如何将上传的多PDF文件存储到Java中的特定位置？

Question

i want to store uploaded file in a specific location in java. if i upload a.pdf then i want it to store this at "/home/rahul/doc/upload/" . i went through some questions and answers of stack overflow but i am not satisfied with solutions.

i am working with Play Framework 2.1.2 . i am not working with servlet .

i am uploading but it is storing file into temp directory but i want that file store into a folder as not a temp file i want that file like a.pdf in folder not like temp file.

public static Result upload() {
    MultipartFormData body = request().body().asMultipartFormData();
    FilePart filePart1 = body.getFile("filePart1");
    File newFile1 = new File("path in computer");
    File file1 = filePart1.getFile();
    InputStream isFile1 = new FileInputStream(file1);
    byte[] byteFile1 = IOUtils.toByteArray(isFile1);
    FileUtils.writeByteArrayToFile(newFile1, byteFile1);
    isFile1.close();

}

but i am not satisfied with this solution and i am uploading multiple doc files.

for eg. i upload one doc ab.docx then after upload it is storing temp directory and file is this:

and it's location is this: /tmp/multipartBody5886394566842144137asTemporaryFile

but i want this: /upload/ab.docx

tell me some solution to fix this.

Answer 1

Everything's correct as a last step you need to renameTo the temporary file into your upload folder, you don't need to play around the streams it's as simple as:

public static Result upload() {
    Http.MultipartFormData body = request().body().asMultipartFormData();
    FilePart upload = body.getFile("picture");

    if (upload != null) {
        String targetPath = "/your/target/upload-dir/" + upload.getFilename();
        upload.getFile().renameTo(new File(targetPath));
        return ok("File saved in " + targetPath);
    } else {
        return badRequest("Something Wrong");
    }
}

BTW you should implement some checking if targetPath doesn't exist to prevent errors and/or overwrites. Typical approach is incrementing the file name if file with the same name already exists, for an example sending a.pdf three times should save the files as a.pdf , a_01.pdf , a_02.pdf , etc.

Answer 2

i just completed it. My solution is working fine.

My solution of uploading multiple files is :

public static Result up() throws IOException{

            MultipartFormData body = request().body().asMultipartFormData();
                List<FilePart> resourceFiles=body.getFiles();
                InputStream input;
                OutputStream output;
                File part1;
                String prefix,suffix;
                for (FilePart picture:resourceFiles) {

                 part1 =picture.getFile();
                  input= new FileInputStream(part1);
                  prefix = FilenameUtils.getBaseName(picture.getFilename()); 
                    suffix = FilenameUtils.getExtension(picture.getFilename());

                    part1=new File("/home/rahul/Documents/upload",prefix+"."+suffix);
                    part1.createNewFile();

                    output = new FileOutputStream(part1);
                    IOUtils.copy(input, output);
                    Logger.info("Uploaded file successfully saved in " + part1.getAbsolutePath());

                }