前端代码（参考）：$("#import").on('click', function(){ var createDate=$("#createdDate").val(); var key1=$("#key1").val(); if(createDate==null||createDate==""){ layer.msg("请选择创建时间段！在点击导出数据）"); return ; } var load = layer.load(); //原生ajax var xhr = new XMLHttpRequest(); //post方式请求后台的路径 xhr.open('post', gatewayServerUrl+'/execute/openApi/importByCreate2', true); //导出的Excel是二进制数据类型，所以设置为blob xhr.responseType = 'blob'; //请求头（key,value），请求头可以设置多个key-value对 xhr.setRequestHeader('Content-Type', 'application/json;charset=utf-8'); //返回成功，导出的Excel文件 xhr.onload = function () { if (this.status == 200) { layer.close(load); var blob = this.response; var a = document.createElement('a'); var url = window.URL.createObjectURL(blob); a.href = url; //设置文件名称 a.download = '产品完检管理【'+createDate+'】.xlsx'; a.click(); } } //请求的参数，json格式，后台要用json格式接收 xhr.send(JSON.stringify({ "createDate" : createDate, "key1":key1 }));});
后端代码（参考）：
List<ManuProductCheckExport> list = new ArrayList<>();OutputStream out = response.getOutputStream();//文件名需要这样写，不能在setHeader直接写中文名，否则下载的文件名字为空，只有后缀response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");response.setCharacterEncoding("utf-8");String fileName = URLEncoder.encode("导出数据产品完检", "UTF-8").replaceAll("\\+", "%20");response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");ExcelWriter excelWriter = EasyExcelFactory.write(out).build();EasyExcel.write(response.getOutputStream(), ManuProductCheckExport.class) .sheet("sheet") .doWrite(list);excelWriter.finish();out.flush();out.close(); 依赖：
<!-- easyexcel导入导出 --><dependency> <groupId>com.alibaba</groupId> <artifactId>easyexcel</artifactId> <version>2.2.7</version></dependency>