前言:使用excel模板导出excel的好处在于可以事先在模板上定义颜色、格式等，适用于模板设计得比较灵活复杂的场景

一.添加jar包

        <dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-base</artifactId><version>3.2.0</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-web</artifactId><version>3.2.0</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-annotation</artifactId><version>3.2.0</version></dependency>

二.添加工具类

package com.xinke.sunshine_ebid.common.utils;import cn.afterturn.easypoi.excel.ExcelExportUtil;
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.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;public class EasyPoiUtils {private EasyPoiUtils() {}public static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {try {fileName += ".xls";response.setCharacterEncoding("UTF-8");response.setHeader("content-Type", "application/vnd.ms-excel");response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));response.setHeader("FileName", URLEncoder.encode(fileName, "utf-8"));response.setHeader("Access-Control-Expose-Headers", "FileName");workbook.write(response.getOutputStream());} catch (IOException e) {throw new RuntimeException(e);}}public static void downLoad2007Excel(String fileName, HttpServletResponse response, Workbook workbook) {try {fileName += ".xlsx";response.setCharacterEncoding("UTF-8");response.setHeader("content-Type", "application/vnd.ms-excel");response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));response.setHeader("FileName", URLEncoder.encode(fileName, "utf-8"));response.setHeader("Access-Control-Expose-Headers", "FileName");workbook.write(response.getOutputStream());} catch (IOException e) {throw new RuntimeException(e);}}public static <T> void defaultExport(List<T> dataList, Class<?> clz, String fileName, HttpServletResponse response, ExportParams exportParams) {Workbook workbook = ExcelExportUtil.exportExcel(exportParams, clz, dataList);if (workbook != null) {downLoadExcel(fileName, response, workbook);}}public static <T> void exportExcel(List<T> dataList, String title, String sheetName, Class<?> clz, String fileName, boolean isCreateHeader, HttpServletResponse response) {ExportParams exportParams = new ExportParams(title, sheetName);exportParams.setCreateHeadRows(isCreateHeader);defaultExport(dataList, clz, fileName, response, exportParams);}public static <T> void exportExcel(List<T> dataList, String title, String sheetName, Class<?> clz, String fileName, HttpServletResponse response) {defaultExport(dataList, clz, fileName, response, new ExportParams(title, sheetName));}private static void defaultExport(List<Map<String, Object>> dataList, String fileName, HttpServletResponse response) {Workbook workbook = ExcelExportUtil.exportExcel(dataList, ExcelType.HSSF);if (workbook != null) {downLoadExcel(fileName, response, workbook);}}public static void exportExcel(List<Map<String, Object>> dataList, String fileName, HttpServletResponse response) {defaultExport(dataList, fileName, response);}public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> clz) {if (StringUtils.isBlank(filePath)) {return null;}ImportParams params = new ImportParams();params.setTitleRows(titleRows);params.setHeadRows(headerRows);try {return ExcelImportUtil.importExcel(new File(filePath), clz, params);} catch (Exception e) {throw new RuntimeException(e.getMessage());}}public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> clz) {if (file == null) {return null;}ImportParams params = new ImportParams();params.setTitleRows(titleRows);params.setHeadRows(headerRows);try {return ExcelImportUtil.importExcel(file.getInputStream(), clz, params);} catch (Exception e) {throw new RuntimeException(e);}}
}

三.制作模板

将要替换的参数用{{}}包括起来，集合类型的遍历数据用{{!fe:集合名 t.参数名1 t.参数名2}}这种形式遍历，多sheet可使用，需要居中或者颜色设置等均可以在模板上直接修改

四.代码应用

集合类

package com.xinke.sunshine_ebid.dal.entity;import lombok.Data;@Data
public class TestEntity {private String name;private String phone;private String address;
}

控制层

package com.xinke.sunshine_ebid.webapp;import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.entity.TemplateExportParams;
import com.xinke.sunshine_ebid.common.utils.EasyPoiUtils;
import com.xinke.sunshine_ebid.service.TestService;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;@CrossOrigin
@RestController
@RequestMapping(value = "/Test")
public class TestController {@Resourceprivate TestService testService;/*** 使用Excel模板导出excel表格* @param response* @throws Exception*/@GetMapping("/test")public void test(HttpServletResponse response) throws Exception{// 使用map来封装参数Map<String, Object> map = testService.test();// 模板路径TemplateExportParams params = new TemplateExportParams("fileRecord/template/excel/test1.xlsx", true);String fileName = "导出来的报表名称";Workbook workbook = ExcelExportUtil.exportExcel(params, map);workbook.setForceFormulaRecalculation(true);EasyPoiUtils.downLoad2007Excel(fileName, response, workbook);}
}

业务逻辑层

package com.xinke.sunshine_ebid.service;import com.xinke.sunshine_ebid.common.utils.CustomXWPFDocument;
import com.xinke.sunshine_ebid.common.utils.WordUtil;
import com.xinke.sunshine_ebid.dal.entity.TestEntity;
import freemarker.template.Configuration;
import freemarker.template.Template;
import org.apache.poi.xwpf.usermodel.*;
import org.springframework.stereotype.Service;import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Writer;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;@Service
public class TestService {public Map<String,Object> test() throws Exception{// 封装参数Map<String, Object> params = new HashMap<>();params.put("date","2023年3月7日");List<TestEntity> list = new ArrayList<>();TestEntity test = new TestEntity();test.setName("瓜");test.setPhone("18888888888");test.setAddress("PD");list.add(test);TestEntity test2 = new TestEntity();test2.setName("瓜2");test2.setPhone("1999999999");test2.setAddress("PD2");list.add(test2);params.put("list",list);return params;}
}

五.测试

localhost:本地端口/Test/test

导出成功