentProperty == null || contentProperty.getDateTimeFormatProperty() == null) {
-                        return new WriteCellData<>(DateUtils.format(value, null));
-                    } else {
-                        return new WriteCellData<>(
-                            DateUtils.format(value, contentProperty.getDateTimeFormatProperty().getFormat()));
+                    if (dataFormat == null) {
+                        dataFormatString = DateUtils.defaultDateFormat;
+                        dataFormat = csvWorkbook.createDataFormat().getFormat(dataFormatString);
                     }
-
+                    if (dataFormatString == null) {
+                        dataFormatString = csvWorkbook.createDataFormat().getFormat(dataFormat);
+                    }
+                    return NumberDataFormatterUtils.format(
+                        DateUtil.getExcelDate(csvCell.getDateValue(), csvWorkbook.getUse1904windowing()),
+                        dataFormat, dataFormatString, csvWorkbook.getUse1904windowing(), csvWorkbook.getLocale(),
+                        csvWorkbook.getUseScientificFormat());
                 } else {
+                    if (csvCell.getNumberValue() == null) {
+                        return null;
+                    }
                     //number
-
+                    if (dataFormat == null) {
+                        dataFormat = BuiltinFormats.GENERAL;
+                        dataFormatString = csvWorkbook.createDataFormat().getFormat(dataFormat);
+                    }
+                    return NumberDataFormatterUtils.format(csvCell.getNumericCellValue(), dataFormat, dataFormatString,
+                        csvWorkbook.getUse1904windowing(), csvWorkbook.getLocale(),
+                        csvWorkbook.getUseScientificFormat());
                 }
             case BOOLEAN:
                 return csvCell.getBooleanValue().toString();
@@ -772,6 +791,4 @@ public class CsvSheet implements Sheet, Closeable {
         }
     }
 
-    private String
-
 }

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

@@ -32,10 +32,7 @@ public class CsvWorkbook implements Workbook {
      * output
      */
     private Appendable out;
-    /**
-     * locale
-     */
-    private Locale locale;
+
     /**
      * true if date uses 1904 windowing, or false if using 1900 date windowing.
      *
@@ -45,6 +42,18 @@ public class CsvWorkbook implements Workbook {
      */
     private Boolean use1904windowing;
 
+    /**
+     * locale
+     */
+    private Locale locale;
+
+    /**
+     * Whether to use scientific Format.
+     *
+     * default is false
+     */
+    private Boolean useScientificFormat;
+
     /**
      * data format
      */
@@ -58,10 +67,11 @@ public class CsvWorkbook implements Workbook {
      */
     private List<CsvCellStyle> csvCellStyleList;
 
-    public CsvWorkbook(Appendable out, Locale locale, Boolean use1904windowing) {
+    public CsvWorkbook(Appendable out, Locale locale, Boolean use1904windowing, Boolean useScientificFormat) {
         this.out = out;
         this.locale = locale;
         this.use1904windowing = use1904windowing;
+        this.useScientificFormat = useScientificFormat;
     }
 
     @Override

src/main/java/com/alibaba/excel/metadata/data/DataFormatData.java

@@ -19,10 +19,6 @@ public class DataFormatData {
      */
     private String format;
 
-    public DataFormatData() {
-        this.index = 0;
-    }
-
     @Override
     public DataFormatData clone() {
         DataFormatData dataFormatData = new DataFormatData();

src/main/java/com/alibaba/excel/metadata/format/DataFormatter.java

@@ -34,6 +34,8 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import com.alibaba.excel.util.DateUtils;
+
 import org.apache.poi.ss.format.CellFormat;
 import org.apache.poi.ss.format.CellFormatResult;
 import org.apache.poi.ss.usermodel.DateUtil;
@@ -42,9 +44,6 @@ import org.apache.poi.ss.usermodel.FractionFormat;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.alibaba.excel.metadata.GlobalConfiguration;
-import com.alibaba.excel.util.DateUtils;
-
 /**
  * Written with reference to {@link org.apache.poi.ss.usermodel.DataFormatter}.Made some optimizations for date
  * conversion.
@@ -54,21 +53,31 @@ import com.alibaba.excel.util.DateUtils;
  * @author Jiaju Zhuang
  */
 public class DataFormatter {
-    /** For logging any problems we find */
+    /**
+     * For logging any problems we find
+     */
     private static final Logger LOGGER = LoggerFactory.getLogger(DataFormatter.class);
     private static final String defaultFractionWholePartFormat = "#";
     private static final String defaultFractionFractionPartFormat = "#/##";
-    /** Pattern to find a number format: "0" or "#" */
+    /**
+     * Pattern to find a number format: "0" or "#"
+     */
     private static final Pattern numPattern = Pattern.compile("[0#]+");
 
-    /** Pattern to find days of week as text "ddd...." */
+    /**
+     * Pattern to find days of week as text "ddd...."
+     */
     private static final Pattern daysAsText = Pattern.compile("([d]{3,})", Pattern.CASE_INSENSITIVE);
 
