使用EasyPOI导出excel示例

package com.mtoliv.sps.controller;

import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.FilenameUtils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Workbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestPart;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import com.mtoliv.sps.model.MapImportHanlder;

import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.params.ExcelExportEntity;
import cn.afterturn.easypoi.excel.export.ExcelExportServer;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;

@RestController
@RequestMapping(value = "/api/v1/excel")
@Api(tags = "导入导出相关操作参考实现 ")
public class ExcelController {

    private static final Logger logger = LoggerFactory.getLogger(ExcelController.class);

    @GetMapping(value = "/exportExcels", produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)
    @ApiOperation(value = "导出数据")
    public void exportExcels(HttpServletResponse response) throws IOException {

        List<ExcelExportEntity> entityList = new ArrayList<>();
        entityList.add(new ExcelExportEntity("用户ID", "id", 15));
        entityList.add(new ExcelExportEntity("用户名", "name", 15));
        entityList.add(new ExcelExportEntity("用户年龄", "age", 15));
        List<Map<String, String>> dataResult = getData();

        ExcelExportServer server = new ExcelExportServer();
        Workbook workbook = new HSSFWorkbook();

        ExportParams exportParams = new ExportParams();
        exportParams.setSheetName("用户列表");
        server.createSheetForMap(workbook, exportParams, entityList, dataResult);

        response.setCharacterEncoding("UTF-8");
        String filedisplay = "users.xls";
        filedisplay = URLEncoder.encode(filedisplay, "UTF-8");
        response.addHeader("Content-Disposition", "attachment;filename=" + filedisplay);

        OutputStream out = response.getOutputStream();
        workbook.write(out);
        out.close();
    }

    @PostMapping(value = "/importUsers")
    public void importUsers(@RequestPart(value = "file") MultipartFile  file) {

        logger.info(file.getOriginalFilename());

        String originalFilename = file.getOriginalFilename();
        String extension = FilenameUtils.getExtension(originalFilename);
        logger.info(extension);
        if (!"xlsx".equals(extension) && !"xls".equals(extension)) return;

        ImportParams params = new ImportParams();
        params.setDataHanlder(new MapImportHanlder());
        try {

            List<Map<String, Object>> list = ExcelImportUtil.importExcel(file.getInputStream(), Map.class, params);
            logger.info(list.size() + "");
        } catch (Exception e) {

            e.printStackTrace();
        }

    }

    private List<Map<String, String>> getData() {

        List<Map<String, String>> dataResult = new ArrayList<>();
        Map<String, String> u1 = new LinkedHashMap<>();
        u1.put("id", "1");
        u1.put("name", "cyf");
        u1.put("age", "21");
        Map<String, String> u2 = new LinkedHashMap<>();
        u2.put("id", "2");
        u2.put("name", "cy");
        u2.put("age", "22");
        dataResult.add(u1);
        dataResult.add(u2);
        return dataResult;
    }

}

注意：api部分：@GetMapping(value = "/api/v1/record/exportFireExcels", produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)

【转载：https://blog.csdn.net/zerobz/article/details/78962839】