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Angular-SpringBoot下载了Excel文件HttpErrorResponse

问题内容：

我正在使用带有倾斜首页的Spring Boot服务器。我可以.xlsx从前台下载文件。

这是我的代码：服务器端代码：

 @GetMapping("/ExportExcel{date}")
 public ResponseEntity<InputStreamResource> excelExportReport(@RequestParam Date date) throws IOException {

List<InterfaceTable> interfaceTables=interfaceTableRepo.afficheAHT(date);
       ByteArrayInputStream in =ExportExcel.ahtToExcel(interfaceTables);
       HttpHeaders headers = new HttpHeaders();
       headers.add("Content-Disposition", "attachment; filename=customers.xlsx");

return ResponseEntity
             .ok()
             .headers(headers)
             .body(new InputStreamResource(in));

}
角服务：

 ExportExcel(date:string){
 return this.http.get<Operation[]>(this.exportUrl+date) }

问题是，HttpErrorResponse即使它有一个角度，我也可以得到：

错误：SyntaxError错误：在XMLHttpRequest.onLoad（http：// localhost：4200 /
vendor.js：9948：51
）的JSON.parse（）位置0处的JSON中的意外令牌P（位于ZoneDelegate.invokeTask（http：//
localhost： 4200 /
polyfills.js：3240：31）在对象`


问题答案：

弹簧控制器

 @GetMapping("/ExportExcel/{date}")
 public void excelExportReport(@RequestParam Date date, HttpServletResponse httpServletResponse) throws IOException {

           List<InterfaceTable> interfaceTables=interfaceTableRepo.afficheAHT(date);
           ByteArrayInputStream in =ExportExcel.ahtToExcel(interfaceTables);
           byte[] byteArray = new byte[in.available()];
           try {
               byteArrayInputStream.read(byteArray);
           } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }

           ByteArrayOutputStream out = new ByteArrayOutputStream(byteArray.length);
           out.write(byteArray, 0, byteArray.length);

           httpServletResponse.setContentType("text/csv");
           httpServletResponse.addHeader("Content-Disposition", "attachment; filename=customers.csv");

           OutputStream os;
           try {
               os = httpServletResponse.getOutputStream();
               out.writeTo(os);
               os.flush();
               os.close();
           } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }
    }

前端服务

return this.http.get("/ExportExcel/", this.commonRepository.getRequestOptionsForCSV(URL.BEARER)).map(res => {
          return {
              filename: 'customers.csv',
              data: res.blob()
            };
});

前端组件

this.customerService.generateReportCsv(this.receiptReportPage.value).subscribe((results)=>{
    console.log(results);

    var url = window.URL.createObjectURL(results.data);

    var a = document.createElement('a');
    document.body.appendChild(a);
    a.setAttribute('style', 'display: none');
    a.setAttribute('target', 'blank');
    a.href = url;
    a.download = results.filename;
    a.click();
    window.URL.revokeObjectURL(url);
    a.remove();
});