-    /** Pattern to find "AM/PM" marker */
+    /**
+     * Pattern to find "AM/PM" marker
+     */
     private static final Pattern amPmPattern =
         Pattern.compile("(([AP])[M/P]*)|(([上下])[午/下]*)", Pattern.CASE_INSENSITIVE);
 
-    /** Pattern to find formats with condition ranges e.g. [>=100] */
+    /**
+     * Pattern to find formats with condition ranges e.g. [>=100]
+     */
     private static final Pattern rangeConditionalPattern =
         Pattern.compile(".*\\[\\s*(>|>=|<|<=|=)\\s*[0-9]*\\.*[0-9].*");
 
@@ -107,10 +116,10 @@ public class DataFormatter {
      * ("#").
      */
     private static final String invalidDateTimeString;
+
     static {
         StringBuilder buf = new StringBuilder();
-        for (int i = 0; i < 255; i++)
-            buf.append('#');
+        for (int i = 0; i < 255; i++) {buf.append('#');}
         invalidDateTimeString = buf.toString();
     }
 
@@ -123,14 +132,18 @@ public class DataFormatter {
      * The date symbols of the locale used for formatting values.
      */
     private DateFormatSymbols dateSymbols;
-    /** A default format to use when a number pattern cannot be parsed. */
+    /**
+     * A default format to use when a number pattern cannot be parsed.
+     */
     private Format defaultNumFormat;
     /**
      * A map to cache formats. Map<String,Format> formats
      */
     private final Map<String, Format> formats = new HashMap<String, Format>();
 
-    /** stores the locale valid it the last formatting call */
+    /**
+     * stores the locale valid it the last formatting call
+     */
     private Locale locale;
     /**
      * true if date uses 1904 windowing, or false if using 1900 date windowing.
@@ -149,23 +162,26 @@ public class DataFormatter {
 
     /**
      * Creates a formatter using the given locale.
-     *
      */
-    public DataFormatter(GlobalConfiguration globalConfiguration) {
-        if (globalConfiguration == null) {
+    public DataFormatter(Boolean use1904windowing, Locale locale, Boolean useScientificFormat) {
+        if (use1904windowing == null) {
             this.use1904windowing = Boolean.FALSE;
+        } else {
+            this.use1904windowing = use1904windowing;
+        }
+
+        if (locale == null) {
             this.locale = Locale.getDefault();
+        } else {
+            this.locale = locale;
+        }
+
+        if (use1904windowing == null) {
             this.useScientificFormat = Boolean.FALSE;
         } else {
-            this.use1904windowing =
-                globalConfiguration.getUse1904windowing() != null ? globalConfiguration.getUse1904windowing()
-                    : Boolean.FALSE;
-            this.locale =
-                globalConfiguration.getLocale() != null ? globalConfiguration.getLocale() : Locale.getDefault();
-            this.useScientificFormat =
-                globalConfiguration.getUseScientificFormat() != null ? globalConfiguration.getUseScientificFormat()
-                    : Boolean.FALSE;
+            this.useScientificFormat = useScientificFormat;
         }
+
         this.dateSymbols = DateFormatSymbols.getInstance(this.locale);
         this.decimalSymbols = DecimalFormatSymbols.getInstance(this.locale);
     }
@@ -240,11 +256,9 @@ public class DataFormatter {
 
             // Paranoid replacement...
             int at = formatStr.indexOf(colour);
-            if (at == -1)
-                break;
+            if (at == -1) {break;}
             String nFormatStr = formatStr.substring(0, at) + formatStr.substring(at + colour.length());
-            if (nFormatStr.equals(formatStr))
-                break;
+            if (nFormatStr.equals(formatStr)) {break;}
 
             // Try again in case there's multiple
             formatStr = nFormatStr;
@@ -601,8 +615,7 @@ public class DataFormatter {
      * number format, or no rules apply, the cell's style format is used. If the style does not have a format, the
      * default date format is applied.
      *
-     * @param data
-     *            to format
+     * @param data             to format
      * @param dataFormat
      * @param dataFormatString
      * @return Formatted value
@@ -624,8 +637,7 @@ public class DataFormatter {
      * Format comes from either the highest priority conditional format rule with a specified format, or from the cell
      * style.
      *
-     * @param data
-     *            to format
+     * @param data             to format
      * @param dataFormat
      * @param dataFormatString
      * @return a formatted number string
@@ -663,8 +675,7 @@ public class DataFormatter {
      * <code>Number</code> value.
      * </p>
      *
-     * @param format
-     *            A Format instance to be used as a default
+     * @param format A Format instance to be used as a default
      * @see Format#format
      */
     public void setDefaultNumberFormat(Format format) {
@@ -684,10 +695,8 @@ public class DataFormatter {
      * <code>Number</code> value.
      * </p>
      *
-     * @param excelFormatStr
-     *            The data format string
-     * @param format
-     *            A Format instance
+     * @param excelFormatStr The data format string
+     * @param format         A Format instance
      */
     public void addFormat(String excelFormatStr, Format format) {
         formats.put(excelFormatStr, format);
@@ -715,10 +724,8 @@ public class DataFormatter {
     /**
      * Enables custom rounding mode on the given Decimal Format.
      *
-     * @param format
-     *            DecimalFormat
-     * @param roundingMode
-     *            RoundingMode
+     * @param format       DecimalFormat
+     * @param roundingMode RoundingMode
      */
     public static void setExcelStyleRoundingMode(DecimalFormat format, RoundingMode roundingMode) {
         format.setRoundingMode(roundingMode);
@@ -737,7 +744,9 @@ public class DataFormatter {
             // enforce singleton
         }
 
