springmvc: file upload

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First, the traditional way

1. Import jar package file upload

<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>

2. Write file upload jsp page

<h3>文件上传</h3>
<form action="user/fileupload" method="post" enctype="multipart/form-data">
选择文件：<input type="file" name="upload"/><br/>
<input type="submit" value="上传文件"/>
</form>

3. Write file upload Controller Controller (file upload traditional way)

@Controller 
@ RequestMapping ( "/ the User" )
 public  class the UserController { 

    / ** 
     * File upload 
     * @return 
     * / 
    @ RequestMapping ( "/ fileupload1" )
     public String fileupload1 (the HttpServletRequest Request) throws Exception { 
        System.out.println ( " file upload " );
         // use fileupload complete file upload component
         // location uploaded 
        String path = Request.getSession () GetServletContext () the getRealPath (.." / uploads / " );
         // determines whether the path exists 
        file file = newFile (path);
         IF (! File.Exists ()) {
             // create the folder 
            file.mkdirs (); 
        } 

        // parse the request object, upload files to obtain entry 
        DiskFileItemFactory = Factory's new new DiskFileItemFactory (); 
        ServletFileUpload the Upload = new new ServletFileUpload (Factory);
         // parse Request 
        List <the FileItem> items = upload.parseRequest (Request);
         // iterate 
        for (the FileItem item: items) {
             // for determining, whether the current object is an item to upload a file entry 
            iF (item. isFormField ()) {
                 //Description is a common form to 
            } the else {
                 // instructions for uploading a file entry
                 // Get the name of the uploaded file 
                String filename = item.getName ();
                 // the name of the file set unique value, UUID 
                String UUID = UUID.randomUUID () . .toString () the replace ( "-", "" ); 
                filename = uuid + filename;
                 // complete file upload 
                item.write ( new new file (path, filename));
                 // delete temporary files 
                item.delete (); 
            } 
        } 

        return "Success"  ;
    }
}

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Two, springmvc way

1, the configuration file parser in springmvc.xml

<! - Configuration file parser -> 
    <bean the above mentioned id = "the MultipartResolver" class = "org.springframework.web.multipart.commons.CommonsMultipartResolver"> 
        <! - Configuration file upload size -> 
        <Property name = " maxUploadSize "value =" 10485760 "/> 
    </ the bean>

2, springmvc upload files

    / ** 
     * SpringMVC upload 
     * @param Request 
     * @return 
     * @throws Exception
      * / 
    @ RequestMapping ( "/ fileupload2" )
     public String fileupload2 (the HttpServletRequest Request, MultipartFile the Upload) throws Exception { 
        System.out.println ( "File SpringMVC Upload " );
         // use fileupload complete file upload component
         // upload location 
        String path = Request.getSession () GetServletContext () the getRealPath (.." / uploads / " );
         // determines whether the path exists 
        file file = new newFile (path);
         IF (! File.Exists ()) {
             // create the folder 
            file.mkdirs (); 
        } 

        // instructions to upload a file entry
         // Get the name of the uploaded file 
        String filename = upload.getOriginalFilename ();
         // the name of the file to set a unique value, uuid 
        String uuid = UUID.randomUUID () toString () the replace ( "-", ".". ); 
        filename = uuid + "_" + filename;
         // complete file upload 
        upload .transferTo ( new new File (path, filename)); 

        return "Success" ; 
    }

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Three, springmvc upload files across servers

1, set up image server

2, need to import jar package

<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-core</artifactId>
<version>1.18.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.18.1</version>
</dependency>

 

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