我花了最后几个小时浏览不同的Stack Overflow线程，讨论如何下载excel文件并将ByteArrayOutputStreams传递给前端。 我有一个Spring Boot后端，它可以创建一个自定义的Excel工作簿和相应的工作表。 但是，看起来从后端返回到角度6前端的二进制文件可能格式不正确。 我已经包含了不同的服务和控制器以及可能格式错误的数据。
响应体(截断值)：
"PK]�uN_rels/.rels���j�0��}
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t"�^�l;1W)�N�iD)ejuD�cKz[:}g����@:�
�3����4�7N�s_ni�G�M*7�����2R�+� �2�/�����b��mC�Pp�ֱ$POyQ�抒�DsZ��IС�'un���~�PK����OPK]�uN[Content_Types].xml�SMO1��+6��m��1���G%��β...."
ExcelWriterService.java
private XSSFWorkbook workbook = new XSSFWorkbook();
public byte[] excelExporter(QueryResultsDataset data) {
List tableList = data.getTables();
List> dataRows = tableList.get(0).getRows();
OutputStream outputStream = new ByteArrayOutputStream();
... Create Excel workbook
workbook.write(outputStream);
outputStream.close();
workbook.close();
} catch (IOException ex) {
// Doing nothing
}
return ((ByteArrayOutputStream) outputStream).toByteArray();
弹簧控制器
@RequestMapping(value = "", method = RequestMethod.POST)
public @ResponseBody ResponseEntity export(@RequestBody SavedQuery request, Principal principal) {
//Run the job
QueryResultsDataset dataset = dataExportJob.getQueryResultsDataset();
ExcelWriterService ews = new ExcelWriterService();
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
StringBuilder filename = new StringBuilder("hello").append(".xlsx");
headers.add("content-disposition", "inline;filename=" + filename.toString());
headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");
QueryResultsDataset fixResults = (QueryResultsDataset) fixMultiplier(dataset, request);
byte [] bytes = ews.excelExporter(fixResults);
ResponseEntity response = new ResponseEntity(bytes, headers, HttpStatus.OK);
return response;
}
}
Downloader.service.ts(Angular 6服务)
public exportExcel(search: any) {
const opts = [];
const tables = [];
this.api.download(environment._downloadDataEndPoint, search, {})
.subscribe(response => {
console.log(response);
var contentType = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
let blob = new Blob([response], {type: contentType});
let link = document.createElement('a');
link.href = URL.createObjectURL(blob);
link.download = "dataweb.xlsx";
link.click();
}
...
}
Api服务(Angular 6服务)
download(url: string, body: any, header: any) {
header = JSON.parse(this._auth.getToken());
const headers = new Headers(header);
headers.append('responseType', ResponseContentType.Blob.toString());
const options = new RequestOptions({headers: headers});
const response = this.http.post(url, body, options)
.pipe(catchError((error: any) => observableThrowError(error)));
return response;
}
任何帮助都会很棒！ 我现在没有想法。 谢谢！
