报警记录导出

linwei

2026-01-08 777eeea75ffc628d024ded81f19deff78f4f42af

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package org.sxkj.fw.utils.excel;
 
import com.alibaba.excel.enums.CellDataTypeEnum;
import com.alibaba.excel.metadata.Head;
import com.alibaba.excel.metadata.data.CellData;
import com.alibaba.excel.metadata.data.WriteCellData;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.style.column.AbstractColumnWidthStyleStrategy;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Sheet;
import org.springblade.core.tool.utils.CollectionUtil;
 
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
/**
 * 自适应行款
 * @author zhongrj
 * @since 2021-10-29
 */
public class CustomCellWriteWeightConfig extends AbstractColumnWidthStyleStrategy {
    private Map<Integer, Map<Integer, Integer>> CACHE = new HashMap<>();
 
    @Override
    protected void setColumnWidth(WriteSheetHolder writeSheetHolder, List<WriteCellData<?>> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
        // 在3.0版本中，列宽设置逻辑已改变，使用此方法进行设置
        Sheet sheet = writeSheetHolder.getSheet();
        Integer columnWidth = CACHE.get(writeSheetHolder.getSheetNo()) != null ?
                CACHE.get(writeSheetHolder.getSheetNo()).get(cell.getColumnIndex()) : null;
        if (columnWidth != null) {
            sheet.setColumnWidth(cell.getColumnIndex(), columnWidth * 256);
        }
 
        super.setColumnWidth(writeSheetHolder, cellDataList, cell, head, relativeRowIndex, isHead);
    }
 
    /**
     * 计算长度
     * @param cellDataList
     * @param cell
     * @param isHead
     * @return
     */
    private Integer dataLength(List<CellData> cellDataList, Cell cell, Boolean isHead) {
        if (isHead) {
            return cell.getStringCellValue().getBytes().length;
        } else {
            CellData cellData = cellDataList.get(0);
            CellDataTypeEnum type = cellData.getType();
            if (type == null) {
                return -1;
            } else {
                switch (type) {
                    case STRING:
                        // 换行符（数据需要提前解析好）
                        int index = cellData.getStringValue().indexOf("\n");
                        return index != -1 ?
                            cellData.getStringValue().substring(0, index).getBytes().length + 1 : cellData.getStringValue().getBytes().length + 1;
                    case BOOLEAN:
                        return cellData.getBooleanValue().toString().getBytes().length;
                    case NUMBER:
                        return cellData.getNumberValue().toString().getBytes().length;
                    default:
                        return -1;
                }
            }
        }
    }
}