import {FileUploadModule} from 'primeng/primeng';
@NgModule({
  imports: [FileUploadModule]
})

<label>照片：</label>
<div>
  <!--上传组件 -->
   <p-fileUpload 
     name="uploadPhoto[]" 
     url="http://localhost:3333/api/upload"
     (onUpload)="onPhotoUpload($event)" accept="image/*" maxFileSize="1000000">
     <template pTemplate type="content">
       <ul *ngIf="photoFiles.length">
         <li *ngFor="let file of photoFiles">
           {{file.name}} - {{file.size}} bytes
         </li>
       </ul>
     </template>
   </p-fileUpload>
</div>
<!--如果图片上传成功，显示图片 -->
<div *ngIf="demo.photo">
  <img src="{{photoUrl}}">
</div>

class Demo{
  photo:String;
}
demo = new Demo();
photoFiles: any[] = [];
photoUrl:string;
onPhotoUpload(event) {
  this.demo.photo = JSON.parse(event.xhr.response).data.name;
  this.photoUrl ="upload/demo/"+this.demo.photo;
    for(let file of event.files) {
      this.photoFiles.push(file);
    }
  }

router.post('/upload', function (req, res) {
  //文件
  const photoData = req.files.uploadPhoto[0];
  //文件路径
  const filePath = photoData.path;
  //读取文件
  fs.readFile(filePath, function (err, data) {
    //取时间戳用来命名
    const timestamp = Date.now();
    //取文件类型用来命名
    const type = photoData.type.split('/')[1];
    //命名文件
    const photo = timestamp + '.' + type;
    //存储路径
    const newPath = path.join(__dirname, '../', 'upload/demo/' + photo);
    //写入文件
    fs.writeFile(newPath, data, function (err) {
      //返回状态1表示成功，返回的数据是存储后的文件名
      const reply = {
        status: 1,
        data: {
          name: photo
        }
      };
      res.end(JSON.stringify(reply));
    })
  });
});