-        /** Format a number as an SSN */
+        /**
+         * Format a number as an SSN
+         */
         public static String format(Number num) {
             String result = df.format(num);
             return result.substring(0, 3) + '-' + result.substring(3, 5) + '-' + result.substring(5, 9);
@@ -767,7 +776,9 @@ public class DataFormatter {
             // enforce singleton
         }
 
-        /** Format a number as Zip + 4 */
+        /**
+         * Format a number as Zip + 4
+         */
         public static String format(Number num) {
             String result = df.format(num);
             return result.substring(0, 5) + '-' + result.substring(5, 9);
@@ -797,7 +808,9 @@ public class DataFormatter {
             // enforce singleton
         }
 
-        /** Format a number as a phone number */
+        /**
+         * Format a number as a phone number
+         */
         public static String format(Number num) {
             String result = df.format(num);
             StringBuilder sb = new StringBuilder();
@@ -833,7 +846,8 @@ public class DataFormatter {
     }
 
     /**
-     * Workaround until we merge {@link org.apache.poi.ss.usermodel.DataFormatter} with {@link CellFormat}. Constant, non-cachable wrapper around a
+     * Workaround until we merge {@link org.apache.poi.ss.usermodel.DataFormatter} with {@link CellFormat}. Constant,
+     * non-cachable wrapper around a
      * {@link CellFormatResult}
      */
     private final class CellFormatResultWrapper extends Format {

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

@@ -1,5 +1,7 @@
 package com.alibaba.excel.util;
 
+import java.util.Locale;
+
 import com.alibaba.excel.metadata.format.DataFormatter;
 import com.alibaba.excel.metadata.GlobalConfiguration;
 
@@ -26,13 +28,32 @@ public class NumberDataFormatterUtils {
      */
     public static String format(Double data, Short dataFormat, String dataFormatString,
         GlobalConfiguration globalConfiguration) {
+        if (globalConfiguration == null) {
+            return format(data, dataFormat, dataFormatString, null, null, null);
+        }
+        return format(data, dataFormat, dataFormatString, globalConfiguration.getUse1904windowing(),
+            globalConfiguration.getLocale(), globalConfiguration.getUseScientificFormat());
+    }
+
+    /**
+     * Format number data.
+     *
+     * @param data
+     * @param dataFormat          Not null.
+     * @param dataFormatString
+     * @param use1904windowing
+     * @param locale
+     * @param useScientificFormat
+     * @return
+     */
+    public static String format(Double data, Short dataFormat, String dataFormatString, Boolean use1904windowing,
+        Locale locale, Boolean useScientificFormat) {
         DataFormatter dataFormatter = DATA_FORMATTER_THREAD_LOCAL.get();
         if (dataFormatter == null) {
-            dataFormatter = new DataFormatter(globalConfiguration);
+            dataFormatter = new DataFormatter(use1904windowing, locale, useScientificFormat);
             DATA_FORMATTER_THREAD_LOCAL.set(dataFormatter);
         }
         return dataFormatter.format(data, dataFormat, dataFormatString);
-
     }
 
     public static void removeThreadLocalCache() {

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

@@ -69,7 +69,9 @@ public class WorkBookUtil {
             case CSV:
                 CsvWorkbook csvWorkbook = new CsvWorkbook(
                     new OutputStreamWriter(writeWorkbookHolder.getOutputStream(), writeWorkbookHolder.getCharset()),
-                    writeWorkbookHolder.getGlobalConfiguration().getLocale(), writeWorkbookHolder.getGlobalConfiguration().getUse1904windowing());
+                    writeWorkbookHolder.getGlobalConfiguration().getLocale(),
+                    writeWorkbookHolder.getGlobalConfiguration().getUse1904windowing(),
+                    writeWorkbookHolder.getGlobalConfiguration().getUseScientificFormat());
                 writeWorkbookHolder.setCachedWorkbook(csvWorkbook);
                 writeWorkbookHolder.setWorkbook(csvWorkbook);
                 return;