Question

我是REST的新手。我必须想出Rest Controller，它将文件名作为参数并显示其内容。下面是代码

@RequestMapping(value = "/paths", method = RequestMethod.GET, produces = "application/pdf")

  public ResponseEntity<InputStreamResource> downloadPDFFile() throws IOException {

    ClassPathResource pdfFile = new ClassPathResource("PACKING LIST PDF 3000730933.pdf");

    HttpHeaders headers = new HttpHeaders();
    headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
    headers.add("Pragma", "no-cache");
    headers.add("Expires", "0");

    return ResponseEntity.ok().headers(headers).contentLength(pdfFile.contentLength())
        .body(new InputStreamResource(pdfFile.getInputStream()));
  }

上面的代码将显示pdf的内容，因为提到了produces = "application/pdf"。我想拥有通用代码，它将采用image，doc，docx，xls，xlsx等所有文件格式，并显示内容并发送内容在回应。

有人可以建议我这方法吗？

Answer 1

实现此目的的最佳方法是使用单独的映射（方法），这将为您生成特定的格式。

@RequestMapping(value = "/paths")
public class YourApplication
{
      @RequestMapping(value = "/pdf", method = RequestMethod.GET, produces = "application/pdf")
      public ResponseEntity<InputStreamResource> downloadPDFFile() throws IOException {
         // you code for pdf
      }

      @RequestMapping(value = "/xlsx", method = RequestMethod.GET, produces = "application/xlsx")
      public ResponseEntity<InputStreamResource> downloadXLSXFile() throws IOException {
         // you code for xlsx
      }
}

然后，您可以获得特定类型的以下请求网址

/paths/pdf

和

/paths/xlsx

如何使用弹簧和平针织物生产多种介质类型

1 个答案: