maven

<dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>${easyexcel.version}</version>
</dependency>

导出行的对象

import com.alibaba.excel.annotation.ExcelIgnore;
import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Data;import java.util.Date;@Data
public class ExportItem {@ExcelProperty({"名称"})private String name;@ExcelProperty({"一级","二级头"})String data1;@ExcelProperty({"一级","二级头", "三级头","四级"})String data2;@ExcelProperty({"一级","二级头", "三级头","四级"})String data3;/*** 忽略这个字段*/@ExcelIgnoreprivate String ignoreData;
}

导出excel下载

// 导出excel
HttpServletResponse response;
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");String fileName = "test_export";
fileName = URLEncoder.encode(fileName,"utf-8").replaceAll("\\+", "%20");
response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");OutputStream outputStream = response.getOutputStream();
EasyExcel.write(outputStream,ExportItem.class).autoCloseStream(Boolean.FALSE).sheet(fileName).doWrite(exportItems);

https://blog.csdn.net/weixin_51216079/article/details/119782920