hutool 导出excel 何苦

Hutool excel导出

参考文档：
excel导出Hutool官方教程
excel导出Hutool api 地址
https://apidoc.gitee.com/loolly/hutool/cn/hutool/poi/excel/package-frame.html

安装包

<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>5.2.2</version>
</dependency>

<!-- https://mvnrepository.com/artifact/cn.hutool/hutool-all -->
<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.8.0</version>
</dependency>

<!-- https://mvnrepository.com/artifact/com.alibaba/easyexcel -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>3.0.5</version>
</dependency>

导出代码

public void exportScanCodePage(HttpServletRequest request, HttpServletResponse response) {
  String distributorName = request.getParameter("distributorName");
  IPage<ScanCodeResponseVO> pages = orderSplitService.getScanCodePage(scanCodeRequestVO);
  String fileName = "文件名称";
  // 此处为了有序
  Map<String, String> head = new LinkedHashMap<>();
  head.put("field1", "字段1");
  head.put("field2", "字段2");
  head.put("field3", "字段3");
  head.put("field4", "字段4");
  head.put("field5", "字段5");
  ExcelExportUtil.export(response, pages.getRecords(), head, fileName + "统计");
}

package com.bison.tracecode.config;


import cn.hutool.core.io.IoUtil;
import cn.hutool.poi.excel.ExcelUtil;
import cn.hutool.poi.excel.ExcelWriter;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
import java.util.Map;

/***
 * 导入
 * @author: YanJiaQing
 * @date 2021/9/17 17:00
 **/

@Slf4j
public class ExcelExportUtil {

	public static void export(HttpServletResponse response, List rows, Map<String, String> head, String sheetName) {
		ServletOutputStream out = null;
		try {
			ExcelWriter writer = ExcelUtil.getWriter(true);
			Sheet sheet = writer.getSheet();
			//自定义标题别名
			for (Map.Entry<String, String> entry : head.entrySet()) {
				writer.addHeaderAlias(entry.getKey(), entry.getValue());
			}
			// 默认的，未添加alias的属性也会写出，如果想只写出加了别名的字段，可以调用此方法排除之
			writer.setOnlyAlias(true);
			writer.renameSheet(sheetName);
			writer.write(rows, true);
			// 设置所有列为自动宽度，不考虑合并单元格
			setSizeColumn(sheet, head.size());
			response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
			response.setHeader("Content-Disposition", "attachment;filename="
				+ java.net.URLEncoder.encode(sheetName, "UTF-8") + ".xlsx");
			out = response.getOutputStream();
			writer.flush(out, true);
			writer.close();
			IoUtil.close(out);
		} catch (IOException e) {
			log.error("数据导出异常", e);
		} finally {
			IoUtil.close(out);
		}
	}

	public static void setSizeColumn(Sheet sheet, int size) {
		for (int columnNum = 0; columnNum <= size; columnNum++) {
			int columnWidth = sheet.getColumnWidth(columnNum) / 256;
			for (int rowNum = 0; rowNum <= sheet.getLastRowNum(); rowNum++) {
				Row currentRow;
				//当前行未被使用过
				if (sheet.getRow(rowNum) == null) {
					currentRow = sheet.createRow(rowNum);
				} else {
					currentRow = sheet.getRow(rowNum);
				}

				if (currentRow.getCell(columnNum) != null) {
					Cell currentCell = currentRow.getCell(columnNum);
					int cellType = currentCell.getCellType();
					int code = CellType.STRING.getCode();
					if (cellType == code) {
						int length = currentCell.getStringCellValue().getBytes().length;
						if (columnWidth < length) {
							columnWidth = length;
						}
					}
				}
			}
			sheet.setColumnWidth(columnNum, columnWidth * 256);
		}
	}

}