Html

<el-button @click=downloadExcel>資料匯出</el-button>
export default {
	methods:{
		downloadExcel(){
			window.location.href='/api/visitors/downloadExcel'
		}
	}
}

Java

@RequestMapping(value = "UserExcelDownloads", method = RequestMethod.GET)
    public void downloadAllClassmate
 
(HttpServletResponse response) throws IOException {
        HSSFWorkbook workbook = new HSSFWorkbook();
        
        HSSFSheet sheet = workbook.createSheet("資訊表");
        
        String fileName = "abc.xls";//設定要匯出的檔案的名字
        
 		String[] headers = { "學號", "姓名", "身份型別", "登入密碼"};//headers表示excel表中第一行的表頭
 

        
        HSSFRow row = sheet.createRow(0);//在excel表中新增表頭

        for(int i=0;i<headers.length;i++){
            HSSFCell cell = row.createCell(i);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }
        
        response.
 
setContentType("application/octet-stream");
        response.setHeader("Content-disposition", "attachment;filename=" + fileName);
        response.flushBuffer();
        workbook.write(response.getOutputStream());
    }

建立過程 workbook => sheet => row => cell，此方式如果需要傳參，可以/api/visitors/downloadExcel'?a=1&b=2的方式傳少量引數，因為get方式不支援大量資料傳參。