How to create a file upload browser in spring roo?

I'm new in spring roo. I want to create a page with file upload. I used spring roo to create all pages and i try to use it to create a file browser button in file upload page. The problem is spring roo using spring form tag which doesn't have file browser. I solve this problem by using html input type="file" tag instead, but the spring roo showed the error like this "Failed to invoke handler method [public void egat.spring.roo.ptu.io.web.ImportExcelController.p ost(java.lang.Long,org.springframework.ui.ModelMap ,javax.servlet.http.HttpServletRequest,javax.servl et.http.HttpServletResponse)]; nested exception is java.lang.IllegalStateException: Could not find @PathVariable [id] in @RequestMapping "

How can i solve this problem?

Hi,

I also struggled with fileupload maybe my post os stackoverlfow can help you.

HTH

You may like to vote for or watch issue https://jira.springsource.org/browse/ROO-442.

tested in Roo 1.0.2

1: modify create.jsp: add enctype="multipart/form-data" and <input type="file" name="file"/>

PHP Code:

---

<form:form action="${form_url}" method="POST" modelAttribute="big" enctype="multipart/form-data">
  file:  <input type="file" name="file" /> 


---

2: modify entity:

PHP Code:

---


@Entity
@RooJavaBean
@RooToString
@RooEntity
public class Big {

    @Size(max = 10240)
    private String content;

    @Size(max = 20)
    private String name;

    @Transient
    private CommonsMultipartFile file; // added

    private String fileName; // added
    private long size; //added 

    public CommonsMultipartFile getFile() {
        return file;
    }

       // save file to disk ,save filename , file size to database 
    public void setFile(CommonsMultipartFile file) {
        this.file = file;
        this.fileName = file.getOriginalFilename();
        this.size = file.getSize();
        System.out.println(" hehe  this.fileName: " + this.fileName + " ,  "
                + file.getClass().getName());

        try {
            InputStream in = file.getInputStream();
            FileOutputStream f = new FileOutputStream("f:/work/tempDir/"
                    + new Date().getTime());

            int ch = 0;
            while ((ch = in.read()) != -1) {
                f.write(ch);
            }
            f.flush();
            f.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    } 


---

Alternatively you can also store the file content directly into the database by using a propertyeditor to bind the file-contents to a byte-array property of your entity.

Depending on your usecase this may or may not be a good idea. It is a tradeoff between database size and speed of file retrieval (db-io is probably faster than filesystem-io)

See this thread for a full discussion.

thankz huang, your code working perfectly..

I'm trying this solution with Roo 1.1.0 M2 and not having much luck. I've munged around with the generated jspx file and it appears to be generating the proper HTML (multipart encoded, <input type="file">), but my object never has setFileData called on it.

Has anyone gotten file upload to work simply with Roo 1.1.0 M2?

-pete

Nice, Huang! Thank you for helping out... I was also having same issue, your instructions worked out with mine too!

Quote:

---

Originally Posted by huang

tested in Roo 1.0.2 (...)

---

Your approach combined with the modified tags as described in https://jira.springsource.org/browse/ROO-442 (I actually added a field:file tag) worked for me as well (Roo 1.1.0) including storage in the database. I had to add commons-io as dependency to get it to work.

I am trying to get the file upload styled nicely.

In the Dojo demo (http://demos.dojotoolkit.org/demos/u.../?forceNoFlash) they have styles like 'dijitFileInputReal' for the file upload but I don't see them in the included ROO Dojo CSS files, which I can't find anywhere.

If you leave the default ROO form styling with Spring.addDecoration the file upload field is not usable (at least on a Mac).