File Upload to Server Directory Using Spring MVC

Question

I am trying to upload a file to the server directory from client machine. I used the following codes :

FileUpload.jsp

<form:form commandName="fileUpload" action="upload.action" method="post"  enctype="multipart/form-data">
<form:label path="fileData">Upload a File</form:label> <br />
<form:input type="file"  path="fileData" />
<input type="submit" value="upload" >
</form:form>

In my Controller:

@RequestMapping("/upload.action")
public String upload(@ModelAttribute("fileUpload") FileUpload fileUpload,HttpServletResponse response,Model model)
{
    CommonsMultipartFile multipartFile = fileUpload.getFileData();
    String orginalName = multipartFile.getOriginalFilename();
    String filePath = "/my_uploads/"+orginalName;
    File destination = new File(filePath);
    String status ="success";
    try {
        multipartFile.transferTo(destination);
    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        status="failure";
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        status="iofailure";
    }
    model.addAttribute("status", status);
    return "home";
}

FileUpload.java :

{
   private CommonsMultipartFile fileData;
   ....
}

NullPointerException is thrown at the line String orginalName = multipartFile.getOriginalFilename(); .. what wrong thing i have done??

Kevin Bowersox · Accepted Answer · 2012-12-31 12:44:52Z

6

Try adding the MultipartFile as a parameter in your requesthandler.

@RequestMapping("/upload.action")
public String upload(@RequestParam(value = "file") MultipartFile file,
        HttpServletResponse response,Model model)
{
    //Controller logic...
}

This will require you to register a new bean in your dispatcher's configuration.

<bean id="multipartResolver"
   class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="5000000"/>
</bean>

edited Dec 31, 2012 at 12:44

answered Dec 31, 2012 at 12:27

Kevin Bowersox

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7 Comments

schoolcoder Over a year ago

Exception thrown as

org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.web.multipart.MultipartFile]: Specified class is an interface

Kevin Bowersox Over a year ago

@user1849556 see updated controller, sorry about that. It should have used @RequestParam instead of @ModelAttribute

schoolcoder Over a year ago

Thank you Kevin! now the Exception is java.io.FileNotFoundException: \my_uploads\xxx.pdf (The system cannot find the path specified) .. do i have to manually create my_uploads folder?

Kevin Bowersox Over a year ago

The directory should exist whether you manually create it or programatically create it.

Kevin Bowersox Over a year ago

You need to place it in the folder specified in the system property user.dir. I usually just print out this environment variable then adjust: System.out.println(System.getProperty("user.dir"));

|

Darshan · Accepted Answer · 2015-08-18 12:44:35Z

0

@RequestMapping("/upload.action")
public String upload(@RequestParam("fileData") MultipartFile file,
        HttpServletResponse response,Model model)
{
    //Controller logic...
}

you should have the same name in the parameter for your request handler method ,whatever you given in the FileUpload Pojo for multipartFile ("fileData") it should be in the parameter

Thanks,

answered Aug 18, 2015 at 12:44

Darshan

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