Angular Spring启动文件下载 [英] Angular Spring Boot File Download
本文介绍了Angular Spring启动文件下载的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
祝您阅读愉快!
我在此软件设置中执行了上传功能,但是我无法完成下载部分...我在这里尽可能地挖掘,这是我到目前为止所到达的地方.
I did the upload functionality on this software setup but I cannot finish the download part... Digged as much as I could around here and this is where I got so far.
我的代码如下:
服务器
@GetMapping(value = "/projects/file/download/{filename}/{projectId}")
public ResponseEntity<byte[]> getResource(@PathVariable String filename, @PathVariable Long
projectId,HttpServletResponse response) throws ResourceNotFoundException, IOException {
String fileLocation=//a location that I set, removed logic to make this shorter
File downloadFile= new File(fileLocation);
byte[] isr = Files.readAllBytes(downloadFile.toPath());
String fileName = filename;
HttpHeaders respHeaders = new HttpHeaders();
respHeaders.setContentLength(isr.length);
respHeaders.setContentType(new MediaType("text", "json"));
respHeaders.setCacheControl("must-revalidate, post-check=0, pre-check=0");
respHeaders.set(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + fileName);
return new ResponseEntity<byte[]>(isr, respHeaders, HttpStatus.OK);
}
角度服务
downloadFile(filename: string, projectId: number): Observable<any> {
return this.http.get(`${this.baseUrl}/file/download/` + filename + '/' + projectId, { responseType: 'blob' });
}
角度组件
downloadFile(fl: FileModel) {
//calling service
this.projectSerivce.downloadFile(fl.fileName, this.id).subscribe(response => {
window.open(response.url, '_blank');
});
}
它到达服务器并返回,然后打开一个新的空白浏览器选项卡,并且没有发生其他任何事情.
It reaches server and comes back and then a new blank browser tab is open and nothing else happens.. No error whatsoever.
推荐答案
尝试一下,
Spring Controller
@GetMapping(value = "/projects/file/download/{filename}/{projectId}")
public void getResource(@PathVariable String filename, @PathVariable Long
projectId,HttpServletResponse response) throws ResourceNotFoundException, IOException {
String fileLocation=//a location that I set, removed logic to make this shorter
File downloadFile= new File(fileLocation);
byte[] isr = Files.readAllBytes(downloadFile.toPath());
ByteArrayOutputStream out = new ByteArrayOutputStream(isr.length);
out.write(isr, 0, isr.length);
response.setContentType("application/pdf");
// Use 'inline' for preview and 'attachement' for download in browser.
response.addHeader("Content-Disposition", "inline; filename=" + fileName);
OutputStream os;
try {
os = httpServletResponse.getOutputStream();
out.writeTo(os);
os.flush();
os.close();
} catch (IOException e) {
e.printStackTrace();
}
/*HttpHeaders respHeaders = new HttpHeaders();
respHeaders.setContentLength(isr.length);
respHeaders.setContentType(new MediaType("text", "json"));
respHeaders.setCacheControl("must-revalidate, post-check=0, pre-check=0");
respHeaders.set(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + fileName);
return new ResponseEntity<byte[]>(isr, respHeaders, HttpStatus.OK);*/
}
角度服务
import { map } from "rxjs/operators";
downloadFile(filename: string, projectId: number): Observable<any> {
return this.http.get(`${this.baseUrl}/file/download/` + filename + '/' + projectId, { responseType: 'blob' }).pipe(map((response)=>{
return {
filename: 'yourFileName.pdf',
data: response.blob()
};
}));
}
角度组件
downloadFile(fl: FileModel) {
//calling service
this.projectSerivce.downloadFile(fl.fileName, this.id).subscribe(response => {
console.log(response);
var binaryData = [];
binaryData.push(response.data);
var url = window.URL.createObjectURL(new Blob(binaryData, {type: "application/pdf"}));
var a = document.createElement('a');
document.body.appendChild(a);
a.setAttribute('style', 'display: none');
a.setAttribute('target', 'blank');
a.href = url;
a.download = response.filename;
a.click();
window.URL.revokeObjectURL(url);
a.remove();
}, error => {
console.log(error);
});
}
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