package com.product.module.data.utli;
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import com.alibaba.excel.enums.CellDataTypeEnum;
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import com.alibaba.excel.metadata.Head;
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import com.alibaba.excel.metadata.data.CellData;
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import com.alibaba.excel.metadata.data.WriteCellData;
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import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
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import com.alibaba.excel.write.style.column.AbstractColumnWidthStyleStrategy;
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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 java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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public class Custemhandler extends AbstractColumnWidthStyleStrategy {
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private static final int MAX_COLUMN_WIDTH = 255;
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private Map<Integer, Map<Integer, Integer>> cache = new HashMap<Integer, Map<Integer, Integer>>(8);
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@Override
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protected void setColumnWidth(WriteSheetHolder writeSheetHolder, List<WriteCellData<?>> cellDataList, Cell cell, Head head,
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Integer relativeRowIndex, Boolean isHead) {
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boolean needSetWidth = isHead || !CollectionUtils.isEmpty(cellDataList);
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if (!needSetWidth) {
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return;
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}
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Map<Integer, Integer> maxColumnWidthMap = cache.get(writeSheetHolder.getSheetNo());
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if (maxColumnWidthMap == null) {
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maxColumnWidthMap = new HashMap<Integer, Integer>(16);
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cache.put(writeSheetHolder.getSheetNo(), maxColumnWidthMap);
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}
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Integer columnWidth = dataLength(cellDataList, cell, isHead);
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if (columnWidth < 0) {
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return;
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}
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if (columnWidth > MAX_COLUMN_WIDTH) {
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columnWidth = MAX_COLUMN_WIDTH;
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}
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Integer maxColumnWidth = maxColumnWidthMap.get(cell.getColumnIndex());
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if (maxColumnWidth == null || columnWidth > maxColumnWidth) {
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maxColumnWidthMap.put(cell.getColumnIndex(), columnWidth);
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writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), columnWidth * 256);
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}
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}
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private Integer dataLength(List<WriteCellData<?>> cellDataList, Cell cell, Boolean isHead) {
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if (isHead) {
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return cell.getStringCellValue().getBytes().length;
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}
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CellData cellData = cellDataList.get(0);
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CellDataTypeEnum type = cellData.getType();
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if (type == null) {
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return -1;
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}
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switch (type) {
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case STRING:
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return cellData.getStringValue().getBytes().length;
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case BOOLEAN:
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return cellData.getBooleanValue().toString().getBytes().length;
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case NUMBER:
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return cellData.getNumberValue().toString().getBytes().length;
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default:
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return -1;
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}
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}
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}
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