mirror of https://github.com/alibaba/easyexcel
Jiaju Zhuang
4 years ago
62 changed files with 746 additions and 540 deletions
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package com.alibaba.excel.constant; |
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/** |
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* Order constant. |
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* |
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* @author Jiaju Zhuang |
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*/ |
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public class OrderConstant { |
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/** |
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* Sorting of styles written to cells. |
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*/ |
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public static final int FILL_DATA_FORMAT = 10000; |
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} |
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package com.alibaba.excel.converters.date; |
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import java.util.Date; |
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import com.alibaba.excel.converters.Converter; |
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import com.alibaba.excel.metadata.CellData; |
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import com.alibaba.excel.metadata.property.ExcelContentProperty; |
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import com.alibaba.excel.util.WorkBookUtil; |
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import com.alibaba.excel.write.metadata.holder.WriteHolder; |
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/** |
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* Date and date converter |
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* |
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* @author Jiaju Zhuang |
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*/ |
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public class DateDateConverter implements Converter<Date> { |
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@Override |
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public Class<Date> supportJavaTypeKey() { |
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return Date.class; |
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} |
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@Override |
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public CellData<?> convertToExcelData(Date value, ExcelContentProperty contentProperty, |
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WriteHolder currentWriteHolder) throws Exception { |
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CellData<?> cellData = new CellData<>(value); |
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if (contentProperty == null || contentProperty.getDateTimeFormatProperty() == null |
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|| contentProperty.getDateTimeFormatProperty().getFormat() == null) { |
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return cellData; |
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} |
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WorkBookUtil.fillDataFormat(cellData, currentWriteHolder, |
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contentProperty.getDateTimeFormatProperty().getFormat()); |
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return cellData; |
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} |
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} |
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package com.alibaba.excel.util; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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/** |
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* Map utils |
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* |
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* @author Jiaju Zhuang |
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**/ |
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public class MapUtils { |
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private MapUtils() {} |
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/** |
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* Creates a <i>mutable</i>, empty {@code HashMap} instance. |
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* |
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* <p><b>Note:</b> if mutability is not required, use {@link ImmutableMap#of()} instead. |
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* |
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* <p><b>Note:</b> if {@code K} is an {@code enum} type, use {@link #newEnumMap} instead. |
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* |
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* <p><b>Note for Java 7 and later:</b> this method is now unnecessary and should be treated as |
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* deprecated. Instead, use the {@code HashMap} constructor directly, taking advantage of the new |
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* <a href="http://goo.gl/iz2Wi">"diamond" syntax</a>. |
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* |
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* @return a new, empty {@code HashMap} |
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*/ |
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public static <K, V> HashMap<K, V> newHashMap() { |
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return new HashMap<>(); |
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} |
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/** |
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* Creates a {@code HashMap} instance, with a high enough "initial capacity" that it <i>should</i> |
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* hold {@code expectedSize} elements without growth. This behavior cannot be broadly guaranteed, |
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* but it is observed to be true for OpenJDK 1.7. It also can't be guaranteed that the method |
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* isn't inadvertently <i>oversizing</i> the returned map. |
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* |
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* @param expectedSize the number of entries you expect to add to the returned map |
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* @return a new, empty {@code HashMap} with enough capacity to hold {@code expectedSize} entries |
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* without resizing |
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* @throws IllegalArgumentException if {@code expectedSize} is negative |
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*/ |
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public static <K, V> HashMap<K, V> newHashMapWithExpectedSize(int expectedSize) { |
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return new HashMap<>(capacity(expectedSize)); |
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} |
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/** |
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* Returns a capacity that is sufficient to keep the map from being resized as long as it grows no |
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* larger than expectedSize and the load factor is ≥ its default (0.75). |
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*/ |
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static int capacity(int expectedSize) { |
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if (expectedSize < 3) { |
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return expectedSize + 1; |
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} |
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if (expectedSize < IntUtils.MAX_POWER_OF_TWO) { |
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// This is the calculation used in JDK8 to resize when a putAll
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// happens; it seems to be the most conservative calculation we
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// can make. 0.75 is the default load factor.
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return (int) ((float) expectedSize / 0.75F + 1.0F); |
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} |
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return Integer.MAX_VALUE; |
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} |
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} |
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@ -0,0 +1,75 @@
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package com.alibaba.excel.write.handler.impl; |
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import java.util.HashSet; |
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import java.util.List; |
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import java.util.Set; |
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import com.alibaba.excel.constant.OrderConstant; |
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import com.alibaba.excel.enums.CellDataTypeEnum; |
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import com.alibaba.excel.event.Order; |
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import com.alibaba.excel.metadata.CellData; |
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import com.alibaba.excel.metadata.Head; |
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import com.alibaba.excel.util.DateUtils; |
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import com.alibaba.excel.write.handler.CellWriteHandler; |
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import com.alibaba.excel.write.metadata.holder.WriteSheetHolder; |
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import com.alibaba.excel.write.metadata.holder.WriteTableHolder; |
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import lombok.extern.slf4j.Slf4j; |
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import org.apache.commons.collections4.CollectionUtils; |
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import org.apache.poi.ss.usermodel.Cell; |
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import org.apache.poi.ss.usermodel.CellStyle; |
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import org.apache.poi.ss.usermodel.DataFormat; |
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import org.apache.poi.ss.usermodel.Workbook; |
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/** |
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* fill cell style. |
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* |
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* @author Jiaju Zhuang |
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*/ |
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@Slf4j |
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public class FillDataFormatCellWriteHandler implements CellWriteHandler, Order { |
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private final Set<CellStyle> cellStyleSet = new HashSet<>(); |
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private CellStyle defaultDateCellStyle; |
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@Override |
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public int order() { |
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return OrderConstant.FILL_DATA_FORMAT; |
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} |
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@Override |
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public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, |
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List<CellData<?>> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) { |
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if (CollectionUtils.isEmpty(cellDataList) || cellDataList.size() > 1) { |
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return; |
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} |
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CellData<?> cellData = cellDataList.get(0); |
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CellStyle cellStyle = cell.getCellStyle(); |
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if (cellStyle == null) { |
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if (cellData.getType() == CellDataTypeEnum.DATE) { |
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cell.setCellStyle(getDefaultDateCellStyle(writeSheetHolder)); |
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} |
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return; |
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} |
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if (cellStyleSet.contains(cellStyle)) { |
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return; |
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} |
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if (cellData.getDataFormat() != null && cellData.getDataFormat() >= 0) { |
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cellStyle.setDataFormat(cellData.getDataFormat()); |
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} |
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cellStyleSet.add(cellStyle); |
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} |
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private CellStyle getDefaultDateCellStyle(WriteSheetHolder writeSheetHolder) { |
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if (defaultDateCellStyle != null) { |
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return defaultDateCellStyle; |
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} |
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Workbook workbook = writeSheetHolder.getParentWriteWorkbookHolder().getWorkbook(); |
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defaultDateCellStyle = workbook.createCellStyle(); |
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DataFormat dataFormat = workbook.createDataFormat(); |
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defaultDateCellStyle.setDataFormat(dataFormat.getFormat(DateUtils.defaultDateFormat)); |
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return defaultDateCellStyle; |
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} |
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} |
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