1、pom.xml文件增加依赖：
<dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId></dependency>2、接口代码如下：
/*** 企业列表--导出*/@GetMapping(value = "/downloadTenantList")public void downloadTenantList(HttpServletRequest request,HttpServletResponse response) {response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");response.setCharacterEncoding("utf-8");Workbook wb = new SXSSFWorkbook(500);Sheet sheet = wb.createSheet();wb.setSheetName(0,"企业");Row titleRow1 = sheet.createRow(0);titleRow1.setHeightInPoints(30);Cell titleCellID = titleRow1.createCell(0);titleCellID.setCellValue("ID");Cell titleCellName = titleRow1.createCell(1);titleCellName.setCellValue("名称");Row titleRow2 = sheet.createRow(1);titleRow2.setHeightInPoints(30);Cell valCellID2 = titleRow2.createCell(0);valCellID2.setCellValue("ID");Cell valCellName2 = titleRow2.createCell(1);valCellName2.setCellValue("名称");try{wb.write(response.getOutputStream());}catch (Exception e){log.error("导出企业Excel异常{}", e.getMessage());}finally{IOUtils.closeQuietly(wb);}}3、前端代码如下，可以作为参考，但需要根据实际情况整理
import { saveAs } from 'file-saver'
function blobValidate(data) {return data.type !== 'application/json'
}
/**
* 参数处理
* @param {*} params 参数
*/
export function tansParams(params) {let result = ''for (const propName of Object.keys(params)) {const value = params[propName];var part = encodeURIComponent(propName) + "=";if (value !== null && value !== "" && typeof (value) !== "undefined") {if (typeof value === 'object') {for (const key of Object.keys(value)) {if (value[key] !== null && value[key] !== "" && typeof (value[key]) !== 'undefined') {let params = propName + '[' + key + ']';var subPart = encodeURIComponent(params) + "=";result += subPart + encodeURIComponent(value[key]) + "&";}}} else {result += part + encodeURIComponent(value) + "&";}}}return result
}
export function download(url, params, filename, config) {downloadLoadingInstance = Loading.service({ text: "正在下载数据，请稍候", spinner: "el-icon-loading", background: "rgba(0, 0, 0, 0.7)", })return service.post(url, params, {transformRequest: [(params) => { return tansParams(params) }],headers: { 'Content-Type': 'application/x-www-form-urlencoded' },responseType: 'blob',//使用这个或者{responseType:'arraybuffer'}...config}).then(async (data) => {const isBlob = blobValidate(data);if (isBlob) {const blob = new Blob([data])saveAs(blob, filename)} else {const resText = await data.text();const rspObj = JSON.parse(resText);const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']Message.error(errMsg);}downloadLoadingInstance.close();}).catch((r) => {console.error(r)Message.error('下载文件出现错误，请联系管理员！')downloadLoadingInstance.close();})
}这样就可以通过调用接口的方式导出excel文件，请求接口就可以在header中设置认证头
)
