一.後端：

@Log("匯出excel")
@ApiOperation(value = "查詢LawCaseCollectMain")
@GetMapping(value = "/lawCaseCollectMain/download")
public void download(HttpServletResponse response) throws IOException {
    // 這裡注意 有同學反應使用swagger 會導致各種問題，請直接用瀏覽器或者用postman
    try {
        response.setContentType("application/vnd.ms-excel
 
");
        response.setCharacterEncoding("utf-8");
        // 這裡URLEncoder.encode可以防止中文亂碼 當然和easyexcel沒有關係
        String fileName = URLEncoder.encode("測試", "UTF-8");
        response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
        // 這裡需要設定不關閉流
        EasyExcel.write(response.getOutputStream(), LawCaseCollectMainDownloadData.class
 
)
                .autoCloseStream(Boolean.FALSE)
                .sheet("模板")
                .doWrite(data());
    } catch (Exception e) {
        // 重置response
        response.reset();
        response.setContentType("application/json");
        response.setCharacterEncoding("utf-8");
        JsonResponse.fail().setMsg(
 
"匯出失敗");
    }
}

二.前端：

1.呼叫

 handleDown() {
      download().then((res) => {
        debugger;
        let blob = new Blob([res], { type: "application/xlsx" });
        let url = window.URL.createObjectURL(blob);
        const link = document.createElement("a"); // 建立a標籤
        link.href = url;
        link.download = "download.xlsx"; // 重新命名檔案
        link.click();
        URL.revokeObjectURL(url);
      });
    },

2.axios封裝呼叫：

export function download() {
  return request({
    url: '/BalDetail/download',
    method: 'get',
    responseType: 'blob'
  })
}