Could not Upload File using MongoDb GridFs

问题:

I'm new to Spring-Boot,i'm trying to upload file to Mongodb Database, save its objectId and link it to my document, in order to download it Later. Here is my class Person:

@Document
public class Person {
@Id
private String id;

private String firstName;
private String lastName;
private String age;
private String filename;
private ObjectId file;
 ....}

This is my controller method:

@RequestMapping(value="/addperson",method=RequestMethod.POST)
public String ajout(Model model,@Valid PersonForm pf){

    Person p=new Person(pf.getFirstname(),pf.getLastName(),pf.getAge());
    InputStream inputStream=null;
    try {
        inputStream = new FileInputStream("E:/usb/");
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    p.setFilename(pf.getFilename());
    repository.linkFileToMyDoc(p,inputStream,p.getFilename());
    repository.save(p);
    model.addAttribute("PersonForm",pf);
    return "personview";
}

I wonder if it is the best method to do it. the error i get is that access to "E:/usb/" is denied. Can anyone help please

回答1:

i found the solution after reading MultipartFile documentation. I uploaded file to server and then transfered it to directory,after allowing total control to directory "E:/usb/". this is my controller method:

   Person p=new Person(pf.getFirstname(),pf.getLastName(),pf.getAge());


    try {
        File dest = null;
        String str = "C:/tt/"+pf.getFile().getOriginalFilename();
        File dir = new File(str);
        dir.createNewFile();
        pf.getFile().transferTo(dir);
        p.setFilename(str);
        InputStream inputStream=pf.getFile().getInputStream();
         repository.linkFileToMyDoc(p,inputStream,pf.getFile().getOriginalFilename());
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    repository.save(p);
    model.addAttribute("PersonForm",pf);
    return "personview";
}

the linkFileToMydoc method, you'll find it in this link: How to reference GridFSFile with @DbRef annotation (spring data mongodb)